JPH1125709A - Automotive lighting system using high-pressure discharge lamps - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent ultraviolet ophthalmia, a blue light disorder and erythema, as well as glare within the irradiation range by providing a removal means of visible light below a specific wavelength and ultraviolet rays among lights radiated from a high-voltage discharge lamp with a reflecting mirror and an irradiation lens in front of it. SOLUTION: A reflecting mirror 5b is provided with a visible and ultraviolet ray removing film 5g, such as an Au-Ge-SiO multilayered interference filter or the like, for the purpose of selective removal of visible light and ultraviolet rays with the wavelength <=520 nm among the emissions of a high-voltage discharge lamp 2. Method for providing a filter dispersed with semiconductor microcrystals of compounds II-IV such as CdS to the inside or the outside of a front irradiation lens 5a or using it for the removing film 5g may be applied to this removal means. Preferably, infrared disorder is prevented by providing an MgF2 -ZnS multilayered interference filter to the reflecting mirror 5b as a means for removing infrared rays of wavelengths >=800 nm from among the emission. For the removal of these three kinds of rays, a TiO2 -SiO2 mutlilayered interference filter may be provided to the inside or the outside of the high-voltage discharge lamp 2 or the front irradiation lens 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device using a high-pressure discharge lamp, and more particularly to an automobile using a high-pressure discharge lamp that removes a wavelength range that has an adverse effect on an illuminated object in a light emission spectrum distribution. It relates to a lighting device.

[0002]

2. Description of the Related Art FIG. 15 is a sectional view of a vehicle headlamp using, for example, a high pressure discharge lamp. 1 is an automobile lighting device, 2
Is a glass bulb 2a made of quartz glass, lead wires 2b, 2c,
A high-pressure discharge lamp composed of a light-shielding tube 2d, a holder 3, a start controller 4, a front irradiation lens 5a, and an irradiation unit including a reflecting mirror 5b having a paraboloid of revolution.

The starting controller 4 controls the starting and lighting of the high-pressure discharge lamp, and excites and emits mercury, a rare gas, and a metal halide sealed in the glass bulb 2a. This light is reflected by the reflecting mirror 5b to become substantially parallel rays, and the optical axis is adjusted to meet the purpose through the front illumination lens 5a to irradiate the object.

A high-pressure discharge lamp has a higher color temperature than an incandescent bulb or a halogen bulb, and has a large specific energy in an ultraviolet light region or a short wavelength region (violet to green) of visible light. FIG. 16 shows an example of a xenon lamp. When compared with the spectrum distribution of natural daylight due to sunlight, FIG. 16 shows a peak in the blue-violet to blue-blue line region of visible light at 380 to 495 nm, and a near-peak around 800 to 1000 nm. The peak in the infrared region is prominent.

[0005] As an effect of light radiation on an object to be irradiated, a phenomenon of accelerated deterioration of plastic due to ultraviolet light is known.
An example of this prevention is shown in FIG. FIG. 17 is a cross-sectional view of a high-pressure discharge lamp of a light source portion of an automobile lamp in which a xenon lamp 2 is used as a high-pressure discharge lamp and an ultraviolet absorbing glass cover 2g is provided around a glass bulb 2a, and has a wavelength of 400 nm or less. Ultraviolet rays are absorbed by the ultraviolet absorbing glass cover 2g to prevent deterioration of the plastic due to ultraviolet light.

Further, there is an example in which an interference film for removing a wavelength in an infrared light range is provided on a reflecting mirror in order to prevent a rise in temperature or the like of an irradiation object.

In addition, when irradiating the skin of an ultraviolet lamp as an arc welding operation or treatment, it is customary to protect the human body by using ultraviolet-cut glasses as a measure under special circumstances.

[0008]

High-pressure discharge lamps, such as high-pressure mercury lamps and high-pressure metal halide lamps, are used for lighting large-scale spaces utilizing their small size, high output, and high efficiency, and have higher color rendering properties than incandescent lamps and halogen lamps. It is often used for store lighting that takes advantage of its advantages.

Recently, xenon lamps based on excitation light emission of xenon gas have been adopted as headlights for vehicles, utilizing not only a point light source and high brightness, but also closer to natural light and instantaneous lighting performance by electronic start control. is there.

In connection with energy saving and aging, a small-capacity xenon lamp having about three times the brightness of a conventional halogen lamp will be used in a familiar area such as lighting for automobiles in the future. Cases are expected to increase.

In particular, in an eyeball that is exposed to this light for a long time in an area of heavy traffic such as an urban area or an expressway, an increase in glare caused by a large amount of visible light components in a short wavelength range, and a black torque calculating means. In addition to the difficulty of seeing the objects in the system, the influence of ultraviolet light or infrared light, the increase of the influence of negative light such as blue light of visible light is expected. As shown in Table 1, these wavelength ranges in which the light radiation affects the eyeball and the skin are as follows with visible light and ultraviolet light having a wavelength of 520 nm or less.
Ultraviolet eye inflammation, erythema, and blue light damage may occur, and infrared radiation of 800 nm or more may cause infrared radiation damage. However, among the wavelength ranges in which the radiation of light to the human body shown in Table 1 occurs, no example has been found in which the countermeasures for preventing blue light or infrared radiation are performed on the vehicle lighting device side.

[0012]

[Table 1]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it has been found that, in the spectral distribution light of a high-pressure discharge lamp such as a xenon lamp, 520 nm or less, which causes ultraviolet ophthalmitis, erythema and blue light damage. It is an object of the present invention to provide a lighting device for an automobile using a high-pressure discharge lamp which removes a wavelength of 800 nm or more that causes an infrared radiation obstacle.

[0014]

According to the present invention, there is provided a lighting device for a vehicle using a high-pressure discharge lamp according to the present invention, a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and a front surface of the reflector. In an automotive lighting device using a high-pressure discharge lamp provided with an irradiation lens provided in a vehicle, a visible light of 520 nm or less and an ultraviolet light region are selectively removed from light generated by the high-pressure discharge lamp. -An ultraviolet light removing means is provided.

Further, the means for removing visible light / ultraviolet light is Au-G.
An e-Sio multilayer interference film is provided on a reflecting mirror.

Further, the visible light / ultraviolet light removing means is provided as a filter in which microcrystals of the II-IV compound semiconductor are dispersed, at least inside or outside the irradiation lens.

Further, the visible light / ultraviolet light removing means is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed.

[0018] Of the light generated by the high pressure discharge lamp, 80
An infrared light removing means for selectively removing an infrared light region of 0 nm or more is provided.

Further, the means for removing visible light and ultraviolet light is provided as a filter in which microcrystals of a II-IV compound semiconductor are dispersed, at least inside or outside the irradiation lens, and the means for removing infrared light is made of MgF ₂ -ZnS. This is a multilayer interference film provided on a reflecting mirror.

The means for removing visible light and ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the means for removing infrared light is MgF _2.
-A ZnS multilayer interference film provided on a reflecting mirror.

A lighting device for a vehicle using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on the front surface of the reflector. In the light generated by the high-pressure discharge lamp, the visible light and the ultraviolet
Visible light, ultraviolet light,
An infrared light removing means is provided.

Further, the means for removing visible light, ultraviolet light and infrared light is a TiO ₂ —SiO ₂ multilayer interference film, which is provided in a high pressure discharge lamp.

Further, the means for removing visible light, ultraviolet light, and infrared light is a TiO ₂ —SiO ₂ multilayer interference film, which is provided at least on one of the inside and the outside of the irradiation lens.

Also, a lighting device for an automobile using a high-pressure discharge lamp comprising a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on the front surface of the reflector. Of the light generated by the high pressure discharge lamp, the visible light and
Visible light / ultraviolet light / infrared light removing means for selectively removing the above infrared light region and visible light / ultraviolet light removing means for selectively removing visible light and ultraviolet light regions of 520 nm or less are provided. It is a thing.

Further, the means for removing visible light / ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the means for removing visible light / ultraviolet light / infrared light is TiO _2- It is a SiO ₂ multilayer interference film provided on at least one of the inside and outside of the filter irradiation lens.

Also, the means for removing visible light, ultraviolet light and infrared light is a TiO ₂ —SiO ₂ multilayer interference film, which is provided in a high-pressure discharge lamp, and the means for removing visible light and ultraviolet light is an Au-Ge-Sio multilayer interference film. , Provided on the reflecting mirror.

Further, the means for removing visible light and ultraviolet light is a filter irradiation lens in which microcrystals of II-IV compound semiconductor are dispersed and a TiO ₂ —SiO ₂ multilayer interference film, and the filter irradiation lens is replaced with an irradiation lens. , The above T
An iO ₂ —SiO ₂ multilayer interference film is provided on a reflecting mirror,
The ultraviolet / infrared light removing means is a TiO ₂ —SiO ₂ multilayer interference film and is provided on at least one of the inside and the outside of the filter irradiation lens.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a first embodiment of the present invention, and shows an application example to a vehicle headlight. In the drawing, reference numeral 1 denotes a lighting device for an automobile, 2 denotes a high-pressure discharge lamp including a glass bulb 2a made of quartz glass, lead wires 2b and 2c, and a light-shielding tube 2d; 3 denotes a holder including an insulating base 3a and lead supports 3b and 3c; Is a start controller composed of a case 4a, an electronic circuit 4b, 5 is a front irradiation lens 5a, a reflection chain 5b having a paraboloid of revolution, an irradiation unit including sealing materials 5c and 5d, 6 is a lamp body 6a, and a mounting screw 6b. And is fixed to a mounting-side structure material such as a car body via a mounting screw 6b. The starting controller 4 controls the starting and lighting of the high-pressure discharge lamp, and excites and emits mercury, a rare gas, and a metal halide sealed in the glass bulb 2a. Reference numeral 5g denotes a visible light / ultraviolet light removing film formed on the surface of the reflecting mirror 5b and formed of, for example, an Au-Ge-SiO multilayer interference film which is a metal and a dielectric.

Here, the reflectance characteristics of the Au-Ge-SiO multilayer interference film with respect to the emission spectrum of the high-pressure discharge lamp 2 will be described with reference to FIG. The emission spectrum of the high-pressure discharge lamp 2 is ultraviolet light, visible light, infrared light, or the like. The Au-Ge-SiO multilayer interference film, which is the visible light / ultraviolet light removing film 5g, has ultraviolet eye inflammation, crimson, and blue light. 520n, which is the wavelength range of ultraviolet light, visible light, and blue light, which is the wavelength range that causes obstacles
The reflectance is reduced in the wavelength range of less than m, and the wavelength range of 520 nm or less is cut by 85%.

With the above configuration, the radiated light from the high pressure discharge lamp 2 is applied to the visible light / ultraviolet light removing film 5g formed on the reflecting mirror 5b.
In the light emission spectrum of the high-pressure discharge lamp 2, the wavelength range of 520 nm or less is selectively removed by 85%, and the parallel beam 5e reflected by the reflecting mirror 5b and converted into a substantially parallel light beam has this wavelength range removed. The object to be irradiated is irradiated through the front irradiation lens 5a.

As described above, it is possible to prevent glare to the eyeball in the irradiation area, and to prevent ultraviolet ophthalmitis, blue light damage, and redness on the skin.

Embodiment 2 FIG. FIG. 3 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a second embodiment of the present invention. In the first embodiment, the front illumination lens 5a
And a visible light / ultraviolet light filter 5h in which a crystal of a II-IV group compound semiconductor such as CdS or CdSe is dispersed. Other configurations are the same as those in FIG. 1 showing the first embodiment, and a description thereof will be omitted.

FIG. 4 shows the visible light / ultraviolet light filter 5h.
The following shows an example of the characteristics of. In the emission spectrum of the high-pressure discharge lamp 2, the transmittance is reduced in a wavelength region of 520 nm or less, which is a wavelength region of ultraviolet, visible light, and blue light, which is a wavelength region that causes ultraviolet lipstick, blue light disturbance, and infrared radiation disturbance. And 520n
The wavelength region below m is cut by 85%.

With this configuration, the radiated light from the high-pressure discharge lamp 2 is applied to the visible / ultraviolet light removing film 5 formed on the reflecting mirror 5b.
In the emission spectrum of the high pressure discharge lamp 2 at b, the parallel beam 5e, which is selectively absorbed in the wavelength range of 520 nm or less and is reflected by the reflecting mirror 5b and becomes almost parallel rays, has this wavelength range removed, and is visible. The light / ultraviolet light absorbing optical glass filter 5h further absorbs the wavelength range of 520 nm or less, and irradiates the object to be irradiated through the front irradiation lens 5a.

As described above, it is possible to prevent glare to the eyeballs in the irradiation area, and to further prevent ultraviolet ophthalmitis, blue light damage and redness on the skin.

The visible light / ultraviolet light filter 5h is installed near the glass bulb 2a of the high pressure discharge lamp 2,
This may be interposed in a surrounding manner.

Embodiment 3 Embodiment 3 FIG. 5 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 3 of the present invention. FIG. 16 shows a conventional example, in which the front irradiation lens 5a of FIG. 16 is replaced with a visible / ultraviolet filter irradiation lens 5i in which a crystal of a II-IV compound semiconductor such as CdS or CdSe is dispersed. The other configuration is the same as that of FIG. 16 and the description is omitted.

With this configuration, the radiated light from the high-pressure discharge lamp 2 is reflected by the reflecting mirror 5b, and the parallel beam 5e, which has become almost parallel, is converted into a visible light / ultraviolet light filter irradiation lens 5i.
Thus, 90% of the wavelength range of 520 nm or less is absorbed, and the object to be irradiated is irradiated.

As described above, by reducing the number of components, it is possible to prevent glare to the eyeball in the irradiation area, and to prevent ultraviolet ophthalmitis, blue light damage, and redness on the skin.

The visible light / ultraviolet filter irradiation lens 5i is made of a conventional material, and a visible light / ultraviolet light filter in which microcrystals of a II-IV compound semiconductor is dispersed is bonded to the outer surface to obtain the same effect. It is also possible.

Embodiment 4 FIG. Embodiment 4 FIG. 6 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 4 of the present invention. On a surface of a glass cover material 2f provided on a surface of a glass bulb 2a of the high-pressure discharge lamp 2 of FIG. 16 showing a conventional example, visible light composed of, for example, a dielectric and a multilayer interference film of TiO ₂ —SiO ₂ as a dielectric is provided. -An ultraviolet light / infrared light removing film 2e is formed. The other configuration is the same as that of FIG. 16 and the description is omitted.

FIG. 7 shows a TiO, which is a visible light / ultraviolet light / infrared light removing film 2e for the emission spectrum of the high pressure discharge lamp 2.
_It shows the reflectance characteristics of the multilayer interference film of _2- SiO ₂ ,
520 is a region of ultraviolet light, visible light, and blue light which is a wavelength region that increases the glare in the light emission spectrum of the high-pressure discharge lamp 2 and that causes ultraviolet ophthalmitis, erythema, and blue light damage.
nm wavelength range and 800 n
The reflectance decreases near the wavelength range of m or more, and cuts 520 nm or less and 800 nm or more by 70 to 80%. This range can be obtained by adjusting the thickness of the multilayer interference film of TiO ₂ —SiO ₂ .

With the above structure, the radiated light from the high-pressure discharge lamp 2 emits the visible light and the visible light formed on the surface of the glass cover material 2f.
The ultraviolet / infrared light removing film 2e selectively absorbs 70 to 80% of both the wavelength range of 520 nm or less and 800 nm or more in the emission spectrum of the high-pressure discharge lamp 2, reflects the light by the reflecting mirror 5b, and is almost parallel. The parallel beam 5e, which has become a light beam, has this wavelength range removed, and irradiates the object to be illuminated via the front illumination lens 5a.

As described above, it is possible to prevent glare to the eyeballs in the irradiation area, and to more widely prevent ultraviolet ophthalmitis, blue light damage, redness on skin, and infrared damage.

The visible light / ultraviolet light / infrared light removing film may be formed directly on the surface of a glass sphere 2a made of, for example, quartz glass without using the glass cover material 2f. Shows an example in which a glass cover material 2f suitable for forming the visible light / ultraviolet light / infrared light removing film 2e is used. Further, it is also possible to give the glass cover member 2f the characteristics of the visible light / ultraviolet light filter shown in FIG.

Embodiment 5 FIG. FIG. 8 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 5 of the present invention. For example, a dielectric material and TiO ₂ —S as a dielectric material are provided on the inner surface of the front-side illumination lens 5a of FIG.
A visible light / ultraviolet light / infrared light removing film 5f formed of an iO ₂ multilayer interference film is formed. Other configurations are shown in FIG.
The description is omitted.

With the above configuration, the radiated light from the high-pressure discharge lamp 2 emits the visible light, which is formed on the surface of the front illumination lens 5a.
The ultraviolet / infrared light removing film 5f selectively absorbs both 70 to 80% of the wavelength range of 520 nm or less and 800 nm or more in the emission spectrum of the high-pressure discharge lamp 2, and irradiates the object to be irradiated.

As described above, it is possible to prevent glare to the eyeballs in the irradiation area, and to more widely prevent ultraviolet ophthalmitis, blue light damage, redness on skin, and infrared light damage.

Embodiment 6 FIG. FIG. 9 is a cross-sectional view of an automotive lighting device using a high-pressure discharge lamp according to a sixth embodiment of the present invention, which is a combination of the third and fifth embodiments and shows a conventional example. Front illumination lens 5a
Is a visible light / ultraviolet light filter irradiation lens 5i in which a II-IV compound semiconductor such as CdS or CdSe is dispersed.
Instead, for example, a dielectric material and TiO ₂ —S which is a dielectric material are provided on the inner surface of the visible / ultraviolet light absorbing front illumination lens 5i.
A visible light / ultraviolet light / infrared light removing film 5f formed of an iO ₂ multilayer interference film is formed.

With this configuration, the radiated light from the high-pressure discharge lamp 2 is reflected by the reflecting mirror 5b, and the parallel beam 5e, which has become almost parallel light, is removed by the visible light / ultraviolet light / infrared light removing film 5f.
The wavelength range of 520 nm or less and 800 nm or more is 70 to 80.
% Are selectively absorbed, and the visible light / ultraviolet light filter irradiation lens 5i has a wavelength range of 520 nm or less of 90%.
% And irradiates the object. Therefore, the visible light / ultraviolet light / infrared light removing film 5f has a removal rate of 520 nm or less of 7%.
Although it is 0 to 80%, the visible light / ultraviolet light filter irradiation lens 5i absorbs 90% of the wavelength range of 520 nm or less.

As described above, ultraviolet ophthalmitis and blue light damage to the eyeball in the irradiation area, and red eye and infrared damage to the skin, etc., and more particularly, ultraviolet ophthalmitis and blue light damage to the eyeball It can better prevent redness on the skin. Also,
It is possible to prevent glare to the eyeball in the irradiation area.

Embodiment 7 FIG. FIG. 10 is a cross-sectional view of an automotive lighting apparatus using a high-pressure discharge lamp according to a seventh embodiment of the present invention, which is a combination of the first and fourth embodiments. For example, a visible light / ultraviolet light removing film made of an Au-Ge-SiO multilayer interference film which is a metal and a dielectric formed on the surface, and 2e is a dielectric and a TiO ₂ -SiO ₂ which is a dielectric on a glass cover material 2f. In which a visible light / ultraviolet light / infrared light removing film made of a multilayer interference film is formed.

With this configuration, the radiated light from the high-pressure discharge lamp 2 emits the visible light and the visible light formed on the surface of the glass cover material 2f.
The ultraviolet / infrared light removing film 2e selectively absorbs 70 to 80% of the wavelength range of 520 nm or less and 800 nm or more in the emission spectrum of the high-pressure discharge lamp 2, and is further formed on the reflecting mirror 5b. The visible light / ultraviolet light removing film 5b selectively absorbs 85% of the wavelength range of 520 nm or less in the emission spectrum of the high pressure discharge lamp 2, and the parallel beam 5e, which is reflected by the reflecting mirror 5b and becomes almost parallel light, has this wavelength. The region is removed, and the object to be irradiated is irradiated via the front irradiation lens 5a.

As described above, ultraviolet ocular inflammation and blue light damage to the eyeball in the irradiation area, and red eye and infrared light damage to the skin, etc. It can better prevent redness on the skin. Also,
It can also prevent glare to the eyeball in the irradiation area.

Embodiment 8 FIG. FIG. 11 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 8 of the present invention. Reference numeral 5h denotes a visible light / ultraviolet light filter 5h in which a II-IV group compound semiconductor such as CdS or CdSe is dispersed in the vicinity of the inner surface of the front irradiation lens 5a. An infrared light removing film made of a ZnS multilayer interference film is formed. Other configurations are the same as those in FIG. 1 showing the first embodiment, and a description thereof will be omitted.

FIG. 12 shows the characteristics of the infrared light removing film 5j. In the emission spectrum of the high-pressure discharge lamp 2, 800, which is an infrared region that is a wavelength region that causes infrared radiation interference.
The reflectance decreases in the wavelength region of nm or more, and the wavelength region of 800 nm or less is cut by 70 to 80%.

With this configuration, the radiated light from the high-pressure discharge lamp 2 can be selectively applied to the wavelength range of 800 nm or more in the emission spectrum of the high-pressure discharge lamp 2 by the infrared light removing film 5j formed on the reflecting mirror 5b. The parallel beam 5e, which is absorbed by about 80% and reflected by the reflecting mirror 5b and becomes almost parallel rays, is further absorbed by the visible light / ultraviolet light filter 5h in a wavelength range of 520 nm or less by 90% and passes through the front illumination lens 5a. To irradiate the object.

As described above, it is possible to more widely prevent ultraviolet ophthalmitis and blue light damage to the eyeball in the irradiation area, and redness and infrared light damage to the skin. Further, it is possible to prevent glare to the eyeball in the irradiation area.

Embodiment 9 Embodiment 9 FIG. 13 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 9 of the present invention. Reference numeral 5i denotes a visible light / ultraviolet light absorbing front irradiation lens in which a crystal of a II-IV group compound semiconductor such as CdS or CdSe is dispersed, and 5j denotes an infrared light removing film made of a MgF2-ZnS multilayer interference film on a reflecting mirror 5b. Is formed.
Other configurations are the same as FIG. 1 showing the first embodiment,
Description is omitted.

With this configuration, the radiated light from the high-pressure discharge lamp 2 is selectively transmitted to a wavelength region of 800 nm or more in the emission spectrum of the high-pressure discharge lamp 2 by the infrared light removing film 5j formed on the reflecting mirror 5b. The parallel beam 5e, which is absorbed by about 80% and is reflected by the reflecting mirror 5b and becomes almost parallel light, is further absorbed by the visible light / ultraviolet light filter irradiation lens 5i in the wavelength region of 520 nm or less by 90%, and the front irradiation lens 5a The object to be irradiated is irradiated through the.

As described above, it is possible to more widely prevent ultraviolet ophthalmitis and blue light damage to the eyeballs in the irradiation area, and erythema and infrared damage to the skin. Further, it is possible to prevent glare to the eyeball in the irradiation area.

Embodiment 10 FIG. FIG. 14 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to Embodiment 9 of the present invention, which is a combination of Embodiments 1 and 6, and 5g is formed on the surface of a reflecting mirror 5b. For example, a visible light / ultraviolet light removing film composed of an Au—Ge—SiO multilayer interference film that is a metal and a dielectric, 5i is a visible light in which a crystal of a II-IV group compound semiconductor such as CdS or CdSe is dispersed. light·
The ultraviolet light filter irradiation lens 5f is provided on the inner surface of the visible / ultraviolet light absorbing front irradiation lens 5i with TiO ₂ -Si.
A visible light / ultraviolet light / infrared light removing film 5f formed of an O ₂ multilayer interference film is formed.

With this configuration, the emitted light from the high-pressure discharge lamp 2 and the emitted light from the high-pressure discharge lamp 2 are selectively removed by 85% of the wavelength range of 520 nm or less by the visible light / ultraviolet light removing film 5g. The parallel beam 5e reflected by the reflecting mirror 5b and converted into a substantially parallel light beam is converted into a visible light / ultraviolet light / infrared light removing film 5f.
The wavelength range of 520 nm or less and 800 nm or more is 70 to
Both 80% are selectively absorbed, and the visible light / ultraviolet light filter irradiation lens 5i absorbs 90% of the wavelength region of 520 nm or less, and irradiates the object.

As described above, ultraviolet ophthalmitis and blue light damage to the eyeball in the irradiation area, and red eye and infrared damage to the skin, etc., and more particularly ultraviolet ophthalmitis and blue light damage to the eyeball In addition, redness on the skin can be even better prevented.
Further, it is possible to prevent glare to the eyeball in the irradiation area.

In the above embodiment, an example of application of a vehicle headlamp has been described. However, the present invention can also be applied to a residential or office lighting device using a high-pressure discharge lamp.

[0066]

Since the present invention is configured as described above, it has the following effects.

An automotive lighting device using a high-pressure discharge lamp according to the present invention includes a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an illumination lens provided on the front surface of the reflector. In a lighting device for an automobile using a high-pressure discharge lamp having, of the light generated by the high-pressure discharge lamp,
Visible light / ultraviolet light removal means for selectively removing visible light and ultraviolet light of 520 nm or less is provided. In addition to preventing glare to the eyeball in the irradiation area, ultraviolet ophthalmitis, blue light damage, and skin Can prevent red rice.

Also, the means for removing visible light / ultraviolet light is Au-G
Since the e-Sio multilayer interference film is provided on the reflecting mirror, it is possible to prevent glare to the eyeball in the irradiation area, ultraviolet ophthalmitis, blue light damage, and redness to the skin.

Further, since the visible light / ultraviolet light removing means is provided as a filter in which microcrystals of II-IV compound semiconductors are dispersed, at least one of the inside and outside of the irradiation lens, it is possible to cover the eyes within the irradiation area. Prevention and UV ophthalmitis,
It can better prevent blue light damage and redness on the skin.

Further, since the visible light / ultraviolet light removing means is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, the number of components can be reduced.
It can prevent glare to the eyeballs in the irradiation area, and prevent ultraviolet ophthalmitis, blue light damage, and redness on the skin.

Also, of the light generated by the high pressure discharge lamp, 80
Since the infrared light removing means for selectively removing the infrared light region of 0 nm or more is provided, ultraviolet ophthalmitis to the eyeball in the irradiation region, blue light damage, reddish skin to the skin, infrared light damage, etc. Can be widely prevented.

The visible light / ultraviolet light removing means is provided on at least one of the inside and the outside of the irradiation lens as a filter in which microcrystals of a II-IV compound semiconductor are dispersed, and the infrared light removing means is made of MgF _2-. Since the ZnS multilayer interference film is provided on the reflecting mirror, it is possible to more widely prevent ultraviolet ophthalmitis and blue light damage to the eyeball in the irradiation area, and reddish and infrared damage to the skin.

Further, the means for removing visible light / ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the means for removing infrared light is MgF _2.
-As a ZnS multilayer interference film, provided on the reflector, to prevent glare to the eyeballs in the irradiation area, ultraviolet ophthalmitis, blue light damage, skin redness, infrared light damage, etc. Can be.

A lighting device for a vehicle using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on the front surface of the reflector. In the light generated by the high-pressure discharge lamp, the visible light and the ultraviolet
Visible light, ultraviolet light,
Since infrared light removing means is provided, ultraviolet ophthalmitis to the eyeball in the irradiation area, blue light damage, redness to the skin, infrared damage, etc.
It can be prevented more widely.

Further, since the visible light / ultraviolet light / infrared light removing means is a TiO ₂ —SiO ₂ multilayer interference film and is provided in the high pressure discharge lamp, it is possible to prevent glare to the eyeball in the irradiation area, and to prevent ultraviolet eye inflammation. It is possible to prevent blue light damage, skin rash and infrared damage more widely.

Further, since the visible light / ultraviolet light / infrared light removing means is a TiO ₂ —SiO ₂ multilayer interference film and is provided on at least one of the inside and outside of the irradiation lens, it is possible to prevent glare to the eyeball in the irradiation area. In addition, UV ophthalmitis, blue light damage, skin erythema, infrared damage and the like can be more widely prevented.

A lighting device for a vehicle using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on the front surface of the reflector. Of the light generated by the high pressure discharge lamp, the visible light and
Visible light / ultraviolet light / infrared light removing means for selectively removing the above infrared light region and visible light / ultraviolet light removing means for selectively removing visible light and ultraviolet light regions of 520 nm or less are provided. Therefore, ultraviolet ophthalmitis to the eyeballs in the irradiation area, blue light damage, redness to the skin, infrared damage, etc., more widely, especially to prevent glare to the eyeballs, ultraviolet ophthalmitis, blue light damage It can better prevent redness on the skin.

Further, the means for removing visible light / ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the means for removing visible light / ultraviolet light / infrared light is TiO _2- Since the SiO ₂ multilayer interference film and provided at least one of the inside or outside of the filter irradiation lens, ultraviolet ophthalmitis to the eyeball in the irradiation area, blue light damage, skin redness, infrared damage, etc. Widely, in particular, it can better prevent glare to the eyes, ultraviolet ophthalmitis, blue light damage, and redness to the skin.

Further, the means for removing visible light, ultraviolet light and infrared light is a TiO ₂ —SiO ₂ multilayer interference film, which is provided in a high-pressure discharge lamp, and the means for removing visible light and ultraviolet light is an Au-Ge-Sio multilayer interference film. , Because it is provided on the reflector, it is more widespread, such as ultraviolet ophthalmitis and blue light damage to the eyeball in the irradiation area, redness and infrared damage to the skin, especially to prevent glare to the eyeball and ultraviolet ophthalmitis , Blue light disorders and redness on the skin can be better prevented.

The means for removing visible light / ultraviolet light is a filter irradiation lens in which microcrystals of II-IV compound semiconductor are dispersed and a TiO ₂ —SiO ₂ multilayer interference film, and the filter irradiation lens is replaced with an irradiation lens. The TiO ₂ —SiO ₂ multilayer interference film is provided on a reflecting mirror, the visible light / ultraviolet light / infrared light removing means is a TiO ₂ —SiO ₂ multilayer interference film, and is provided on at least one of the inside and the outside of the filter irradiation lens. Because it is provided, it is more widespread, such as ultraviolet ophthalmitis and blue light damage to the eyeballs in the irradiation area, redness and infrared damage to the skin, especially to prevent glare to the eyeballs, ultraviolet ophthalmitis, blue light damage Thus, redness on the skin can be even better prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an automotive lighting device using a high-pressure discharge lamp according to a first embodiment of the present invention.

FIG. 2 is a reflection characteristic diagram of a visible light / ultraviolet light removing film according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a vehicle lighting device using a high-pressure discharge lamp according to a second embodiment of the present invention.

FIG. 4 is a transmission characteristic diagram of an optical glass filter material according to Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view of an automotive lighting device using a high-pressure discharge lamp according to a third embodiment of the present invention.

FIG. 6 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a fourth embodiment of the present invention.

FIG. 7 is a reflection characteristic diagram of a visible light / ultraviolet light / infrared light removing film according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a fifth embodiment of the present invention.

FIG. 9 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a sixth embodiment of the present invention.

FIG. 10 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a seventh embodiment of the present invention.

FIG. 11 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to an eighth embodiment of the present invention.

FIG. 12 is a reflection characteristic diagram of the infrared light removing film according to the eighth embodiment of the present invention.

FIG. 13 is a sectional view of an automotive lighting device using a high-pressure discharge lamp according to a ninth embodiment of the present invention.

FIG. 14 is a cross-sectional view of a vehicle lighting device using a high-pressure discharge lamp according to a tenth embodiment of the present invention.

FIG. 15 is a cross-sectional view of a lighting device for a vehicle using a conventional high-pressure discharge lamp.

FIG. 16 is a light emission spectrum distribution diagram when a xenon lamp is used as a high-pressure discharge lamp.

FIG. 17 is a sectional view of a conventional high-pressure discharge lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Illumination device for automobiles, 2 High pressure discharge lamp, 2a Glass ball, 2e Visible light / ultraviolet light / infrared light removal film, 2f Glass cover material, 5a Front illumination lens, 5b Reflecting mirror, 5
e Parallel beam, 5f Visible light / ultraviolet light / infrared light removing film, 5g visible light / ultraviolet light removing film, 5h visible light / ultraviolet light filter, 5i visible light / ultraviolet light filter irradiation lens, 5j infrared ray removing film.

Claims (14)

[Claims] 1. An automotive lighting device using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on a front surface of the reflector. An automobile using a high pressure discharge lamp, further comprising: a visible light / ultraviolet light removing means for selectively removing visible light of 520 nm or less and ultraviolet light from light generated by the high pressure discharge lamp. Lighting equipment. 2. The method according to claim 1, wherein the visible light / ultraviolet light removing means is Au-Ge-
The lighting device for a vehicle using a high pressure discharge lamp according to claim 1, wherein the Sio multilayer interference film is provided on the reflecting mirror. 3. The device according to claim 2, wherein the visible light / ultraviolet light removing means is provided as a filter in which microcrystals of a II-IV compound semiconductor are dispersed, at least one of inside and outside of the irradiation lens. Automotive lighting device using high-pressure discharge lamp. 4. The high pressure discharge lamp according to claim 1, wherein the means for removing visible light and ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed. Car lighting system. 5. The light generated by the high-pressure discharge lamp is 800 n.
2. An automotive lighting device using a high pressure discharge lamp according to claim 1, further comprising an infrared light removing means for selectively removing an infrared light region of m or more. 6. A visible light / ultraviolet light removing means is provided as a filter in which microcrystals of a II-IV compound semiconductor are dispersed on at least one of the inside and outside of the irradiation lens, and the infrared light removing means is MgF ₂ -ZnS. The lighting device for a vehicle using a high-pressure discharge lamp according to claim 5, wherein the lighting device is a multilayer interference film and is provided on a reflecting mirror. 7. The visible light / ultraviolet light removing means is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the infrared light removing means is MgF ₂ -Z.
6. An automotive lighting device using a high-pressure discharge lamp according to claim 5, wherein the nS multilayer interference film is provided on a reflecting mirror. 8. An automotive lighting device using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on a front surface of the reflector. In the above, a visible light / ultraviolet light / infrared light removing means for selectively removing visible light and ultraviolet light of 520 nm or less and infrared light of 800 nm or more of the light generated by the high pressure discharge lamp is provided. An automotive lighting device using a high-pressure discharge lamp provided. 9. The method for removing visible light / ultraviolet light / infrared light using Ti
O ₂ -SiO ₂ a multilayer interference film, automotive lighting apparatus using a high-pressure discharge lamp according to claim 8, characterized in that provided in the high pressure discharge lamp. 10. A means for removing visible light, ultraviolet light and infrared light,
iO ₂ -SiO ₂ a multilayer interference film, automotive lighting apparatus using a high-pressure discharge lamp of the inside or outside according to claim 8, characterized in that provided on at least one of the illumination lens. 11. An automotive lighting device using a high-pressure discharge lamp including a high-pressure discharge lamp, a reflector for reflecting light generated by the high-pressure discharge lamp, and an irradiation lens provided on the front surface of the reflector. , A visible / ultraviolet / infrared light removing means for selectively removing visible light of 520 nm or less and ultraviolet light and infrared light of 800 nm or more out of the light generated by the high pressure discharge lamp; An automotive lighting device using a high-pressure discharge lamp, comprising: a visible light / ultraviolet light removing means for selectively removing visible light and ultraviolet light in the following range. 12. The means for removing visible light / ultraviolet light is replaced with an irradiation lens as a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed, and the means for removing visible light / ultraviolet light / infrared light is TiO _2-. The lighting device for a vehicle using a high-pressure discharge lamp according to claim 11, wherein a SiO ₂ multilayer interference film is provided on at least one of the inside and outside of the filter irradiation lens. 13. A method for removing visible light, ultraviolet light, and infrared light by using T
iO ₂ —SiO ₂ multilayer interference film, provided in high pressure discharge lamp,
The lighting device for a vehicle using a high-pressure discharge lamp according to claim 11, wherein the visible light / ultraviolet light removing means is an Au-Ge-Sio multilayer interference film and is provided on a reflecting mirror. 14. A visible light / ultraviolet light removing means comprising a filter irradiation lens in which microcrystals of a II-IV compound semiconductor are dispersed and a TiO ₂ —SiO ₂ multilayer interference film, wherein said optical glass filter is replaced by an irradiation lens. , The above Ti
The O ₂ -SiO ₂ multilayer interference film is provided on the reflecting mirror, visible light, ultraviolet and infrared light removal means and TiO ₂ -SiO ₂ multilayer interference film, provided on at least one of the inner or outer side of the filter illumination lens An automotive lighting device using the high-pressure discharge lamp according to claim 11.