JP2000084682A - Laser texture device - Google Patents

Abstract

(57) [Problem] With a simple optical system configuration, even if characteristics such as a means for splitting a laser beam from a laser light source change due to heat or other external influences, uniformity can be obtained on both sides of the disk. Form bumps with high precision. SOLUTION: After rotating a polarization plane of a laser beam from a laser light source 20 by an isolator 45 °,
After the light amount is adjusted by the ND filter 22 and the optical deflector 23, the diameter is expanded by the beam expander 24, and the light beam is converted into a parallel light beam, the light beam is split into the P-polarized light path portion 15 P and the S-polarized light path portion 15 S by the polarizing beam splitter 26. ,
A λ / 2 wavelength plate 27 is provided before the polarization beam splitter 26. Beam samplers 29P and 29S and power detectors 30P and 30S are provided in an optical path from the polarizing beam splitter 26 to the objective lens units 28P and 28S, and the entire light quantity is adjusted by the optical deflector 23.
By adjusting the angle of the λ / 2 wavelength plate 27, the power ratio between the P-polarized component and the S-polarized component changes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser texturing apparatus for irradiating a laser pulse to a limited CSS area on both sides of a magnetic disk to perform texture processing. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser texturing apparatus which can perform uniform texturing on both front and back surfaces of a disk using the same.

[0002]

2. Description of the Related Art A magnetic disk drive device has a spindle for rotating a magnetic disk (hereinafter, simply referred to as a disk). During rotation of the disk by the spindle, a magnetic head faces a disk surface at a predetermined gap. In this state, writing and reading of information are performed. The operation of the magnetic head at this time is as follows. First, when the disk is stationary, the magnetic head is brought into contact with a predetermined position on the disk surface, and when the disk starts to rotate, the magnetic head slides on the disk surface, increasing the rotation speed. While the number of rotations is constant, the airflow generated between the magnetic head and the disk stably floats the magnetic head with a predetermined gap with respect to the disk surface. The magnetic head levitated in this way is displaced to the data recording area,
Writing and reading of information are performed. Further, when the rotation of the disk is stopped, the magnetic head is moved to a predetermined position again, and when the levitation force due to the decrease in the rotation speed of the disk is reduced, the magnetic head slides on the disk surface, and when the disk stops, the magnetic head slides at that position. It becomes stationary.

The above-described operation method of the magnetic head is called a contact start and stop (CSS) method. Therefore, the magnetic head is stationary on the surface of the disk in addition to the data recording area where information is written and read. A CSS region that is maintained in a state is formed. Here, the CSS area is an area provided with minute projections for smooth floating of the magnetic head with low friction, and is usually formed in an annular shape having a predetermined width near the inner peripheral edge of the disk. You. The texture processing is a surface processing of a disk for forming minute projections in the CSS region thus limited.

In performing texture processing on a CSS area, it is necessary to form projections having minute and uniform shapes with extremely high precision. If the processing accuracy is poor, the so-called CSS such as that the magnetic head does not float smoothly during the floating operation, sticks up on the disk surface, or increases the friction between the magnetic head and the disk surface when shifting to the stationary state. Operational smoothness will be impaired. In particular, in recent years, in order to improve the magnetic recording density, the magnetic head is lifted from the disk by an extremely small amount. Therefore, the precision of the texture processing is further improved, and the protrusions are made finer and uniform. There is a need.

[0005] Texture processing is performed not only for the CSS area described above but also for improving the magnetic orientation over the entire disk surface. In this case, the polishing is generally performed by tape polishing. Therefore, CS
The processing by the tape polishing can be adopted for the processing of the S region. As a disk surface processing method, there is a method by chemical etching or the like. However, texture processing using laser light, that is, a laser texture method, is most advantageous for performing high-precision partial processing on a limited area on the disk surface such as the CSS area.

[0006] The laser texture device is provided with a laser light irradiating means including a laser light source and an objective lens. The disk is mounted on a spindle means, and the laser light irradiating means is rotated while the disk is driven to rotate by the spindle means. , A laser pulse is emitted, and the laser beam is narrowed by an objective lens so as to have a predetermined spot diameter, and is irradiated on the disk surface. Therefore, the surface of the disk is locally heated by the energy of the laser beam applied to the surface of the disk, and the vicinity of the surface of the disk is softened or melted and minute projections (hereinafter referred to as bumps). Is formed.

The CSS area has a limited width on the surface of the disk and is formed on the inner peripheral side of the disk.
In the processing, a laser pulse is irradiated at a predetermined pitch interval in the rotation direction by rotating the disk, and the irradiation position of the laser light is moved in the radial direction of the disk.
As a result, spiral bumps are formed on the disk surface, and a texture zone having a predetermined width is formed on the disk surface. Therefore, at least the objective lens can be moved while the disk is rotated by the spindle means.
When facing the inner edge of the region (the emission start end position)
By controlling the number of rotations of the disk and the pulse interval of the irradiated laser pulse from the start of the emission of the laser pulse to the end on the outer circumference side (the emission end position), the inner circumference of the disk is controlled. The bumps are formed at a desired pitch interval in a predetermined region limited to the above.

The CSS region is a region where the magnetic head comes into contact with the magnetic head in a stationary state, and the bumps which come into direct contact with the magnetic head need to be formed with a uniform projection height and a uniform pitch. In order to form an appropriate bump, the power of the laser pulse from the laser light source constituting the laser beam irradiation means must be constant, and the disk must be arranged at a position where the objective lens is in focus. If the laser power is lower than the set value, a bump with a sufficient height will not be formed, and if the laser power is extremely reduced, the bump itself will not be formed. On the other hand, if the disc is shifted from the focal position of the objective lens and is in a so-called defocus state, even if a laser of a predetermined power is irradiated from a laser light source, it is still impossible to form an accurate bump.

Since writing and reading of data are performed on both sides of a magnetic disk, the above-described texture processing must be performed on both sides of the disk. And the shape of the bump to be formed is, of course,
It must be substantially uniform on both sides. To texture both the front and back surfaces, there is a method in which one side of a disk is processed first, and then the disk is turned over to process the opposite side. In this method, processing can be performed on both the front and back surfaces of the disk under substantially the same conditions, so that uniformity of the processing on the front and back surfaces can be ensured. However, there is a problem that a reversing mechanism of the disk is required and the processing time is long.

As another method for simultaneously processing the surface, two sets of laser light irradiation mechanisms from a laser light source to an objective lens are used, and the two sets are arranged to face each other on the front and back surfaces of the disc, and the disc is rotated. However, there is also a method of processing both the front and back surfaces simultaneously. However, there is a problem that not only the device configuration becomes large, but also that the powers of the laser beams from both laser beam irradiation mechanisms need to be accurately matched, and the adjustment becomes extremely troublesome.

If a beam splitter is used, at least the laser light source can be used for both front and back processing. As a method of dividing the optical path of the laser light from the laser light source into two using the beam splitter in this way, for example, a method disclosed in Japanese Patent Application Laid-Open No. Hei 10-91947 is conventionally known. FIG. 4 shows an optical configuration of this known texture device.

In FIG. 1, reference numeral 1 denotes a laser light source, and an isolator 2 is provided in an optical path of a laser beam from the laser light source 1. The laser beam transmitted through the isolator 2 enters a beam splitter 3, and The beam is split by the beam splitter 3 into two optical paths of transmission and reflection. The two light paths branched in this way are provided with parallel light beam forming means 4a and 4b composed of beam expanders, and the laser beams converted into parallel light beams by these parallel light beam forming means 4a and 4b are ND filters 5a and 5b. , The light amount is adjusted. Furthermore, N
Electromagnetic shutters 6a and 6b for controlling the start and end of the texture are provided in front of the D filters 5a and 5b, and objective lenses 7a and 7b are provided in front of the electromagnetic shutters 6a and 6b.
Is provided.

With the above configuration, the disk 8 is arranged between the objective lenses 7a and 7b so that laser pulses are emitted from the laser light source 1 from a predetermined position, and the electromagnetic shutters 6a and 6b are opened. Then, the formation of bumps from predetermined positions on both the front and back surfaces of the disk 8 is started. By moving the objective lenses 7a and 7b in the radial direction with the rotation of the disk 8, bumps having a predetermined width are formed on the disk 8. Further, when reaching the processing end position, the electromagnetic shutters 6a and 6b are closed. Thus, texture processing is performed on both the front and back surfaces of the disk 8.

[0014]

By the way, it is necessary to form bumps of substantially the same shape on both the front and back surfaces of the disk. To this end, if the powers of the laser beams emitted from the objective lenses are not equal, respectively. No. Since the beam splitter for splitting the laser beam splits the light into transmitted light and reflected light, the light amounts are set to be exactly equal, so that the powers in the two optical paths are equal, but the entire optical device is It is inevitable that an assembling error occurs, which may cause a slight loss of balance between the two optical paths. In addition, the characteristics of the beam splitter change due to the influence of heat, and as a result, the distribution ratio of the light amount in the beam splitter may change. As described above, it is impossible to always irradiate the laser beam of the same power to both the front and back surfaces of the disk only with the beam splitter. Further, since the parallel beam forming means and the ND filter are arranged in each of the branched optical paths, the optical configuration becomes complicated, and the configuration of the laser texture device as a whole becomes large. is there.

The present invention has been made in view of the above points, and its object is to provide a simple optical configuration.
An object of the present invention is to make it possible to form uniform bumps on both sides of a disk.

[0016]

In order to achieve the above-mentioned object, the present invention comprises mounting a disk on a spindle,
By irradiating laser pulses from a laser light irradiating means including a laser light source and an objective lens to both surfaces of the disk at predetermined pitch intervals while rotating the disk with this spindle, the disk can be regulated over a predetermined range on both front and back surfaces of the disk. A laser texture device for forming a periodic projection, one laser light source, polarization plane control means for rotating the polarization plane of a laser beam composed of linearly polarized light from the laser light source by 45 °, and this polarization plane control means Dimming means provided on the output side of the light-emitting element, spectral means for dividing the laser beam whose light amount has been adjusted by the light adjusting means into two light fluxes according to the polarization component, and two light paths provided by the light-separating means Laser power detecting means, and a laser beam by the dimming means based on detection signals from both laser power detecting means. It is characterized in that it is arranged on the input side of the spectral means and adjusts the ratio of two polarized components divided by the spectral means with a λ / 2 wavelength plate while adjusting the total light quantity. is there.

Here, the polarization plane control means can be constituted by an isolator for blocking return light to the laser light source. The dimming means can be constituted by an optical modulator, an optical deflector, a liquid crystal, or the like. A beam expander for expanding the laser beam so as to have a predetermined beam diameter and for converting the laser beam into a parallel light beam. The beam expander may be provided on the output side of the light control means. Further, the spectroscopic means can be constituted by, for example, a polarizing beam splitter.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 10 denotes a disk. The disk 10 has a data recording area 10D and a CSS in which a magnetic head (not shown) is stationary.
Region 10C is formed. The CSS area 10C is formed in an annular shape near the inner periphery of the disk 10, as indicated by hatching in FIG. It is this CSS area 10C that is subjected to surface processing by laser texture. Further, by this texture processing, minute protrusions having the shape shown in FIG. 2 are formed on the surface of the disk 10 in the CSS region 10C. One unit of the minute projection is called a bump 11. However, the bumps formed on the surface of the disk 10 have various shapes according to the material of the disk, the power of the laser beam, the diameter of the focused spot, and the like, in addition to the shape shown in FIG.

FIG. 3 shows the overall configuration of an apparatus for performing laser texture processing. As is apparent from this figure, the processing apparatus is provided with a spindle means 1 for rotating and driving the disk 10.
2 and a laser beam irradiation means 13 for irradiating the surface of the disk 10 with a laser beam. The laser beam irradiation means 13 can simultaneously perform texture processing on both surfaces of the disk 10. Spindle means 1
The disk 2 is rotationally driven at a predetermined speed by detachably clamping the inner diameter of the disk 10.

The laser beam irradiation means 13 comprises a common optical path section 14, a P-polarized optical path section 15P and an S-polarized optical path section 15S. The common optical path section 14 includes a laser light source 20, an isolator 21, an ND filter 22, and an optical deflector 23.
And a beam expander 24. As the laser light source 20, for example, a YAG laser having an oscillation frequency of 1064 nm or the like and performing pulse oscillation is preferably used. When a continuous oscillation laser light source is used, a pulse generator is provided in the middle of the common optical path section 14.

The isolator 21 is composed of, for example, a Faraday rotation type, and its original function is to prevent return light from the disk 10 from entering the laser light source 20. Then, the polarization plane of the linearly polarized laser beam emitted from the laser light source 20 is rotated by 45 ° Faraday by the action of the Faraday rotator in the isolator 21, and the isolator 21 also functions as a polarization plane control unit. Also,
On the output side of the isolator 21, an ND filter 22 and an optical deflector 23 are arranged as dimming means. The ND filter 22 constitutes a fixed light amount adjusting means. This is for roughly lowering to a predetermined level in advance. on the other hand,
The optical deflector 23 is for exerting a variable light amount adjusting function, and includes an acousto-optical type, an electro-optical type, a magneto-optical type, and the like.
Various optical deflectors can be used, and an optical modulator such as an electro-optic optical modulator, a liquid crystal, or the like can also be used.
In short, what is necessary is just to change the laser power continuously by inputting an electric signal without changing the polarization direction of the input laser beam.

The laser beam whose light intensity has been adjusted by the dimming means including the optical deflector 23 so that the output power is at a desired level is reflected on the reflection mirrors 25a and 25b, thereby diverting the optical path of the common optical path section 14. After that, it is incident on the beam expander 24. Beam expander 2
Numeral 4 is for increasing the beam diameter of the laser beam and converting it into a parallel light beam. In order to increase the beam diameter in this manner, the objective lens units 28P and 28S described later are used.
Thus, the diameter of the laser spot on the disk 10 is reduced so as to be smaller.

As described above, the light amount of the laser beam from the laser light source 20 is adjusted, the diameter of the laser beam is expanded, and the laser beam is converted into a parallel light beam. Here, the laser beam input to the spectroscopic means is
Since the light is linearly polarized light having a polarization plane of 45 °, a polarizing beam splitter 26 that can substantially separate the two polarized components of P and S by 100% is used as the spectral unit. Accordingly, in the laser beam incident on the polarizing beam splitter 26, one of the two linearly polarized light components described above passes through the polarizing beam splitter 26, and the other polarized light component is reflected. As a result, the P-polarized light path 1
It is divided into a P-polarized light component toward 5P and an S-polarized light component toward the S-polarized light path 15S. Here, the P-polarized light path 15
The power of the P-polarized light component at P and the power of the S-polarized light component at the S-polarized light path section 15S must be the same. For this purpose, before the polarization beam splitter 26 constituting the spectral means,
A λ / 2 wavelength plate 27 is provided to make the power ratios equal.

The light of the P-polarized light component from the polarizing beam splitter 26 passes through the P-polarized light path 15P, and the light of the S-polarized light passes through the S-polarized light path 15S.
Irradiation is performed on both the front and back surfaces of the disk 10 via P and 28S so as to have a predetermined spot diameter. Here, if the power of the laser beam passing through the P-polarized light path 15P and the S-polarized light path 15S is not strictly controlled, an accurate bump 11 cannot be formed. Therefore, the objective lens units 28P and 2P are output from the polarizing beam splitter 26.
Beam samplers 29P and 29S are interposed in the optical path leading to 8S, and the beam samplers 29P and 29S sample the light so as to reflect a light amount of about several to tens of percent. And this bee
The light reflected by the samplers 29P and 29S is taken into the power detectors 30P and 30S composed of photoelectric conversion elements, and the power is measured. In the drawing, reference numeral 25c denotes a reflection mirror for directing the reflected light from the polarizing beam splitter 26 in an optical path in a direction parallel to the transmitted light.

The λ / 2 wavelength plate 27 provided in front of the polarization beam splitter 26 can be driven to rotate by the rotation driving means 31. By rotating the λ / 2 wavelength plate 27, the laser beam The polarization direction vector can be changed. Therefore,
The power ratio between the P-polarized light component and the S-polarized light component of the polarized light components transmitted through the λ / 2 wavelength plate 27 changes according to the rotation angle of the λ / 2 wavelength plate 27.

The power detectors 30P and 30S detect the powers of the laser beams passing through the P-polarized light path 15P and the S-polarized light path 15S, respectively. And are adjusted so that the powers are equal to each other. Therefore, first, the light amount of the laser beam as a whole is adjusted. In order to adjust the total amount of light, a light control means including an ND filter 22 and a light deflector 23 is provided, and the light deflector 23 among these light control means constitutes a variable light control means. Therefore, by changing the electric signal to the optical deflector 23 based on the signals from the power detectors 30P and 30S, the light amount of the entire laser beam can be adjusted.

Moreover, even if the light amount of the laser beam as a whole is adjusted, if the polarization beam splitter 26 separates the P-polarized light component and the S-polarized light component and their powers are not uniform, the front and back surfaces will be different. The shape of the bump 11 to be formed differs. The reason why the λ / 2 wavelength plate 27 is disposed in front of the polarization beam splitter 26 is that the power ratio is adjusted so that the power of the laser beam split into the two optical paths 15P and 15S by the polarization beam splitter 26 becomes equal. It is to control.

For this purpose, a control means 32 is provided. Detection signals from the power detectors 30P and 30S are taken into the control means 32, and the total light amount level by the two power detectors 30P and 30S is adjusted to a predetermined value. If there is a difference between the set value and the difference, a light amount adjustment signal is input from the control means 32 to the optical deflector 23, and the light amount on the output side is adjusted to be constant. If there is a difference in the detection level between the power detectors 30P and 30S,
From the control means 32 to the rotation driving means 31 of the λ / 2 wavelength plate 27
The λ / 2 wavelength plate 27 is rotated in an appropriate direction when a ratio adjustment signal is input to the two optical paths 15.
Control is performed so that the powers of the laser beams divided into P and 15S become equal.

Further, the objective lens units 28P, 28
The optical paths leading to S are parallel to each other and
To irradiate the laser beam on both sides of the
° Need to change. Moreover, C in the disk 10
The SS area 10C is located on the inner circumference side, and the spindle means 12 clamps the inner circumference of the disk 10.
Therefore, the optical path to the disk 10, particularly the optical path to the back side of the disk 10, must not interfere with the spindle unit 12. Therefore, the optical paths of the laser beams emitted from the objective lens units 28P and 28S are bent by 90 ° by the reflection mirrors 33P and 33S.

By using the texture processing apparatus constructed as described above, the disk 10 is mounted on the spindle means 12 and while the disk 10 is being rotated, the laser pulse is irradiated by the laser light irradiating means 13. By moving the irradiation spot in the radial direction of the disk 10, texture processing is applied to the CSS regions 10C on both the front and back surfaces of the disk 10. By moving the laser beam irradiating means 13 in the radial direction of the disk 10 by driving means (not shown) during this time, the bumps 11 are formed in a spiral state over a predetermined width on both the front and rear surfaces of the disk 10.

The bumps 11 formed in the CSS regions 10C on both the front and back surfaces of the disk 10 are, for example, minute projections having the shape shown in FIG. 2, 11H is the bump height, 11D is the pitch interval, and is textured. Is performed accurately, bumps 11 having a uniform height 11H are formed simultaneously on both sides of the CSS region 10C at a constant pitch 11D. Here, pitch interval 11
D is determined by the rotation speed of the disk 10 and the pulse interval. Therefore, the disk 1 by the spindle means 12
It is necessary to keep the rotation speed of 0 constant.

The height of the bump 11 depends on the spot diameter of the laser beam to be irradiated on the disk 10 and the laser power. The control of the spot diameter is primarily determined by the objective lens units 28P and 28S. That is, the front and back surfaces of the disk 10 must always be located at the focal positions of the objective lenses in the objective lens units 28P and 28S. Objective lens unit 2
By configuring the 8P and 28S with an autofocus mechanism, even if the relative distance between the front and back surfaces of the disk 10 and the objective lens units 28P and 28S changes, the focus can be adjusted by the autofocus mechanism. Can be.

The objective lens units 28P, 28S
The diameter of the spot irradiated on the disc 10 is also affected by the beam diameter of the incident light. The beam diameter of the laser beam is controlled by the beam expander 24. Since the beam expander 24 is provided in the common optical path section 14, the beam expander 24 is also provided in the P-polarized optical path section 15P for processing one side surface of the disk 10. The same beam diameter is obtained in the S-polarized light path section 15S for processing the other side surface.

The laser beam applied to the front and back surfaces of the disk 10 is split by the polarizing beam splitter 26.
The P-polarized light component traveling toward the P-polarized light path portion 15P and the S-polarized light component traveling toward the S-polarized light path portion 15S are set to be equal and have a predetermined power. By the way, the characteristics of the optical components constituting the laser beam irradiation means 13 slightly change due to the influence of heat or the like. When the characteristics of the polarization beam splitter 26 change due to the influence of heat or the like, a difference occurs between the power of the laser beam directed to the P-polarized light path 15P and the power of the laser beam directed to the S-polarized light path 15S. However, in the P-polarized light path section 15P and the S-polarized light path section 15S, the laser power is set at a position immediately before the objective lens units 28P and 28S, that is, at a position where no optical component whose characteristics change due to heat in the subsequent optical path is arranged. Power detector 30P,
Since the detection is performed at 30S, the power of the laser beam actually applied to both the front and back surfaces of the disk 10 is detected.
Then, based on the detection signals from the power detectors 30P and 30S, the optical deflector 23 makes the total light amount constant, and the λ / 2 wavelength plate 27 makes the P-polarized light path portion 15
Feedback control is performed so that the laser powers of the P and S polarization optical path sections 15S become equal. As a result, the power of the laser beam applied to the disk 10 is always constant, and the laser beam of the same power can be applied to both the front and back surfaces.

The laser light source 20, the isolator 21, the ND filter 22 and the optical deflector 23, which constitute the dimming means, of the optical parts constituting the laser
Since the two-wavelength plate 27 and the polarization beam splitter 26 are arranged in the common optical path section 14, the optical system configuration of the laser beam irradiation means 13 as a whole is simplified. Moreover, the P-polarized light path 15P and the S-polarized light path 1
5S, beam samplers 29P, 29S and power detectors 30P, 30P for measuring laser power.
S and P-polarized light path unit 15P and S-polarized light path unit 1, respectively.
5S, these power detectors 30P, 30S
, And the ratio of the laser power between the P-polarized light path 15P and the S-polarized light path 15SP is individually controlled based on the detection signal from The power of the beam can be adjusted very precisely.

[0036]

Since the present invention is constructed as described above, even if the characteristics of the laser beam from the laser light source are changed due to heat or other external influence with a simple optical system configuration, This has the effect that uniform bumps can be formed on both sides of the disc with high precision.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a processing area of a magnetic disk.

FIG. 2 is an explanatory diagram showing an example of a bump formed by texture processing.

FIG. 3 is an optical system configuration diagram of a laser texture device showing an embodiment of the present invention.

FIG. 4 is an optical system configuration diagram of a conventional laser texture device.

[Explanation of symbols]

10 Disc 10C CSS
Area 10D Data recording area 11 Bump 12 Spindle means 13 Laser light irradiation means 14 Common light path section 15P P polarization light path section 15S S polarization light path section 20 Laser light source 21 Isolator 22 ND filter 23 Optical deflector 24 Beam expander 26 Polarizing beam splitter 27 λ / 2 wavelength plate 28P, 28S Objective lens unit 29P, 29S
Beam sampler 30P, 30S Power detector 31 Rotation driving means 32 Control means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masatoshi Soto 3-16-3 Higashi, Shibuya-ku, Tokyo F-term within Hitachi Electronics Engineering Co., Ltd. 4E068 AG00 CA02 CA07 CB10 CD04 5D112 AA24 GA03 GA19

Claims (4)

[Claims] 1. A disk is mounted on a spindle, and a laser pulse from a laser light irradiation means including a laser light source and an objective lens is applied to both surfaces of the disk at predetermined pitch intervals while rotating the disk by the spindle. A laser texture device that forms regular projections over a predetermined range on both the front and back surfaces of a disk by rotating one laser light source and a polarization plane of a laser beam composed of linearly polarized light from the laser light source by 45 ° Polarization plane control means, dimming means provided on the output side of the polarization plane control means, spectral means for dividing the laser beam, the light amount of which has been adjusted by the dimming means, into two luminous fluxes in accordance with the polarization component; Laser power detecting means provided on two optical paths separated by the means, respectively, and detecting by the two laser power detecting means. The light amount of the laser beam is adjusted by the light control means based on the signal, and the power ratio of the two polarization components divided by the light separation means is arranged on the input side of the light separation means. A laser texture device having a configuration for adjusting. 2. The laser texture apparatus according to claim 1, wherein said polarization plane control means comprises an isolator for blocking return light to said laser light source. 3. The dimming means comprises an optical modulator, an optical deflector or a liquid crystal. At the output side of the dimming means, a laser beam is expanded so as to have a predetermined beam diameter and a parallel light beam is emitted. 2. The laser texture apparatus according to claim 1, wherein a beam expander for converting the laser texture is arranged. 4. The laser texture apparatus according to claim 1, wherein said spectral means comprises a polarizing beam splitter.