CN211291747U - A calibration device for a color analyzer - Google Patents

Abstract

The utility model discloses a calibration device for a color analyzer, which comprises an integrating sphere, a light source module, a diaphragm, a device to be measured and a guide rail; the integrating sphere comprises a cavity sphere, and the cavity sphere is provided with a light outlet and a light inlet hole. The light inlet holes are evenly distributed on the circumference of the cavity sphere, and a light source module for providing incident light is embedded in the light inlet hole; the light source module is a uniform light source module with adjustable color temperature and brightness, and the light source module is electrically connected with the controller; A guide rail is extended from the bottom to the side where the light outlet is opened, and the guide rail is provided with a diaphragm and a device to be tested. Adjust the brightness and color temperature of the light source module to provide the device under test with a stable and uniform light source with different brightness at the same color temperature, increase the high-brightness calibration area and the low-brightness calibration area, ensure the accurate calibration of the device under test, and overcome the problem of color analysis. In the calibration of the instrument, the moving guide rail is too long, and the shortcomings of high brightness and low brightness are not calibrated.

Description

A calibration device for a color analyzer

technical field

The invention belongs to the technical field of testing, and in particular relates to a calibration device for a color analyzer.

Background technique

With the gradual application of new light-emitting devices such as LED and miniLED to the fields of street lighting, flat panel display equipment, airborne displays and medical lighting, this not only requires the corresponding test instrument system to be continuously upgraded, but also the corresponding test. It must be optimized, and the requirements for the measurement range and accuracy of the measuring equipment are getting higher and higher. For the large-range and high-precision testing equipment, it needs to have the function of detecting low brightness and high brightness at the same time, and at the same time, it is necessary to ensure the accuracy of the data. Most of the calibrations for color analyzers are based on the "JJG211-2005 Luminance Meter Verification Regulations", which mainly have the following defects: (1) When calibrating under the same luminous brightness, when calibrating and measuring low brightness, additional tests will be added. The length of the platform; (2) When the high brightness is calibrated and measured, the color temperature will change greatly when the brightness is changed, which will affect the stability of the output light, resulting in inaccurate calibration of the device.

SUMMARY OF THE INVENTION

The invention provides a calibration device for a color analyzer, which solves the above technical problems of too long calibration test platform and inaccurate calibration.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

In a first aspect, the present invention provides a calibration device for a color analyzer, including an integrating sphere, a light source module, a diaphragm, a device to be measured, and a guide rail; the integrating sphere includes a cavity sphere, and a light outlet is provided on the cavity sphere and a number of light inlet holes, the light inlet holes are evenly distributed on the circumference of the cavity sphere, and the light source module for providing incident light is embedded in the light inlet hole; the light source module is a uniform light source module with adjustable color temperature and brightness, and the The light source module is electrically connected with the controller; the bottom of the integrating sphere is extended with a guide rail to the side where the light outlet is opened, and the guide rail is sequentially provided with a diaphragm and a device under test along the same optical path.

In combination with the first aspect, further, the light source module includes a light source lamp board and a light guide plate, and a light guide plate is arranged on the surrounding sides of the light source lamp board; the light source lamp board includes warm white light LEDs, warm white light LEDs, green light LEDs and pink LEDs. It is convenient to keep the color temperature unchanged, and the brightness can be adjusted in a wide range.

With reference to the first aspect, further, the warm white LED, the warm white LED, the green LED and the pink LED are all fixed color LEDs.

With reference to the first aspect, further, opal glass is provided at the light outlet.

With reference to the first aspect, the cavity sphere further includes a front hemisphere and a rear hemisphere, the light outlet is provided on the front hemisphere, and the light inlet holes are evenly distributed on the front hemisphere with the light outlet as the center.

With reference to the first aspect, further, the diameter of the light outlet is not greater than 1/3 of the diameter of the integrating sphere.

In combination with the first aspect, further, the total power of the light source module is greater than 250W, the color temperature is 2856K output, and the brightness is adjustable.

With reference to the first aspect, further, the diaphragm is movably connected to the guide rail, and the device under test is movably connected to the guide rail. Played the role of convenient adjustment according to the situation.

With reference to the first aspect, further, the inner wall of the integrating sphere is coated with a diffuse reflection material coating. It plays a role in increasing the reflectivity of incident light.

The beneficial effects achieved by the invention are: by adjusting the brightness and color temperature of the color temperature and brightness adjustable uniform light source module, it can provide stable and uniform light sources with different brightness at the same color temperature for the device under test, and increase the high-brightness calibration area and the low-brightness calibration area. It can ensure the accurate calibration of the device under test, and overcome the shortcomings of the current color analyzer calibration: the moving guide rail is too long, and there are high brightness and low brightness without calibration.

Description of drawings

Fig. 1 is the structural representation of the present invention;

FIG. 2 is a schematic diagram of a light source module of the present invention.

In the figure: 1-integrating sphere; 2-light source module; 2a-light source lamp board; 2b-light guide plate; 3-light outlet; 4-diaphragm;

Detailed ways

The present invention is further described below. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 , a calibration device for a color analyzer includes an integrating sphere 1 , a light source module 2 , a diaphragm 4 , a device under test 5 and a guide rail 6 . The integrating sphere 1 includes a cavity sphere. The cavity sphere is provided with a light outlet 3 and a plurality of light inlet holes. The light inlet holes are uniformly distributed on the circumference of the cavity sphere. A light source module 2 for providing incident light is embedded in the light inlet holes. The light source module 2 is a uniform light source module with adjustable color temperature and brightness. The light source module 2 is electrically connected to the controller, and the controller controls the light source module 2 to achieve the effect of adjusting brightness and color temperature.

As shown in FIG. 2 , the light source module 2 includes a light source lamp board 2a and a light guide plate 2b, and a light guide plate 2b is provided on the surrounding side surfaces of the light source lamp board 2a. The light source lamp board 2a includes warm white light LEDs, warm white light LEDs, green light LEDs and pink light LEDs which are arranged and combined. In this embodiment, the warm white light LED, the warm white light LED, the green light LED and the pink light LED are all fixed color LEDs. In this embodiment, the total power of the light source module 2 is greater than 250W, the color temperature is 2856K, and the brightness is adjustable.

The cavity sphere includes a front hemisphere and a rear hemisphere, the front hemisphere is provided with a light outlet 3, and the light inlet holes are evenly distributed on the front hemisphere with the light outlet 3 as the center of the circle. The diameter of the light outlet 3 is not greater than 1/3 of the diameter of the integrating sphere 1, and opal glass is arranged at the light outlet 3. In this embodiment, the diameter of the opal glass is not less than 50mm.

The inner wall of the integrating sphere 1 is coated with a high reflectivity diffuse reflection material coating, which has the effect of increasing the reflectivity of incident light.

A guide rail 6 is extended from the bottom of the integrating sphere 1 to the side where the light outlet 3 is opened, and the guide rail 6 is sequentially provided with a diaphragm 4 and a device under test 5 along the same optical path. The diaphragm 4 is movably connected to the guide rail 6 , and the device under test 5 is movably connected to the guide rail 6 . The diaphragm 4 and the device under test 5 can move forward and backward on the guide rail 6, which plays the role of convenient adjustment according to the situation. In this embodiment, the number of apertures 4 is at least two, and preferably the number of apertures 4 is three.

By adjusting the brightness and color temperature of the color temperature and brightness adjustable uniform light source module 2, it can provide the device under test 5 with stable and uniform light sources with different brightness at the same color temperature, and increase the high-brightness calibration area and the low-brightness calibration area to ensure the device under test. The accurate calibration of 5 overcomes the shortcomings of the current color analyzer calibration: the moving guide rail is too long, and the high brightness and low brightness are not calibrated.

A calibration method for a color analyzer, comprising the following steps:

Calibrate the device under test 5: adjust the position of the lens and the light outlet of the device under test 5, so that all the areas observed in the field of view of the device under test 5 are placed on the light-emitting surface of the integrating sphere 1;

The brightness parameter measurement linearity calibration of the device under test 5: control the brightness of each LED lamp in the light source module 2 with adjustable color temperature and brightness, and realize a large-scale adjustment of the output brightness of the integrating sphere 1, while ensuring the constant color temperature. It overcomes the calibration error caused by the change of color temperature caused by the change of brightness of the traditional light source.

The test working principle of the present invention: by controlling the luminous intensity of the four groups of LED light source lamps in the light source module 2, the brightness and color temperature of the integrating sphere light outlet 3 are adjusted, the light source parameters of the integrating sphere light outlet 3 are determined by a standard instrument, and the diaphragm is set. 4 and the device under test 5 are placed on the guide rail 6 in sequence, and by adjusting the distance between the device under test 5 and the light source, the linearity calibration of the brightness parameter measurement of the device under test 5 is achieved.

In the actual operation process, when the low brightness is calibrated, the set light source parameters can be adjusted to the same color temperature and low brightness through the controller to calibrate the light source of the light outlet 3, which improves the calibration device's performance. big problem. When calibrating with high brightness, it is adjusted to the same color temperature and high brightness, so as to calibrate it, reducing the calibration error caused by the unstable color temperature. It effectively overcomes the shortcomings of the current color analyzer calibration: the moving guide rail is too long, and the high brightness and low brightness are not calibrated.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (9)

1. A calibration device of a color analyzer is characterized by comprising an integrating sphere, a light source module, a diaphragm, a tested device and a guide rail;

the integrating sphere comprises a cavity sphere, a light outlet and a plurality of light inlets are formed in the cavity sphere, the light inlets are uniformly distributed on the circumference of the cavity sphere, and the light source modules for providing incident light are embedded in the light inlets;

the light source module is a color temperature and brightness adjustable uniform light source module and is electrically connected with the controller;

and a guide rail is arranged at the bottom of the integrating sphere in an extending manner towards one side provided with the light outlet, and a diaphragm and the tested equipment are sequentially arranged on the guide rail along the same light path.

2. The calibration device of the color analyzer according to claim 1, wherein the light source module comprises a light source lamp panel and a light guide plate, and the light guide plate is arranged on the peripheral side surface of the light source lamp panel; the light source lamp panel comprises a warm white LED, a green LED and a powder LED which are arranged and combined.

3. The calibration apparatus for a color analyzer according to claim 2, wherein said warm white LED, said green LED and said pink LED are all fixed color LEDs.

4. The calibration device for a color analyzer as claimed in claim 1, wherein opal glass is disposed at the light exit.

5. The calibrating device for a color analyzer according to claim 1, wherein the hollow sphere comprises a front hemisphere and a rear hemisphere, the front hemisphere has the light outlet, and the light inlets are circumferentially and uniformly distributed on the front hemisphere around the light outlet.

6. The scaling apparatus for a color analyzer as defined in claim 1, wherein the diameter of said light outlet is not more than 1/3 times the diameter of said integrating sphere.

7. The calibration apparatus for a color analyzer according to claim 1, wherein the total power of said light source module is greater than 250W, the color temperature is 2856K output, and the brightness is adjustable.

8. The calibration apparatus for a color analyzer according to claim 1, wherein said diaphragm is movably connected to said guide rail, and said device under test is movably connected to said guide rail.

9. The calibration device for a color analyzer according to claim 1, wherein the inner wall of said integrating sphere is coated with a coating layer of a diffuse reflection material.

Images