CN211291747U

CN211291747U - Calibration device of color analyzer

Info

Publication number: CN211291747U
Application number: CN201922436091.4U
Authority: CN
Inventors: 胡运龙; 徐伟; 刘英奇; 姚军
Original assignee: Kunshan Junwo Photoelectric Co ltd
Current assignee: Kunshan Junwo Photoelectric Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-18
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a calibration device of a color analyzer, which comprises an integrating sphere, a light source module, a diaphragm, tested equipment and a guide rail; the integrating sphere comprises a cavity sphere, wherein a light outlet and light inlet holes are formed in the cavity sphere, the light inlet holes are uniformly distributed on the circumference of the cavity sphere, and light source modules for providing incident light are embedded in the light inlet holes; the light source module is a color temperature and brightness adjustable uniform light source module and is electrically connected with the controller; the bottom of the integrating sphere is extended to one side provided with a light outlet and provided with a guide rail, and the guide rail is provided with a diaphragm and a tested device. The brightness and the color temperature of the light source module are adjusted, stable and uniform light sources with different brightness under the same color temperature are provided for the tested equipment, the high-brightness calibration area and the low-brightness calibration area are added, the accurate calibration of the tested equipment is guaranteed, and the defects that a moving guide rail is too long, and is high-brightness and low-brightness are not calibrated in the calibration of a color analyzer are overcome.

Description

Calibration device of color analyzer

Technical Field

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

Background

Along with the fields such as novel light emitting device LED, miniLED gradually wide application to street lamp illumination, flat panel display equipment, machine carries display and medical lighting, this not only requires that corresponding test instrument system need be upgraded continuously and updated, and its corresponding test also must be optimized, and is more and more high to measuring device's measuring range and requirement of precision, need possess the function that can detect low luminance and hi-lite simultaneously to wide-range, high accuracy check out test set, need guarantee the accuracy of data simultaneously. Most of the calibration for color analyzers is based on the JJG211-2005 luminance meter verification protocol, and the following defects mainly exist: (1) when the calibration is carried out under the same brightness, the length of the test platform can be increased when the calibration measurement is carried out on the low brightness; (2) when the high brightness is calibrated and measured, the color temperature can be greatly changed when the brightness is changed, and the stability of output light is influenced, so that the calibration of the equipment is inaccurate.

Disclosure of Invention

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

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

in a first aspect, the invention provides a calibration device of a color analyzer, which comprises an integrating sphere, a light source module, a diaphragm, a device to be tested 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.

With reference to the first aspect, further, the light source module includes a light source lamp panel and a light guide plate, and the light guide plate is disposed 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. The color temperature is convenient to keep unchanged, and the brightness is adjusted in a large range.

With reference to the first aspect, further, 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 disposed at the light exit.

In combination with the first aspect, further, the cavity ball includes a front half ball and a rear half ball, the front half ball is provided with the light outlet, and the light inlets are uniformly distributed on the front half ball circumferentially around the light outlet.

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

With reference to 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. The function of convenient adjustment according to the situation is achieved.

With reference to the first aspect, further, a coating layer of a diffuse reflection material is coated on an inner wall of the integrating sphere. Which acts to increase the reflectivity of the incident light.

The invention achieves the following beneficial effects: through the luminance and the colour temperature of adjusting the adjustable even light source module of colour temperature luminance, can increase high bright calibration district and low bright calibration district for the stable even light source of different luminance under the same colour temperature is provided to equipment under test, guarantees equipment under test's accurate calibration, has overcome and has existed in the calibration of present color analysis appearance: the moving guide rail is too long, and the defects of high brightness, low brightness and no calibration exist.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a light source module according to the present invention.

In the figure: 1-integrating sphere; 2-a light source module; 2 a-light source lamp panel; 2 b-a light guide plate; 3-a light outlet; 4-a diaphragm; 5-the device under test; 6-guide rail.

Detailed Description

The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a calibration apparatus 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 comprises a cavity sphere, a light outlet 3 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 light source modules 2 for providing incident light are embedded in the light inlets. The light source module 2 is a color temperature and brightness adjustable uniform light source module, the light source module 2 is electrically connected with 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 panel 2a and a light guide plate 2b, and the light guide plate 2b is disposed on the peripheral side surface of the light source lamp panel 2 a. The light source lamp panel 2a includes a warm white LED, a green LED and a powder LED. In this embodiment, the warm white LED, the green LED, and the pink 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 output, and the brightness is adjustable.

The cavity sphere comprises a front hemisphere and a rear hemisphere, the front hemisphere is provided with a light outlet 3, and the light inlets are uniformly distributed on the front hemisphere circumferentially by taking the light outlet 3 as the center of a circle. The diameter of the light outlet 3 is not more 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 50 mm.

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

The bottom of the integrating sphere 1 is extended to one side provided with the light outlet 3 to form a guide rail 6, and the guide rail 6 is sequentially provided with a diaphragm 4 and a tested device 5 along the same light path. The diaphragm 4 is movably connected with the guide rail 6, and the device under test 5 is movably connected with the guide rail 6. The diaphragm 4 and the tested device 5 can move back and forth on the guide rail 6, and the function of convenient adjustment according to the situation is achieved. In the present embodiment, the number of the diaphragms 4 is at least two, and preferably, the number of the diaphragms 4 is three.

Through the luminance and the colour temperature of adjusting adjustable even light source module 2 of colour temperature luminance, can provide the stable even light source of different luminance under the same colour temperature for equipment under test 5, increase high bright calibration district and low bright calibration district, guarantee equipment under test 5's accurate calibration, overcome and exist in the calibration of present color analysis appearance: the moving guide rail is too long, and the defects of high brightness, low brightness and no calibration exist.

A method of calibrating a color analyzer, comprising the steps of:

calibration of the device under test 5: adjusting the positions of a lens and a light outlet of the tested device 5 to ensure that the regions observed in the field of view of the tested device 5 are all arranged on the light outlet surface of the integrating sphere 1;

and (3) the brightness parameter measurement linearity calibration of the tested device 5: the brightness of each LED lamp in the color temperature brightness adjustable uniform light source module 2 is controlled, the output brightness of the integrating sphere 1 is adjusted in a large range, and meanwhile, the color temperature is guaranteed to be unchanged. The scaling error caused by the color temperature change caused by the brightness change of the traditional light source is overcome.

The testing working principle of the invention is as follows: the brightness and the color temperature of the integrating sphere light outlet 3 are adjusted by controlling the light intensity of four groups of LED light source lamps in the light source module 2, the light source parameters of the integrating sphere light outlet 3 are well determined by a standard instrument, the diaphragm 4 and the equipment to be tested 5 are sequentially placed on the guide rail 6, and the measurement linearity of the brightness parameters of the equipment to be tested 5 is calibrated by adjusting the distance between the equipment to be tested 5 and the light source.

In the actual operation process, when the luminance is calibrated at a low level, the set light source parameters can be adjusted to the same color temperature and low luminance by the light source at the light outlet 3 through the controller, so that the calibration is carried out, and the overlarge problem of the calibration device is solved. And when the brightness is calibrated at a higher brightness, the brightness is adjusted to the same color temperature and the high brightness, so that the calibration is carried out, and the calibration error caused by unstable color temperature is reduced. Effectively overcome and exist in the present color analyzer calibration: the moving guide rail is too long, and the defects of high brightness, low brightness and no calibration exist.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

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.