CN212133867U

CN212133867U - Double-beam photometric device for optimizing repeatability

Info

Publication number: CN212133867U
Application number: CN202021038131.6U
Authority: CN
Inventors: 彭磊; 黄洁锋; 李生佩
Original assignee: Shenzhen Wave Optoelectronics Technology Co ltd
Current assignee: Shenzhen Wave Optoelectronics Technology Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-12-11
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a double-beam photometric device for optimizing repeatability, which comprises an integrating sphere, a ground glass device, a test light path and a reference light path; the integrating sphere comprises a light source, a tested window, a test emergent window and a reference emergent window; the test emergent light window and the tested window are respectively positioned on the spherical surfaces above and below the integrating sphere; an optical path optical axis formed by the reference emergent window and the reference optical path falls on the inner wall of the integrating sphere; the ground glass device comprises ground glass, the ground glass is movably or swing-movably arranged above the test exit window, and the ground glass can cover or not cover the test exit window according to requirements. The utility model provides an optimize two light beam photometric device of repeatability only adopts the structure of an integrating sphere to realize the function of the inconsistent change of two sensors of effective calibration, its simple structure, convenient assembling, easily miniaturation.

Description

Double-beam photometric device for optimizing repeatability

Technical Field

The utility model relates to a reflectance spectrum's measurement field, in particular to optimize repeatability's two light beam photometric device.

Background

The color measuring device for calculating the color parameters of an object by detecting the reflection spectrum of the surface of the object usually adopts a dual-beam photometric method for measurement, the dual-beam color measuring device comprises two light paths, namely a light path for testing a sample (hereinafter referred to as a "test light path") and a light path for testing reference light (hereinafter referred to as a "reference light path"), after an illumination light source is lightened, two beams of light respectively enter the test light path and the reference light path, the test light path and the reference light path are respectively measured at the same time, the measurement results are compared, and the reflection spectrum of the test sample is calculated. In a stable test environment, the double-beam color measuring equipment has the advantages of high repetition precision and low indication error. Specifically, referring to fig. 1, a dual-beam photometry device in the prior art includes an integrating sphere 200, a light source 2001, a measured object window 2002, a measured object exit light window 202, a sphere wall exit window 203, and

spectrometers

204 and 205; the working principle is that when the light source 1001 emits light at the same time, the chromaticity value of the light reflected by the window 2002 of the measured object and the energy value of the light reflected by the spherical wall of the integrating sphere are collected at the same time.

However, when the environmental temperature is greatly changed after the dual-beam colorimetry device is calibrated, the two sensors in the device are affected by temperature, vibration and electronic interference, so that the performances of the two sensors are changed inconsistently, and the repeatability precision is deteriorated.

The patent No. ZL 201510606503.8, entitled "dual-optical path spectrocolorimeter with repeatability optimization device and optimization method" (hereinafter referred to as "038 patent"), discloses a dual-optical path spectrocolorimeter with repeatability optimization device and optimization method, wherein the dual-optical path spectrocolorimeter is provided with a first integrating sphere and a second integrating sphere, a xenon lamp and a baffle are arranged in the first integrating sphere, a halogen lamp baffle is arranged in the second integrating sphere, and the second integrating sphere is used for calibrating a sensor of a main channel and an auxiliary channel.

However, comparing the 038 patent with the dual-beam colorimeter shown in fig. 1, we find that the introduction of the second integrating sphere device to calibrate the inconsistent changes of the two sensors in the 038 patent results in the defects of complex structure, complex assembly, inconvenience for miniaturization and the like of the whole colorimeter in the 038 patent.

Therefore, the prior art is in need of improvement.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides an optimize repeatability's two light beam photometric device, concrete scheme is as follows:

the device comprises an integrating sphere, a ground glass device, a test light path and a reference light path; the test light path comprises a test coupling light path and a test sensor; the reference optical path comprises a reference coupling optical path and a reference sensor;

the integrating sphere comprises a light source, a tested window, a test emergent window and a reference emergent window; the test exit window and the tested exit window are respectively positioned on the spherical surfaces above and below the integrating sphere, and particularly, the tested exit window and the tested exit window are positioned on the same cross-section circle passing through the center of the sphere of the integrating sphere; light of a light path formed by the reference emergent window and the reference light path is reflected by the inner wall of the integrating sphere;

the ground glass device comprises ground glass, the ground glass is movably or swing-movably arranged above the test exit window, and the ground glass can cover or not cover the test exit window according to requirements.

Preferably, the ground glass device further comprises a motor, and the ground glass is driven by the motor to swing, so that the test exit window is covered or uncovered.

Preferably, the integrating sphere is further provided with a light absorption trap, the test exit window is located on one side of the normal line of the tested window, the light absorption trap is located on the other side of the normal line of the tested window, and the size of the light exit angle formed by the test exit window and the normal line of the tested window is equal to the size of the light incident angle formed by the absorption trap and the normal line of the tested window.

Preferably, the scattered light of the ground glass exit surface exhibits lambertian scattering or near lambertian scattering.

Preferably, a baffle is further arranged in the integrating sphere and used for preventing the light emitted by the light source from directly irradiating the measured object.

The utility model provides an optimize repeatability's two light beam photometric device has following advantage:

1. the utility model provides a double-beam photometric device for optimizing repeatability only adopts the structure of an integrating sphere to realize the function of effectively calibrating the inconsistent changes of two sensors, and has simple structure, convenient assembly and easy miniaturization; meanwhile, the ground glass is arranged outside the integrating sphere and has no influence on the structure of the integrating sphere;

2. in the preferred scheme, the arrangement of the light absorption trap further ensures the test effect;

3. in the preferred scheme, still be equipped with the baffle in the integrating sphere for prevent that the light direct irradiation of light source transmission from on the measured object, further guaranteed test effect.

Drawings

Fig. 1 is a schematic structural diagram of a dual-beam photometric device in the prior art;

fig. 2 is a schematic view of a modular structure of a dual-beam photometric device for optimizing repeatability according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a dual-beam photometry device for optimizing repeatability according to an embodiment of the present invention, in a state where the ground glass does not cover the exit window;

fig. 4 is a schematic perspective view of a dual-beam photometry device for optimizing repeatability according to an embodiment of the present invention in a state where a ground glass covers an exit window;

fig. 5 is a schematic view illustrating a working principle of a dual-beam light measuring device for optimizing repeatability according to an embodiment of the present invention when the ground glass does not cover the exit window;

fig. 6 is a schematic view illustrating a working principle of a dual-beam light measuring device for optimizing repeatability according to an embodiment of the present invention when a ground glass covers an exit window;

FIG. 7 is a schematic view of the position of the light absorbing trap;

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2 to 6, the present embodiment provides a dual-beam photometry device for optimizing repeatability, which includes an integrating sphere 100, a ground glass device 101, a test light path 102, and a reference light path 103; the test optical path 102 comprises a test coupling optical path 1021 and a test sensor 1022; the reference optical path 103 includes a reference coupling optical path 1031 and a reference sensor 1032.

The integrating sphere 100 comprises a light source 1001, a tested window 1003, a tested exit window 1004 and a reference exit window 1006; the test exit window 1004 and the tested exit window 1003 are respectively located on the spherical surface above and below the integrating sphere 100, specifically, the tested exit window 1003 and the test exit window 1004 are located on the same cross-sectional circle passing through the center of the sphere of the integrating sphere 100; the light of the light path formed by the reference exit window 1006 and the reference light path 103 is reflected by the inner wall of the integrating sphere 100.

The ground glass device 101 comprises ground glass 1011, the ground glass 1011 is movably or swingably mounted above the test exit window 1004 and can cover or uncover the test exit window 1004 as required; the ground glass device 101 further comprises a motor 102, and the ground glass 1011 is driven by the motor 1012 to swing so as to realize the switching action of covering or uncovering the test exit window 1004.

When the ground glass 1011 does not cover the test exit window 1004, as shown in fig. 3 and 5, when the light source 1001 is turned on for the first time, the reflected light of the object to be tested at the object to be tested window 1003 is converged to the entrance port of the test sensor 1022 through the test coupling light path 1021 to realize the detection of the test light path 102, and the inner wall of the integrating sphere 100 is converged to the entrance port of the reference sensor 1031 through the reference exit window 1006 by the reference coupling light path 1031 to realize the detection of the reference light path; the light source 1001 is lighted for the first time, and the spectral values of the measured object can be obtained through simultaneous measurement of the test light path and the reference light path 103 and analysis of the test sensor 1022 and the reference sensor 1032;

when the ground glass 1011 covers the test exit window 1004, as shown in fig. 4 and 6, when the light source 1001 is turned on for the second time, the ground glass 1011 is outside the integrating sphere 100 and is located on a connecting line between the tested window 1003 and the test coupling optical path 1021, and the ground glass 1011 covers the test exit window 1004 to block reflected light of a tested object at the tested window 1003 from converging to an entrance port of the test sensor 1022, at this time, each point on the inner wall of the integrating sphere 100 is irradiated with reflected light on the ground glass 1011 to form a uniform light spot, a light part of the light spot is scattered and reflected by the ground glass 1011 to enter the integrating sphere 100, another part of the light is scattered by the ground glass 1011 after being absorbed by the ground glass 1011 and exits from the other surface of the ground glass 1011, the exiting light forms a uniform light spot on the exiting surface of the ground glass 1011, and the exiting light beam presents lambertian scattering, the light scattering state of the inner wall of the integrating sphere 100 is consistent, at this time, the light of the scattering surface of the ground glass 1011 is converged to the entrance port of the test sensor 1022 by the test coupling light path 1021 and is received and detected by the test sensor 1022, and the inner wall of the integrating sphere 100 passes through the reference exit window 1006 and is converged to the entrance port of the reference sensor 1031 by the reference coupling light path 1031, so that the detection of the reference light path 103 is realized; the light source 1001 is turned on for the second time, the test light path 102 and the reference light path 103 simultaneously measure the data of the inner wall of the integrating sphere 100 and the data of the emitting surface of the ground glass 1011, respectively, and the proportion of the data measured by the test sensor 1022 and the reference sensor 1032 is kept unchanged under the condition that the performances of the test sensor 1022 and the reference sensor 1032 do not change.

When the system is used, the light source 1001 continuously emits light twice in a short time through the sequential switching of the two states of the ground glass 1011 to complete one complete measurement.

The integrating sphere 100 is further provided with a light absorption well 1005, the test exit window 1004 is located on one side of the normal of the tested window 1003, and the light absorption well 1005 is located on the other side of the normal of the tested window 1003, wherein the light exit angle formed by the test exit window 1004 and the normal of the tested window 1003 is equal to the light incident angle formed by the absorption well 1005 and the normal of the tested window 1003, and by absorption of the light absorption well 1005 on light, the light at the light absorption well 1005 is prevented from generating mirror reflection on the tested window 1003, the light reflected by the mirror is prevented from entering a test light path, and elimination of mirror reflection components is realized. Specifically, referring to fig. 7, the central position of the tested window 1003 is set to be a, the normal line of the tested window 1003 is AD, the central position of the test exit window 1004 is set to be B, the position of the light absorption well 1005 is C, and the size of an included angle CAD between the connection line AC and the AD is equal to the included angle BAD and is located on the same plane.

The light source 1001 is arranged on the inner wall of the integrating sphere 100, and the integrating sphere 100 further comprises a baffle 1002 for preventing the light source 1001 from directly irradiating a measured object of the measured window 1003.

The reference coupling optical path 1031 includes two coupling mirrors and a mirror, the light from the reference exit window 1006 irradiates on the mirror, then passes through the two coupling mirrors and then reaches the reference sensor 1032, and the arrangement of the mirror is favorable for the arrangement design of the reference coupling optical path 1031, and is more favorable for miniaturization.

2. the arrangement of the light absorption trap further ensures the test effect.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A double-beam photometric device that optimizes repeatability which characterized in that: the device comprises an integrating sphere, a ground glass device, a test light path and a reference light path; the test light path comprises a test coupling light path and a test sensor; the reference optical path comprises a reference coupling optical path and a reference sensor;

2. A dual beam metering device for optimizing repeatability according to claim 1 wherein: the ground glass device further comprises a motor, and the ground glass is driven by the motor to swing so as to realize the switching action of covering or uncovering the test exit window.

3. A dual beam metering device for optimizing repeatability according to claim 1 wherein: the integrating sphere is further provided with a light absorption trap, the test exit window is located on one side of the normal line of the tested window, the light absorption trap is located on the other side of the normal line of the tested window, and the size of a light exit angle formed by the test exit window and the normal line of the tested window is equal to the size of a light incident angle formed by the absorption trap and the normal line of the tested window.

4. A dual beam metering device for optimizing repeatability according to claim 1 wherein: the scattered light of the ground glass exit surface is in Lambertian scattering or near Lambertian scattering.

5. A dual beam metering device for optimizing repeatability according to claim 1 wherein: and a baffle plate is also arranged in the integrating sphere and used for preventing the light emitted by the light source from directly irradiating the measured object.