阅读说明：本技术 一种小型透过率测量系统 (Small-size transmittance measurement system ) 是由 苑高强 刘民玉 于 2018-07-31 设计创作，主要内容包括：本发明公开了一种小型透过率测量系统,该小型透过率测量系统包括光源、第一半透过半反射镜、第一椭球反光镜、第二半透过半反射镜、第二椭球反光镜和光谱仪,所述光源发出的光线依次经所述第一半透过半反射镜和第一椭球反光镜反射准直平行光,该准直平行光经透射式样品透射后经所述第二椭球反光镜和第二半透过半反射镜会聚导入所述光谱仪进行分析。本发明将具有一定厚度的透明材料放置于第一半透过半反射镜和第二半透过半反射镜之间形成的准直平行光中测量其透过率时,能够避免了由于色差问题所带来透过率或吸收率的测量误差问题,提高了透明材料透过率测量的精确度。(The invention discloses a small-sized transmittance measurement system which comprises a light source, a first semi-permeable and semi-reflective mirror, a first ellipsoidal reflector, a second semi-permeable and semi-reflective mirror, a second ellipsoidal reflector and a spectrometer, wherein light rays emitted by the light source are reflected by the first semi-permeable and semi-reflective mirror and the first ellipsoidal reflector in sequence to collimate parallel light, and the collimated parallel light is transmitted by a transmission type sample and then is converged and guided into the spectrometer for analysis through the second ellipsoidal reflector and the second semi-permeable and semi-reflective mirror. When the transparent material with a certain thickness is placed in the collimated parallel light formed between the first semi-permeable and semi-reflective mirror and the second semi-permeable and semi-reflective mirror to measure the transmittance of the transparent material, the problem of measurement errors of the transmittance or the absorptivity caused by the problem of chromatic aberration can be avoided, and the accuracy of the transmittance measurement of the transparent material is improved.)

1. The utility model provides a small-size transmittance measurement system, its characterized in that includes light source, first half and sees through half speculum, first ellipsoid reflector, second half and sees through half speculum, second ellipsoid reflector and spectrum appearance, the light that the light source sent passes through in proper order first half sees through half speculum and first ellipsoid reflector reflection collimation parallel light, and this collimation parallel light passes through behind the transmission of transmission formula sample second ellipsoid reflector and second half pass through half speculum convergence leading-in the spectrum appearance carries out the analysis.

2. The compact transmittance measurement system according to claim 1, further comprising a first optical fiber disposed on the optical path between the light source and the first transflective mirror, wherein the light emitted from the light source is transmitted to the first transflective mirror through the first optical fiber.

3. The small transmittance measurement system according to claim 2, further comprising a second optical fiber, wherein the second optical fiber is disposed on a light path between the second semi-transmissive and semi-reflective mirror and the spectrometer, and the collimated parallel light is focused by the second ellipsoidal mirror and then guided into the spectrometer through the second semi-transmissive and semi-reflective mirror and the second optical fiber.

4. The small transmittance measurement system according to claim 3, further comprising a first CCD and a first CCD lens, wherein the collimated parallel light is imaged on the first CCD through the second half-transmitting and half-reflecting mirror and the first CCD lens in sequence.

5. The compact transmittance measurement system according to claim 4, further comprising a second CCD and a second CCD lens, wherein when the light source is connected to the second optical fiber, the light emitted from the light source sequentially reflects parallel light through the second half-transmitting half-reflecting mirror and the second ellipsoidal reflector, and the parallel light sequentially passes through the first half-transmitting half-reflecting mirror and the second CCD lens to be imaged on the second CCD.

6. The compact transmittance measurement system according to any one of claims 2 to 5, further comprising a third optical fiber, wherein one end of the third optical fiber is used for connecting to a spectrometer, and the collimated parallel light is reflected by the reflective sample and then guided to the spectrometer for analysis through the first semi-transmissive semi-reflective mirror, the first ellipsoidal reflector and the third optical fiber.

7. The compact transmittance measurement system according to claim 6, wherein the reflective sample is disposed obliquely in the collimated parallel light.

8. The compact transmittance measurement system according to claim 1, wherein the spectrometer is a fiber optic spectrometer or a rotating grating spectrometer or a filter spectrometer.

9. The compact transmittance measurement system according to claim 1, wherein the light source is a tungsten lamp, a xenon lamp or an LED lamp.

10. The compact transmittance measurement system according to any one of claims 2 to 5, wherein the absorption rate a of the transmissive sample is:

a＝1/(H×lnT)

wherein a is the absorptivity of the transmission type sample, T is the transmittance of the transmission type sample, and H is the thickness of the transmission type sample.

Technical Field

The invention relates to a measuring system for analyzing the transmittance of a material, in particular to a small transmittance measuring system which can eliminate chromatic aberration and is convenient to operate.

Background

At present, the measurement bracket shown in fig. 1 is mostly used in the market for measuring the transmittance of a sample with a certain thickness, wherein 101 is a transmission type sample, 102 is a fiber collimator for testing light, 103 is a fiber for conducting the testing light, 104 is a fiber collimator for transmitting the light, 105 is a fiber for transmitting the light, 106 is a fixed base, 107 is a light source, and 108 is a small-sized fiber spectrometer. The test light emitted from the light source 107 is guided into the fiber collimator 102 of the test light through the fiber 103 for guiding the test light, and is incident into the transmission-type sample 101 in the form of collimated parallel light, and becomes transmission light after being absorbed by the transmission-type sample 101, the transmission light is coupled into the fiber 105 of the transmission light through the fiber collimator 104 of the transmission light, the fiber 105 of the transmission light guides the transmission light into the fiber spectrometer 108 of the transmission light, so that the transmittance of the sample 101 can be calculated by using the following formula,

T＝I2/I1

where I1 is the spectrum received by the fiber 105 that transmits light when the transmissive sample 101 is not placed, and I2 is the spectrum received by the fiber 105 that transmits light when the transmissive sample 101 is placed. When a transparent material with a certain thickness is placed in the collimated parallel light to measure the transmittance, the problem of measurement error of the transmittance caused by chromatic aberration occurs because of the chromatic aberration inherent in the coupling of the conventional lens, and the error increases with the increase of the thickness of the transparent material. This is not useful for application scenarios where accurate measurement of sample transmission is required.

Disclosure of Invention

In order to overcome the problems of the prior art, the present invention provides a compact transmittance measurement system capable of eliminating chromatic aberration and facilitating operation, which solves the chromatic aberration inherent in the conventional lens coupling and avoids the problem of measurement error of transmittance due to chromatic aberration.

In order to achieve the purpose, the invention specifically adopts the following technical scheme:

the invention provides a small-sized transmittance measurement system which comprises a light source, a first semi-permeable and semi-reflective mirror, a first ellipsoidal reflector, a second semi-permeable and semi-reflective mirror, a second ellipsoidal reflector and a spectrometer, wherein light rays emitted by the light source are reflected by the first semi-permeable and semi-reflective mirror and the first ellipsoidal reflector in sequence to collimate parallel light, and the collimated parallel light is transmitted by a transmission type sample and then is converged and guided into the spectrometer for analysis through the second ellipsoidal reflector and the second semi-permeable and semi-reflective mirror.

Preferably, the optical fiber further comprises a first optical fiber, the first optical fiber is arranged on a light path between the light source and the first transflective mirror, and light emitted by the light source is emitted to the first transflective mirror through the first optical fiber.

Preferably, the spectrometer further comprises a second optical fiber, the second optical fiber is arranged on a light path between the second semi-permeable and semi-reflective mirror and the spectrometer, and the collimated parallel light is focused by the second ellipsoidal reflector and then guided into the spectrometer through the second semi-permeable and semi-reflective mirror and the second optical fiber.

Preferably, the device further comprises a first CCD and a first CCD lens, and the collimated parallel light sequentially passes through the second semi-permeable and semi-reflective mirror and the first CCD lens to be imaged on the first CCD.

Preferably, the optical fiber coupling device further comprises a second CCD and a second CCD lens, when the light source is connected to the second optical fiber, light emitted from the light source sequentially passes through the second semi-transmissive semi-reflective mirror and the second ellipsoidal reflector to reflect parallel light, and the parallel light sequentially passes through the first semi-transmissive semi-reflective mirror and the second CCD lens to be imaged on the second CCD.

Preferably, the spectrometer further comprises a third optical fiber, one end of the third optical fiber is used for being connected with a spectrometer, and the collimated parallel light is reflected by the reflection sample and then guided into the spectrometer through the first semi-transmission semi-reflection mirror, the first ellipsoidal reflector and the third optical fiber for analysis.

Preferably, the reflective sample is obliquely arranged in the collimated parallel light. .

Preferably, the spectrometer is a fiber optic spectrometer or a rotating grating spectrometer or a filter spectrometer.

Preferably, the light source is a tungsten lamp or a xenon lamp or an LED lamp.

Preferably, the absorption rate a of the transmissive sample is: a is 1/(H × lnT).

Wherein a is the absorptivity of the transmission type sample, T is the transmittance of the transmission type sample, and H is the thickness of the transmission type sample.

Compared with the prior art, the small-sized transmittance measurement system comprises a light source, a first semi-permeable semi-reflecting mirror, a first ellipsoidal reflector, a second semi-permeable semi-reflecting mirror, a second ellipsoidal reflector and a spectrometer, wherein light rays emitted by the light source are reflected by the first semi-permeable semi-reflecting mirror and the first ellipsoidal reflector in sequence to form collimated parallel light, and the collimated parallel light is transmitted by a transmission type sample and then is converged and guided into the spectrometer for analysis through the second ellipsoidal reflector and the second semi-permeable semi-reflecting mirror; in the invention, when the transparent material with a certain thickness is placed in the collimated parallel light formed between the first semi-permeable and semi-reflective mirror and the second semi-permeable and semi-reflective mirror to measure the transmittance, the problem of measurement error of the transmittance or the absorptivity caused by the problem of chromatic aberration can be avoided, and the accuracy of the transmittance measurement of the transparent material is improved.

Drawings

FIG. 1 is a prior art transparent material transmittance measurement system;

fig. 2 is a schematic structural diagram of a compact transmittance measurement system according to embodiment 1 of the present invention, which includes a first CCD and a first CCD lens;

fig. 3 is a schematic structural view of a compact transmittance measurement system according to embodiment 1 of the present invention, which includes a first CCD, a first CCD lens, a second CCD and a second CCD lens;

FIG. 4 is a schematic view of a compact transmittance measurement system according to example 1 of the present invention, which does not include a test sample;

FIG. 5 is a schematic view of a compact transmittance measurement system according to example 1 of the present invention, in which a test sample is provided;

FIG. 6 is a graph showing the measurement results of transmittance measurement of QB2 color glass using the compact transmittance measurement system of the present invention;

fig. 7 is a schematic structural view of a compact transmittance measurement system according to embodiment 2 of the present invention.

In the figure, 101, transmissive sample; 102. a fiber collimator for testing light; 103. an optical fiber for conducting test light; 104. a light-transmitting fiber collimator; 105. an optical fiber transmitting light; 106. a fixed base; 107. a light source; 108. a spectrometer; 201. a first optical fiber; 202. a first transflective mirror; 203. a first ellipsoidal mirror; 204. a first CCD lens; 205. a first CCD; 206. a second transflective mirror; 207. a second ellipsoidal mirror; 208. a second optical fiber; 301. a second CCD lens; 302. a second CCD; 601. a reflective sample; 602. a third optical fiber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.