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High-precision laser scanning type transmissivity distribution measuring device and measuring method

A transmittance distribution, laser scanning technology

Pending Publication Date: 2022-03-25
XIAN TECHNOLOGICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a high-precision laser scanning transmittance distribution measurement device and measurement method, which overcomes the large motion error, long measurement time, low efficiency and anti-interference ability of multi-point measuring instruments in the prior art weak question

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  • High-precision laser scanning type transmissivity distribution measuring device and measuring method
  • High-precision laser scanning type transmissivity distribution measuring device and measuring method
  • High-precision laser scanning type transmissivity distribution measuring device and measuring method

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Embodiment

[0039] see figure 1The device of the present invention consists of a main control unit 1, a laser light source 2, an acousto-optic deflection assembly 3, a light trap 4, a sample to be tested 5, an integrating sphere 6, a photodetector 7, a signal processing assembly 8 and an ultrasonic drive circuit 9. The acousto-optic deflection component 3 is composed of an incident coupling optical element, two coupled acousto-optic crystals and a collimator coupled on the exit surface, and the signal processing component 8 is composed of a preamplifier circuit with adjustable magnification and a lock-in amplifier. The main control unit 1 is connected with the laser light source 2, the main control unit 1 adopts an industrial computer with a data acquisition card, the laser light source 2 is connected with the acousto-optic deflection assembly 3 through an optical fiber, the acousto-optic deflection assembly 3 is connected with the ultrasonic drive circuit 9, and the ultrasonic drive The ...

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Abstract

The invention relates to a high-precision laser scanning type transmissivity distribution measuring device and a measuring method. The problems that in the prior art, a single-point measuring instrument is large in motion error, long in measuring time and low in efficiency due to the fact that a mechanical displacement assembly is used for achieving range scanning, and a multi-point measuring instrument is poor in anti-interference capacity are solved. The device comprises a main control unit, the main control unit is connected with a laser light source, the laser light source is connected with an acousto-optic deflection assembly through an optical fiber, the acousto-optic deflection assembly is connected with an ultrasonic drive circuit, the ultrasonic drive circuit is connected with the main control unit, and an integrating sphere is arranged on one side of an emergent surface of the acousto-optic deflection assembly; the light trap is arranged on one side of the incident surface of the sample to be detected, the integrating sphere is connected with the photoelectric detector, the photoelectric detector is connected with the signal processing assembly, and the signal processing assembly is connected with the main control unit.

Description

Technical field: [0001] The invention belongs to the technical field of photoelectric detection, and relates to a high-precision laser scanning transmittance distribution measurement device and a measurement method that use an acousto-optic crystal to deflect light to realize fine two-dimensional scanning of light spots. Background technique: [0002] As an important index to characterize the transmission characteristics of materials, transmittance is widely used in military industry, national defense, drug analysis, medical imaging and instrument testing and other fields. In addition, the change of certain physical quantities can also be converted into the measurement of transmittance, and the change of other physical quantities can be reflected by measuring the transmittance information of the sample to be measured, such as the change of solution concentration through the change of solution transmittance. [0003] Although the existing transmittance measuring instruments h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59G01N21/17G01N21/47G01N21/01
CPCG01N21/1702G01N21/59G01N21/4788G01N21/01G01N2021/0112
Inventor 李忻哲高爱华秦文罡
Owner XIAN TECHNOLOGICAL UNIV
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