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A low-light image intensifier signal-to-noise ratio and halo automatic test system and test method

A low-light image intensifier and automatic test system technology, applied in the direction of testing optical performance, instruments, measuring electricity, etc., can solve the problems of no automatic intelligent test equipment, etc., to achieve improved test efficiency, high reliability, and convenient operation Effect

Active Publication Date: 2022-08-09
NORTH NIGHT VISION TECH
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Problems solved by technology

[0006] Due to the lack of research and development units for low-light image intensifier test equipment in China, some universities and research institutions are only willing to develop based on existing technologies or even a part of them. Foreign countries include image intensifier test equipment in the United States and Poland. Providers have made portable test equipment for comprehensive performance parameter tests on the basis of individual tests of low-light image intensifiers. Multi-parameter tests are integrated on one test equipment, which is convenient for centralized operation and system maintenance, but there is no automation and intelligence. Test Equipment

Method used

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  • A low-light image intensifier signal-to-noise ratio and halo automatic test system and test method
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  • A low-light image intensifier signal-to-noise ratio and halo automatic test system and test method

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Embodiment 1

[0048] The steps of the test method of the low-light low-light image intensifier signal-to-noise ratio and halo automatic test system of the present invention are as follows:

[0049] 1. Image intensifier halo test

[0050] During the automatic halo test, open the electric shutter 19, rotate the electric pinhole wheel 14 to the position of the Ф0.3mm or Ф0.4mm small hole, turn on the sCMOS camera 6, and move the 3D moving slide 9 and Z of the 3D moving mechanism 15 by program control. axis to make the image of the small hole collected on the industrial computer 2 clear; Through the identification and measurement of the pinhole image collected on the industrial computer 2, the actual diameter of the current pinhole light spot is calculated.

[0051] 2. Image intensifier signal-to-noise ratio test

[0052] After the automatic halo test is completed, turn off the sCMOS camera 6 to perform the automatic signal-to-noise ratio test; rotate the electric pinhole wheel 14 to the posi...

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Abstract

The invention relates to an automatic testing system and testing method for the signal-to-noise ratio and halo of a low-light image intensifier. XY electric translation stage, three-dimensional moving mechanism, light source system obscura, automatic code scanning gun, electric baffle, industrial computer, power supply and controller. Methods include test preparation, performing a halo test, and performing a signal-to-noise ratio test. The halo calculates the actual diameter value of the current small hole spot by identifying and measuring the pinhole image; the signal-to-noise ratio is the noise coefficient. The present invention changes the horizontal light path to the vertical light path, which can improve the image intensifier halo, signal-to-noise ratio It is beneficial to automatically install and remove the image intensifier by using the robot air finger, which improves the test efficiency of the image intensifier, and has the characteristics of convenient operation, reduced labor load and high reliability.

Description

technical field [0001] The invention relates to the field of image intensifier testing, in particular to a low-light image intensifier signal-to-noise ratio and halo automatic testing system and testing method. Background technique [0002] The image intensifier is the core component of low-light night vision equipment, which can enhance the weak light to a sufficient brightness for the human eye to observe. The signal-to-noise ratio and halo performance parameters of low-light image intensifiers are very important performance parameters of image intensifiers. They are important indicators to measure the imaging clarity of image intensifiers in low-light environments. An important basis for use in changing environments. [0003] In the current signal-to-noise ratio and halo test of the image intensifier, the two test items are separated on different test equipment. During the test, the image intensifier needs to work under the radiation pattern of the specified accuracy in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02G01R31/00
CPCG01M11/02G01R31/00
Inventor 朱世聪李金沙王俊马怀超王强李顺平
Owner NORTH NIGHT VISION TECH
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