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Integrated tester for low-light image intensifier and test method of tester

A low-light image intensifier and comprehensive tester technology, which is applied in optical instrument testing, machine/structural component testing, and optical performance testing, can solve the problems of high total cost and complicated operation of the three test systems, and reduce Hardware overhead, simple operation, moderately sized effects

Inactive Publication Date: 2017-02-01
NANJING UNIV OF SCI & TECH
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  • Description
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AI Technical Summary

Problems solved by technology

The existing low-light image intensifier tester needs different instruments to test different parameters. This method is complicated to operate, and the total cost of the three test systems is relatively high.

Method used

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  • Integrated tester for low-light image intensifier and test method of tester
  • Integrated tester for low-light image intensifier and test method of tester
  • Integrated tester for low-light image intensifier and test method of tester

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Experimental program
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Embodiment Construction

[0016] Principle of invention

[0017] 1. Light source system design

[0018] The light source assembly of the low-light image intensifier comprehensive test system consists of a light source 1, a neutral filter 2, an integrating sphere 3, and a diaphragm 4. In the measurement of low-light image intensifier parameters, the uniform diffuse low-illuminance light source is one of its key components. Since the brightness gain is proportional to the photocathode sensitivity, and the cathode sensitivity is related to the spectral composition of the light source, the color temperature of the light source is 2856K standard A light source 1, and is powered by a high-precision and high-stability constant current source. The light bulb is dimmed by neutral filter 2, and then passed by integrating sphere 3 to form a uniform diffuse source, and the illuminance range is 10 -5 lx~10 -1 Uniform diffuse low-illuminance light source between lx, the non-uniformity of its light is less than 1%...

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Abstract

The invention discloses an integrated tester for low-light image intensifier and a test method of the tester. The integrated tester comprises a light source, a neutral color filter, an integrating sphere, a diaphragm, a conjugate lens, a camera obscura, a parallel light pipe and a replaceable movable part; and parts except a resolution test assembly, a brightness gain assembly and a signal to noise ratio test assembly of the whole tester are shared. During parameter test, a corresponding parameter assembly is pushed into a guiding block of guide rails, so that the two guide rails are in seamless butt joint. According to the tester and test method, integrated design is used, and three technical indexes including the signal to noise ratio, the brightness gain and the resolution of the low-light image intensifier are tested in one set of instruments, namely the tester.

Description

technical field [0001] The invention relates to the field of comprehensive testing of low-light image intensifiers, in particular to a comprehensive tester for low-light image intensifiers and a testing method thereof. Background technique [0002] In low-light night vision technology, the low-light image intensifier is the core device of low-light night vision technology. It is the decisive factor for the performance and price of low-light night vision equipment. The performance parameters of the image intensifier determine the low-light night vision. system performance. [0003] The third-generation low-light image intensifier is the core device that constitutes the advanced low-light night vision technology. In order to characterize the performance of the image intensifier, parameters such as signal-to-noise ratio, brightness gain, and resolution are usually used. [0004] The low-light image intensifier works under weak light conditions at night, and the input optical s...

Claims

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 张俊举季天慈吴健张弦子何叶高原顾治峰何士浩
Owner NANJING UNIV OF SCI & TECH
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