Dr. Yin Lei Profile

Dr. Yin Lei

at Xi'an Jiaotong Univ

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Proceedings Article | 21 August 2013 Paper

Analysis of output signal to noise ratio’s uniformity for low light level image intensifier assembly

Xiaofeng Bai, Lei Yin, Wen Hu, Yingping He, Fangcheng Wang

Proceedings Volume 8908, 89080Q (2013) https://doi.org/10.1117/12.2032712

KEYWORDS: Signal to noise ratio, Image intensifiers, Night vision systems, Interference (communication), Microchannel plates, Imaging systems, Optical sensors, Wafer-level optics, Night vision, Antimony

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Output signal to noise ratio, which is an important technical index for evaluating low light level image intensifier assembly, decides the detectability of night vision system used in low light level condition. In this article, for evaluating the uniformity of output signal to noise ratio, the end surface of image intensifier assembly has been divided into some section on which the output signal to noise ratio is measured according to the method to signal to noise ratio. It can be concluded form the output signal to noise ratio on each section that the output signal to noise ratio is good uniform in central area of end surface, but the output signal to noise ratio is worse for whole end surface. To explore the main reason for worse uniformity of output signal to noise ratio, sensitivity of image intensifier on each section has been also designed and analyzed. It has been proven by testing the sensitivity of image intensifier that the uniformity of output signal to noise ratio is related to sensitivity’s uniformity, the output signal to noise ratio is uniform on the section which sensitivity is uniform, and the output signal to noise ratio is worse uniform on the section which sensitivity is also worse uniform. The uniformity of output signal to noise ratio can be improved by choosing good photocathode which sensitivity’s uniformity is better. The result in this article is value for improving the application characteristic of low light level image intensifier assembly.

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