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

doi:10.1117/12.2032712

21 August 2013 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, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications; 89080Q (2013) https://doi.org/10.1117/12.2032712
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

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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Xiaofeng Bai, Lei Yin, Wen Hu, Yingping He, and Fangcheng Wang "Analysis of output signal to noise ratio’s uniformity for low light level image intensifier assembly", Proc. SPIE 8908, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications, 89080Q (21 August 2013); https://doi.org/10.1117/12.2032712

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KEYWORDS

Signal to noise ratio

Image intensifiers

Interference (communication)

Night vision systems

Microchannel plates

Imaging systems

Optical sensors

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