Research on testing output signal-to-noise ratio of image intensifier

Bingqi Liu; Bin Zhou; Zhiyun Gao; Wei Zhang

doi:10.1117/12.572331

10 February 2005 Research on testing output signal-to-noise ratio of image intensifier

Bingqi Liu, Bin Zhou, Zhiyun Gao, Wei Zhang

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.572331
Event: Photonics Asia, 2004, Beijing, China

Abstract

Image intensifier is the kernel of the low-light-level image device. Output signal-to-noise ratio is one of its important parameters which can reflect the image intensifier’s imaging quality. Traditionally the test of image intensifier’s output signal-to-noise raito is realized by using a multiplier phototube, which method only gets the output signal-to-noise ratio of temporal field and can not evaluate the effect of the space structure’s nonhomogeneity of the fluorescence screen in the round. In view of these defects, the traditional method is replaced by a new one based on the three-dimensional noise theory. In this paper, a set of test formulas of output signal-to-noise ratio in spatio-temporal field which can roundly evaluate the image intensifier’s imaging quality are deduced, a test system based on the planar CCD image gathering and processing system with high sensitivity and low noise is designed. By using digital image processing technology based on Visual C++ and Matlab, a part of tested data of some home image intensifiers are given and subsequently some 3-D graphs of noise which can describe the spatical-temporal field’s imaging character in different brightness gain are drawn. The practical results can show that the new test method is rounded, accurate and visualized.

Citation Download Citation

Bingqi Liu, Bin Zhou, Zhiyun Gao, and Wei Zhang "Research on testing output signal-to-noise ratio of image intensifier", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.572331

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