Relation between signal-noise-ratio of UV image intensifier and voltage of MCP

Jin Zhou; Yafeng Qiu; Xinglin Wu

doi:10.1117/12.2019665

4 March 2013 Relation between signal-noise-ratio of UV image intensifier and voltage of MCP

Jin Zhou, Yafeng Qiu, Xinglin Wu

Proceedings Volume 8761, PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering; 87610T (2013) https://doi.org/10.1117/12.2019665
Event: Third International Conference on Photonics and Image in Agriculture Engineering (PIAGENG 2013), 2013, Sanya, China

Abstract

A system of signal-to-noise ration (SNR)tester for LLL image intensifier is reconstructed . To realize SNR tester for UV image intensifier,the signal processing module and measurement software of the tester are reconstructed.The system of UV optical path is used. Based on photoemission mechanism of photocathode, noise factor of photocathode is concerned with quantum yield. In a range,noise factor of micro-channel plate(MCP) is decreased with the increase in gain. For a fixed size micro channel,the gain of MCP is increased as the voltage of MCP rises. The analyzed results show that when the voltage of MCP is in the range of -700V~-850V,the noise factor is monotonically decreased,when it exceed -850V, MCP is saturated. Although gain has continued to increase, noise factor is in the state of saturation. Experiment platform is builded according to SNR tester principle diagram of UV image intensifier.The results are given and analyzed. The conclusion is proved that the effect of voltage of MCP on the SNR of UV image intensifier is compatible with the analysis of theory.

Citation Download Citation

Jin Zhou, Yafeng Qiu, and Xinglin Wu "Relation between signal-noise-ratio of UV image intensifier and voltage of MCP", Proc. SPIE 8761, PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering, 87610T (4 March 2013); https://doi.org/10.1117/12.2019665

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