Share Email Print
cover

Proceedings Paper

The theoretical simulation on electrostatic distribution of 1st proximity region in proximity focusing low-light-level image intensifier
Author(s): Liandong Zhang; Xiaofeng Bai; De Song; Shencheng Fu; Ye Li; Qingduo Duanmu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Low-light-level night vision technology is magnifying low light level signal large enough to be seen by naked eye, which uses the photons - photoelectron as information carrier. Until the micro-channel plate was invented, it has been possibility for the realization of high performance and miniaturization of low-light-level night vision device. The device is double-proximity focusing low-light-level image intensifier which places a micro-channel plate close to photocathode and phosphor screen. The advantages of proximity focusing low-light-level night vision are small size, light weight, small power consumption, no distortion, fast response speed, wide dynamic range and so on. It is placed parallel to each other for Micro-channel plate (both sides of it with metal electrode), the photocathode and the phosphor screen are placed parallel to each other. The voltage is applied between photocathode and the input of micro-channel plate when image intensifier works. The emission electron excited by photo on the photocathode move towards to micro-channel plate under the electric field in 1st proximity focusing region, and then it is multiplied through the micro-channel. The movement locus of emission electrons can be calculated and simulated when the distributions of electrostatic field equipotential lines are determined in the 1st proximity focusing region. Furthermore the resolution of image tube can be determined. However the distributions of electrostatic fields and equipotential lines are complex due to a lot of micro-channel existing in the micro channel plate. This paper simulates electrostatic distribution of 1st proximity region in double-proximity focusing low-light-level image intensifier with the finite element simulation analysis software Ansoft maxwell 3D. The electrostatic field distributions of 1st proximity region are compared when the micro-channel plates’ pore size, spacing and inclination angle ranged. We believe that the electron beam movement trajectory in 1st proximity region will be better simulated when the electronic electrostatic fields are simulated.

Paper Details

Date Published: 4 March 2015
PDF: 9 pages
Proc. SPIE 9521, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part I, 952102 (4 March 2015); doi: 10.1117/12.2087010
Show Author Affiliations
Liandong Zhang, Science and Technology on Low-Light-Level Night Vision Lab. (China)
Changchun Univ. of Science and Technology (China)
Xiaofeng Bai, Science and Technology on Low-Light-Level Night Vision Lab. (China)
De Song, Science and Technology on Low-Light-Level Night Vision Lab. (China)
Changchun Univ. of Science and Technology (China)
Shencheng Fu, Changchun Univ. of Science and Technology (China)
Ye Li, Changchun Univ. of Science and Technology (China)
Qingduo Duanmu, Changchun Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 9521:
Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part I
Xun Hou; Zhihong Wang; Lingan Wu; Jing Ma, Editor(s)

© SPIE. Terms of Use
Back to Top