Optical system of high contrast dynamic star simulator based on LCOS splicing technology

被引：10

作者：

Meng Y. ^{[1
]}

Zhang G.-Y. ^{[1
,2
]}

Sun G.-F. ^{[1
,2
]}

Liu S. ^{[1
]}

机构：

[1] College of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun

[2] Jilin Engineering Research Center of Photoelectric Measurement and Control Instruments, Changchun

来源：

Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2016年 / 24卷 / 03期

关键词：

Liquid Crystal on Silicon (LCOS) splicing technology; Optical system design; Polarization degree; Star map recognition; Star simulator; Stray light;

D O I：

10.3788/OPE.20162403.0511

中图分类号：

学科分类号：

摘要：

The dynamic star simulator based on Liquid Crystal on Silicon LCOS splicing technology has low contrast, and it can not provide all effective targets for the star sensor in star map recognition. Thus a method for improving the contrast of the dynamic star simulator by suppressing stray lights was put forwarded. The influence of the polarization degree on stray light was discussed in detail, and the function of the polarization degree and the angle of incidence was derived. The optical system for stray light suppression was designed, including a lighting source designed by combination of a Compound Parabolic Concentrator (CPC) and a telescopic system, a 1/4 wave plate with combination of multi-prisms, and a collimating system with field angle greater than 11°. The MTF of the collimating system is greater than 0.7 when the edge frequency is 60 lp/mm and the field angle is less than ±5°. The experiments show that the angle distance error between stars of the high contrast dynamic star simulator based on LCOS splicing is less than 18", and its stray light energy is reduced by 2.38 times as compared with those of conventional star simulators. These results indicate that the high contrast dynamic star simulator based on LCOS splicing can not only reduce the background noise of dynamic star simulator effectively, but also can improve the recognition rate of star map. Consequently, it meets the requirements of dynamic star simulator in all magnitude levels for high dynamic characteristics and high precisions. © 2016, Chinese Academy of Sciences. All right reserved.

引用

页码：511 / 520

页数：9

共 12 条

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