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Frontiers of Optoelectronics

ISSN 2095-2759

ISSN 2095-2767(Online)

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Front. Optoelectron.    2017, Vol. 10 Issue (1) : 89-94    https://doi.org/10.1007/s12200-016-0548-9
RESEARCH ARTICLE
Design and demonstration of a foveated imaging system with reflective spatial light modulator
Xi WANG1,Jun CHANG1(),Yajun NIU1,Xiaoyu DU1,Ke ZHANG2,Guijuan XIE1,Bochuan ZHANG3
1. School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China
2. China North Vehicle Research Institute, Beijing 100072, China
3. Beijing Aerospace Automatic Control Institute, Beijing 100854, China
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Abstract

In this paper, a foveated imaging system using a reflective liquid crystal spatial light modulator (SLM) was designed. To demonstrate the concept of foveated imaging, we simulated with software Code V and established a laboratory prototype. The result of the experiment shows that an SLM can be used to correct the aberration of region of interest (ROI) while the resolution of other area was still very low. The vary-resolution system was relative simple compared to the traditional high resolution system and obviously can reduce the amount of data transmission. Such systems will have wide application prospect in various fields.
Keywords optical design      foveated imaging      spatial light modulator (SLM)      tolerance analysis     
Corresponding Author(s): Jun CHANG   
Just Accepted Date: 20 July 2016   Online First Date: 13 September 2016    Issue Date: 17 March 2017
 Cite this article:   
Xi WANG,Jun CHANG,Yajun NIU, et al. Design and demonstration of a foveated imaging system with reflective spatial light modulator[J]. Front. Optoelectron., 2017, 10(1): 89-94.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-016-0548-9
https://academic.hep.com.cn/foe/EN/Y2017/V10/I1/89
Fig.1  Structure of foveated imaging system
Fig.2  MTF of the system before correction
Fig.3  (a) MTF after correction and (b) wave front errors before and after correction of field (-4°, -4°)
Fig.4  (a) MTF after correction and (b) wave front errors before and after correction of field (4°, 4°)
elements No. distance tolerance/mm tolerance wedge tolerance tilt
total indicated runout (TIR) arc minute total indicated runout (TIR) arc minute
1 – 0.01 3.4 0.015 5.2
2 1.00 0.04 8.4 0.041 8.6
3 5.00 0.04 11.2 0.062 17.2
4 5.00 0.07 23.7 – –
5 5.00 0.04 11.2 0.062 17.2
6 1.00 0.01 2.4 0.029 6.9
7 1.00 0.10 21.5 0.032 6.9
Tab.1  The centered and decentered tolerances of foveated imaging system
Fig.5  Structure of (a) the simulation of an infinity object and (b) a foveated imaging system
Fig.6  Images (a) before and (b,c) after correction at fields (-4°, -4°) and (4°, 4°)
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