Tunable-liquid-crystal-filter-based low-light-level color night vision system and its image processing method

2019 ◽  
Vol 58 (18) ◽  
pp. 4947
Author(s):  
Tao Yuan ◽  
Zhenghao Han ◽  
Li Li ◽  
Weiqi Jin ◽  
Xia Wang ◽  
...  
2014 ◽  
Vol 568-570 ◽  
pp. 598-603
Author(s):  
Juan Li ◽  
Zhao Hui Liu ◽  
Chao Mei

Two camera lenses for 3D low light level color night vision system are designed in CODE V. The panchromatic sensitive camera lens works in a wide spectral band 400nm-1000nm, yellow green-sensitive camera lens works in a band of 400nm-600nm.The two camera lenses have same parameters, such as focal length 120mm, relative aperture 1/2, the field angle of 5.26 °. In the design of two camera lenses, we split and complex cooke triplet lens, the chromatic aberration is balanced by adding a binary diffractive surface. The results of design show that sensitive panchromatic camera lens and yellow-green-sensitive camera lens, in the all field of view, when the Nyquist frequency is 77.5 (lp / mm), all MTF is larger than 0.6; the axial chromatic aberration of sensitive panchromatic camera lens is 0.056mm. Two camera lenses have good imaging performance.


2001 ◽  
Author(s):  
Lianfa Bai ◽  
Qian Chen ◽  
Guohua Gu ◽  
Baomin Zhang

2010 ◽  
Vol 37 (1) ◽  
pp. 312-315
Author(s):  
刘伟 Liu Wei ◽  
付江涛 Fu Jiangtao ◽  
常本康 Chang Benkang

2017 ◽  
Vol 46 (8) ◽  
pp. 804002 ◽  
Author(s):  
鲁佳颖 Lu Jiaying ◽  
谷小婧 Gu Xiaojing ◽  
顾幸生 Gu Xingsheng

2015 ◽  
Vol 36 (3) ◽  
pp. 430-434
Author(s):  
Chen Yi-chao ◽  
Hu Wen-gang ◽  
Wu Dong-sheng ◽  
He Yong-qiang ◽  
Zhang Dong-xiao ◽  
...  

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