Abstract

This paper presents a practical method to design all-reflective dual-channel foveated imaging systems. Such a system statically has two optical channels, one with a wider field-of-view for searching and another with a long focal length for fine reconnaissance. The two channels have a common center field angle. These systems may be useful for remote sensing where coarse searching and fine observation are simultaneously needed. To demonstrate the method, two corresponding systems are designed. The results reveal an angular resolution of finer than 4 arcsec for fine observation and a zoom ratio of $2.9\times$ or $2.5\times$ between the two channels. The modulation transfer function curves of both channels are above 0.3 at 100 line pairs per millimeter (lp/mm). Freeform surfaces are adopted to improve imaging quality and obtain a proper structure for fabrication.

© 2016 Optical Society of America

Dual-sensor foveated imaging system

Hong Hua and Sheng Liu
Appl. Opt. 47(3) 317-327 (2008)

Design of a dynamic dual-foveated imaging system

Xiaoyu Du, Jun Chang, Yunqiang Zhang, Xi Wang, Bochuan Zhang, Lei Gao, and Liping Xiao
Opt. Express 23(20) 26032-26040 (2015)

Optical design and system engineering of a multiresolution foveated laparoscope

Yi Qin and Hong Hua
Appl. Opt. 55(11) 3058-3068 (2016)

Foveated scanning: dynamic monodimensional enlargement of resolved field of view in lenses of scanner systems

Farhang Javaherian and Bizhan Rashidian
Appl. Opt. 55(26) 7314-7323 (2016)

Low-cost dynamic real-time foveated imager

Yajun Niu, Jun Chang, Fengxiang Lv, Benlan Shen, and Weilin Chen
Appl. Opt. 56(28) 7915-7920 (2017)