Imaging characteristics of ball lens

被引:1
|
作者
Li, Qinghui [1 ]
Shao, Xiaopeng [1 ]
机构
[1] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Shaanxi, Peoples R China
来源
SATELLITE DATA COMPRESSION, COMMUNICATIONS, AND PROCESSING X | 2014年 / 9124卷
关键词
computational imaging; ball lens; geometrical aberrations;
D O I
10.1117/12.2052667
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A proof-of-concept gigapixel computational camera consisting of a spherical lens shared by several small planar sensors has been reported recently. Because the resolution of spherical lens is fundamentally limited by geometric aberrations, the imaging characteristics of the ball lens are expressed by the geometrical aberrations, in which the general equations for the primary aberration of the ball lens are given. To achieve high quality imaging, the effects of lens shape, stop position, and glass material on the aberrations are discussed, respectively. The third-order and the fifth-order spherical aberration as a function of lens shape and the relative aperture are analyzed as well. The other imaging evaluation merits, such as the spot diagram, the modulation transfer function(MTF) and the encircled energy are also described.
引用
收藏
页数:9
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