摘要
设计了红外连续变焦光学系统,该系统具有镜片少、透过率高、连续变焦倍率大、波段广、相对孔径大等突出特点.二元面和非球面的引入,使系统在不同变焦结构时14 lp/mm处的MTF均大于0.6,很好地校正了系统的色差和轴外像差.该系统在仅使用4片镜片的情况下,实现了8倍连续变焦,系统透过率高于80%.结果表明该变焦系统具有良好的成像质量.
An infrared continuous zoom system is designed. The simple system has a large relative aperture with high transmittance, large continuous zoom ratio, and wide wave band. By introducing a diffractive surface and an aspheric surface, the modulation transfer function （MTF） of the system is above 0.6 for all continuous zoom ratios at the spatial frequency of 14lp/mm. As the system only contains 4 lenses, the transmittance is higher than 80%, and the zoom ratio of the system could also reach 8 continuously. As the color and the off-axis aberration are well corrected, the experiment indicates that the image aualitv of the continuous zoom system is orettv well.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第5期421-424,436,共5页
Journal of Infrared and Millimeter Waves
基金
南京电子技术研究所控课题预研基金~~
关键词
光学设计
变焦系统
连续变焦
红外
衍射光学元件
无热化
optical design
zoom lenses
continuous-zoom
infrared
diffractive optical element
athermalization
