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非制冷高变倍比连续变焦光学系统的设计
引用本文:张良,刘红霞. 非制冷高变倍比连续变焦光学系统的设计[J]. 应用光学, 2012, 33(2): 250-254
作者姓名:张良  刘红霞
作者单位:1.中国航空工业集团公司洛阳电光设备研究所,河南 洛阳 471009
摘    要:
针对长波非制冷氧化钒320240像元焦平面阵列探测器,像元间距25 m25 m,采用变焦距光学系统设计原理,引入非球面和衍射面设计技术进行像差平衡,设计了长波红外连续变焦光学系统。该系统工作波段为8 m~12 m,视场为2.86~50连续可变,F数为1.2,变倍比为18∶1,在整个变焦范围内,光学调制传递函数在0.5以上,接近衍射极限,并且全视场能量70%集中在探测器的一个像元内。整个变焦光学系统仅使用一种红外材料(单晶锗)进行像差矫正。

关 键 词:非制冷   变焦距系统   光学设计
收稿时间:2011-09-28

Optical design of uncooled high zoom ratio continuous-zoom lens
ZHANG Liang , LIU Hong-xia. Optical design of uncooled high zoom ratio continuous-zoom lens[J]. Journal of Applied Optics, 2012, 33(2): 250-254
Authors:ZHANG Liang    LIU Hong-xia
Affiliation:1.Luoyang electro-optical equipment research institute of AVIC,Luoyang 471009,China
Abstract:
Aiming at the long-wave uncooled vanadium oxide focal plane arrays ( FPA) detector with 320×240 pixels and 25 μm×25 μm pixel pitch, an long-wave infrared continuous zoom optical system is designed, based on the optical zoom theory, as well as the aspheric and diffractive aberration balancing method. Its spectral range is 8 μm~12 μm, field of view(FOV) is 2.86°~50°,F number is 1.2 and zoom ratio is 18∶1. In the all optical zoom range, the modulation transfer function (MTF) is above 0.5 approaching the diffraction limit, and 70 % of the encircled energy is concentrated in one pixel of detector. Moreover, only one common infrared material of germanium is used to balance the aberration.
Keywords:uncooled  zoom system  optical design
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