红外与毫米波学报2019，Vol.38Issue(1)：55-60,90,7.DOI:10.11972/j.issn.1001-9014.2019.01.010
大变倍比大相对孔径连续变焦红外光学系统研制
Realization of a continuous-zoom infrared optical system with high ratio and large relative aperture
摘要
Abstract
A newcontinuous zoom structure was described, and a newindependent zoom group was added on the classical four-group-mechanical-compensation. And larger zoom ratio was achieved by the way of two zoom groups cascading. This mathematical model was deduced. Then, according to the cooled mid-wave infrared detector, a continuous-zoom infrared optical system with large zoom ratio and large relative aperture was designed. And the problem that it's hard for a zoom optical system to achieve both large zoom ratio and large relative aperture was solved. This optical system can zoom from 6 mm to 330 mm, which means it can reach 55 x zoom ratio while the F number is 2 constantly.The working waveband was 3. 7 ～ 4. 8 μm, the cold shield efficiency was 100％. It contains only eight lenses, three of them move in order to change the focal length. The result shows that the zoom curves are quite smooth and the image quality is quite good in the whole zoom range. The laboratory test and the out-door imaging experiment shows that the image quality is quite good in the whole zoom range. It proves the application effect of this newkind of zoom model, and shows that the system reaches its design goal.关键词
光学系统/续变焦/变倍比/相对孔径Key words
infrared optical system/continuous zoom/large zoom ratio/large relative aperture分类
信息技术与安全科学引用本文复制引用
于洋,周潘伟,潘兆鑫,蹇毅..大变倍比大相对孔径连续变焦红外光学系统研制[J].红外与毫米波学报,2019,38(1):55-60,90,7.基金项目
国家十三五国防预研项目(Jzx2016-0404/Y72-2) （Jzx2016-0404/Y72-2）
上海市现场物证重点实验室基金资助项目(2017xcwzk08) （2017xcwzk08）
中国科学院青年创新促进会(2016220资助) （2016220资助）
中科院上海技术物理所三期创新项目(CX-72) （CX-72）
