中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共5条，第1-5条 帮助

条数/页： 排序方式：
Optical image reconstruction using an astigmatic lens for synthetic-aperture imaging ladar 期刊论文  OAI收割
opt. commun., 2014, 卷号: 331, 页码: 114
作者:  Sun, Zhiwei;  Hou, Peipei;  Zhi, Yanan;  Sun, Jianfeng;  Zhou, Yu
收藏  |  浏览/下载：19/0  |  提交时间：2016/11/28
Focusing of aberrated, partially coherent, square, flat-topped pulsed beams by a thin lens 期刊论文  OAI收割
chin. opt. lett., 2014, 卷号: 12, 页码: s11401
作者:  Zhang, Guowen;  Lu, Xingqiang;  Zhou, Shenlei;  Ma, Weixin;  Zhu, Jian
收藏  |  浏览/下载：32/0  |  提交时间：2016/11/28
Focusing of aberrated, partially coherent, square, flat-topped pulsed beams by a thin lens 期刊论文  OAI收割
chin. opt. lett., 2014, 卷号: 12, 页码: s11401
作者:  Zhang, Guowen;  Lu, Xingqiang;  Zhou, Shenlei;  Ma, Weixin;  Zhu, Jian
收藏  |  浏览/下载：28/0  |  提交时间：2016/11/28
Optical image reconstruction using an astigmatic lens for synthetic-aperture imaging ladar 期刊论文  OAI收割
opt. commun., 2014, 卷号: 331, 页码: 114
作者:  Sun, Zhiwei;  Hou, Peipei;  Zhi, Yanan;  Sun, Jianfeng;  Zhou, Yu
收藏  |  浏览/下载：28/0  |  提交时间：2016/11/28
Design of dual-FOV refractive/diffractive LWIR optical system (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  Wang L.-J.;  Zhang J.-P.;  Wang L.-J.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25
An infrared-optical zoom system using binary element is proposed in this paper. The two main advantages of the zoom system introducing here are: bigger F-number and lower cost. The primary optical properties are: F/#=1  Second  Others  zoom ratio =1:4  binary element is used to correct the chromatical aberration by taking the advantage of negative dispersion characteristics and the cost of the system is lower than that of conventional ones with Zinc Selenide (Znse) material at the same level. In the binary element is rotational symmetric with one step which is easy to fabricate  in order to balance 5th spherical aberration  and dual field are 26.6 and 5.6respectively. Wider field of view is used for search and the smaller one is used for imaging details. This system uses un-cooled infrared detector with 320240 pixels and 45m pixel size. The F-number matches the sensitivity range of the detector array. Three aspects are considered during design process to make the system more satisfactory and more achievable. First  5th coma aberration and 5th astigmatic aberration  the manner of zoom is accomplished by exchanging tow lenses into the smaller field of view system layout. The lens exchange manner faces the requirement of simple system structure and good image quality in both focal points. It can also make the system more feasible in the alignment process than mechanical-zooming manner and optical-zooming manner  high-order asphere surfaces with 2th order to 10 th order are also hired in the system. Asphere surface is useful in compressing the system and improving optical system transmittance. This kind asphere surface is on industrial level featuring low cost and easy to fabricate. It is shown that good image quality can achieved by implementing five Germanium lenses and the transmittance of system is 72%. All aberrations are diffraction-limited  both spherical aberration and astigmatic aberration are corrected. When the field of view(FOV) is 26.6 and the focal length is 152mm  MTF at Nyquist frequency(11lp/mm) is great than 0.7. The spherical aberration is -0.0073. The coma aberration is 0.0978 and the astigmatic aberration is -0.013. When the field of view(FOV) is 5.6 and the focal length is 38mm  MTF at Nyquist frequency is great than 0.8 with spherical aberration -0.0046  the coma aberration 0.055 and astigmatic aberration 0.034.