联合变换相关器傅里叶变换镜头光学系统设计  

Optical Design of Fourier Transform Lens in Joint Transform Correlator

作　　者：张宁[1] 杜双[1] 范俊叶[1] 王文生[1] 

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2013年第6期28-31,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：总装"十二五"预研基金资助课题(5131xxxx103)

摘　　要：针对联合变换相关器的目标识别的设计要求,为提高联合变换相关器光学特性,本文提出三片式傅里叶变换透镜的设计。该设计根据电寻址液晶EALCD和CCD对傅里叶变换透镜的匹配要求确定设计参数。工作波长为0.6328μm,焦距200mm,全视场角4°,相对孔径1∶4。系统引入偶次非球面,使镜头结构紧凑、重量轻、筒长短。设计结果表明:在空间频率50lp/mm时,光学系统的MTF大于0.8,接近衍射极限,像质优良,满足联合变换相关器的总体设计要求。Aiming at design requirements on target recognition of the joint transform correlator, in this paper, three-pieces Fourier transform （FT） lens is proposed for improving the optical characters of joint transform correlator. The lens parameters were determined by matching requirements of Electrically Addressed Liquid Crystal Displays （EALCD） and CCD camera. Working wavelength is 0.6328gm, lens focal length is 200mm, the full field of view is 4°, and relative aperture is 1 ： 4. This system has the advantages with compact structure, small size and light weight by introducing one even aspheric surface. The design results show that the MTF of the FT lens is greater than 0.8 at the cut-off frequency 501p/ram and close to the diffraction limited curve, and the image quality is perfect, The FT lens meets the requirements of overall design of the joint transform correlator.

关 键 词：联合变换相关器 傅里叶变换镜头 非球面 MTF曲线 

分 类 号：TN216[电子电信—物理电子学]