光子集成干涉阵列视场拼接子孔径光路设计  

Photonic-integrated interferometric array field-of-view splicing subaperture optical path design

作　　者：韩耀辉 王鹍[1] 朱友强 刘欣悦[1,2] HAN Yao-hui;WANG Kun;ZHU You-qiang;LIU Xin-yue(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国光学（中英文）》2024年第6期1458-1466,共9页Chinese Optics

基　　金：国家自然科学基金资助项目(No.12204476)。

摘　　要：光子集成干涉成像系统一般是在子孔径焦平面处加单模光纤阵列,通过接收不同视场角的光束完成大视场拼接成像,但直接采用光纤阵列会导致成像视场不连续、子孔径焦距变长、厚度大幅度增加。针对以上问题,本文提出了一种结合微透镜阵列和光纤阵列对子孔径像面细分的方法以实现视场无缝拼接,并通过摄远物镜和三透镜空间压缩板组合大幅度降低了子孔径阵列的整体厚度。设计结果表明:通过在光纤阵列前加65×65的微透镜阵列对光束进行二次聚焦能够实现系统视场无缝拼接,视场扩大65倍后,全视场为0.0489°;可见光入射时单模光纤阵列中各光纤中心空间光耦合效率不低于40%;在加入空间压缩板压缩自由空间光路后,系统的整体厚度压缩了1个数量级。该系统在实现光子集成干涉成像系统大视场无缝拼接成像的同时,为解决超长焦距镜头过厚的问题提供了新的思路。The photonic integrated interferometric imaging system generally adds single-mode fiber arrays at the focal plane of the subaperture and completes the large-field-of-view splicing imaging by receiving beams with different field-of-view angles.However,the direct use of fiber arrays leads to discontinuity of the imaging field-of-view and causes the focal length of the subaperture to lengthen,and the thickness is increased substantially.To address the above problems,we propose a combination of microlens arrays and fiber optic arrays to subdivide the subaperture image plane to achieve a seamless splicing of the field-of-view,and to significantly reduces the overall thickness of the subaperture array through the combination of the telephoto objective lens and the three-lens spatial compression plate.The design results show that by adding 65×65 microlens array in front of the fiber array to focus the beam twice to achieve the system field of view seamless splicing,the field of view is expanded 65 times,the full field of view is 0.0489°,the efficiency of spatial optical coupling in the center of each fiber in the single-mode fiber array is not less than 40%when the visible light is incident,and after adding the spatial compression plate to compress the free-space light path,the overall thickness of the system achieves one order of magnitude compression.This design realizes photonic integrated interference imaging system large field of view seamless splicing imaging at the same time,provides a new way for the solution of the problem of excessive thickness in ultra-long focal length lenses.

关 键 词：光学设计 合成孔径 长焦距 可见光成像 光纤耦合 

分 类 号：O439[机械工程—光学工程] TN256[理学—光学]