Polarization-sensitive infrared image sensor including a plurality of optical fibers
    1.
    发明授权
    Polarization-sensitive infrared image sensor including a plurality of optical fibers 有权
    包含多个光纤的偏振敏感型红外线图像传感器

    公开(公告)号:US08238026B1

    公开(公告)日:2012-08-07

    申请号:US12364537

    申请日:2009-02-03

    IPC分类号: G02B27/28

    摘要: A polarization-sensitive infrared image sensor (also termed a snapshot polarimeter) utilizing a 2-D array of polarizers to filter infrared light from a scene according to polarization, and a 2-D array of photodetectors (i.e. a focal plane array) to detect the filtered infrared light and generate polarization information which can be used to form a polarization-sensitive image of the scene. By forming each polarizer on an optical fiber in a fiber optic faceplate, the polarizers can be located facing a 2-D array of retarders to minimize diffraction effects of the infrared light. The optical fibers also guide the filtered infrared light to the photodetectors to reduce cross-talk in the polarization information. The polarizers can be formed as wire grid polarizers; and the retarders can be formed as subwavelength surface-relief gratings.

    摘要翻译: 利用偏振器的2-D阵列来根据偏振来对来自场景的红外光进行滤波的偏振敏感红外图像传感器(也称为快照偏振计)以及用于检测的二维阵列的光电检测器(即,焦平面阵列) 滤波的红外光并产生可用于形成场景的偏振敏感图像的偏振信息。 通过在光纤面板中的光纤上形成每个偏振器,偏振器可以位于面向2-D延迟器阵列的位置,以最小化红外光的衍射效应。 光纤还将滤波的红外光引导到光电检测器以减少极化信息中的串扰。 偏振器可以形成为线栅偏振器; 并且缓凝剂可以形成为亚波长表面浮雕光栅。