Full-Stokes interference imaging spectral device and method based on time-sharing polarization modulation

基于分时偏振调制的全斯托克斯干涉成像光谱装置及方法

Abstract

本发明公开了一种基于分时偏振调制的全斯托克斯干涉成像光谱装置及方法,包括分时偏振调制装置和无狭缝的Sagnac干涉成像光谱装置。其中,分时偏振调制装置由可旋转的相位延迟器和固定线偏振片组成;Sagnac干涉成像光谱装置由两个成像物镜、准直物镜、Sagnac剪切分束器和成像探测器组成。待测目标光束入射到分时偏振调制装置,产生四个不同的偏振态,再经过干涉成像光谱装置,在成像探测器靶面上得到四组携带不同偏振态信息和干涉信息的目标图像,经过数据处理,最终得到探测目标场景的四维光信息,即二维空间信息、各点的光谱信息和各个谱段的全Stokes偏振信息。本发明具有高光通量,高空间分辨率等优点。
The invention discloses a full-Stokes interference imaging spectral device and a method based on time-sharing polarization modulation. The full-Stokes interference imaging spectral device comprises a time-sharing polarization modulation device and a slit-free Sagnac interference imaging spectral device. The time-sharing polarization modulation device can be composed of a rotatable phase delayer and a fixed linear polarizer. The Sagnac interference imaging spectral device is composed of two imaging objective lens, a collimating objective lens, a Sagnac shear beam splitter, and an imaging detector. A target beam to be detected is incident on the time-sharing polarization modulation device to generate four different polarization states; after the target beam to be detected passes through the interference imaging spectral device, four groups of target images carrying different polarization state information and interference information are obtained on the target surface of the imaging detector; and through data processing, four-dimensional light information of a detection target scene is obtained ultimately, namely, two-dimensional spatial information, spectral information of each point, and full-Stokes polarization information of each spectrum. The full-Stokes interference imaging spectral device of the invention has the advantages of high luminous flux, high spatial resolution, and the like.

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    CN-105387936-AMarch 09, 2016南京理工大学High-flux Sagnac interference imaging spectrum apparatus
    CN-105404014-AMarch 16, 2016南京理工大学Full Stokes polarization modulation imaging beam splitter with high spatial resolution