Compact micro-snapshot channel-modulated full-polarization spectral imaging detection device and method

Abstract

The present invention discloses a compact micro snapshot type channel modulation full-polarization spectral imaging detection device and a method. The device comprises a front optical system, a microlens array, a full-polarization modulation module, an optical filter sheet array and a plane array detector which are distributed sequentially along an incident light direction; the full-polarization modulation module includes a first birefringent prism, a half-wave plate, a second birefringent prism, a second half-wave plate, a third birefringent prism, a third half-wave plate, a fourth birefringent prism and a linear polaroid which are sequentially distributed along the incident light direction and are attached to one another; the optical filter sheet array is attached to the light sensing surface of the plane array detector; the light sensing surface of the plane array detector is perpendicular to the optical axis of the detection device and is arranged at the focal plane position of the microlens array; and the plane array detector is connected with a data acquisition and processing system. With the device and method of the invention adopted, a frame of image is snapped, the image is processed through using the Fourier demodulation algorithm, so that a two-dimensional spatial polarization spectral image corresponding to all Stokes polarization parameters can be obtained.

Description

technical field [0001] The invention belongs to the field of optical remote sensing detection, and relates to a polarization imaging device used in the field of polarized radiation detection, in particular to a compact micro-snapshot type channel modulation full polarization spectrum imaging detection device capable of obtaining full polarization information of two-dimensional space objects in real time and detection method. Background technique [0002] The electromagnetic wave radiated by the object contains important remote sensing information such as the space, spectrum and polarization of the target, which can not only be used to invert the shape and physical and chemical characteristics of the target, but also remove background noise to provide high-contrast surfaces, shapes, shadows and roughness degree and other information. In order to complement the advantages of spatial, spectral and polarization three-dimensional information and enhance the ability to detect tar...

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Problems solved by technology

[0005] Current snapshot polarization spectral imaging mainly adopts dispersion spectral imaging combined with full polarization modulation, such as: channel polarization modulation computing layer spectral imaging technology [3], channel polarization modulation image segmentation spectral imaging technology [4,5], integral field of view Spectral polarization imaging technology [6,7], etc., these systems are relatively large and complex in structure

[0006] The prism-based channel polarization modulation technology has the advantages of compact structure and miniaturization [8-10], but it can only measure the full polarization information of monochromatic light; the spectral imaging technology based on filter array also has the advantage of compact structure [11- 15], but only spectral information can be measured

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