Snapshot compact channel modulation optical field imaging full polarization spectrum detection device and method

Abstract

The device provides a snapshot compact channel modulation optical field imaging full polarization spectrum detection device and method. The device comprises an objective lens, an optical field modulation unit, a micro optical array, a surface array detector and a data acquisition and processing display system. The objective lens, the optical field modulation unit, the micro optical array and the surface array detector are successively arranged along the incident light direction. The optical field modulation unit is arranged at the position of the aperture stop of the objective lens. The micro optical array is arranged on the image plane position of the objective lens. The surface array detector is placed on the back focal plane of the micro optical array and is connected with the data acquisition and processing display system. The device provided by the invention is suitable for detecting the all-optical information of a dynamic or fast-changing target, can effectively avoid the negative influence caused by the target change, the jitter noise, the environment change or other factor, and has a potential application value in astronomical observation, space exploration, earth remote sensing, machine vision, biomedical diagnosis and other fields.

Description

technical field [0001] The invention belongs to the field of optical remote sensing detection, in particular to a polarization spectrum imaging device for polarization spectrum radiation detection. 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 targets in complex backgrounds, a new cutting-edge remote sensing detection technology that integrates three-dimensional information acquisition skills has emerged: polarization spectral imaging technology. Its data products can be re...

AI Technical Summary

Problems solved by technology

In 2009, literature [3] proposed to place parallel spectral filter arrays and linear polarization filter arrays at the aperture stop of the primary mirror in the device of literature [2], and use micro-aperture arrays to obtain linear polarization images and multispectral images; The device cannot obtain the information of circularly polarized light, and the polarization image is separated from the spectral image, so it cannot obtain the polarization information related to the wavelength

In 2013, the Chinese invention patent "imaging method of multi-spectral light field camera" (authorized announcement number: CN 103234527B) [9] proposed a Chinese invention patent "a snapshot-type high-throughput spectral imaging method and spectral imager" ( Authorized announcement number: CN 102944305B) [8] introduces a combined relay lens behind the device, and transfers the rear focal plane of the micro-optical array to the photosensitive surface of the detector for the second time, so as to facilitate the arrangement of the detector; but this method will increase the volume, which is not conducive to miniaturization; and this secondary imaging method is the same as the method reported in [1] in 1996. The innovation of [2] is to remove the rear secondary imaging optics of [1] and Realize system miniaturization

[0007] It can be seen that the existing compact snapshot polarization and spectral imaging device or method based on light field imaging can only obtain the information of linearly polarized light, and the linearly polarized light image and spectral image are separated and irrelevant

In 2012, Chinese Invention Patent, "Interference Light Field Imaging Hyperspectral Full Polarization Detection Device" (authorized announcement number: CN102680101B) [13] and Chinese Invention Patent, "Synchronous Polarization Modulation Interferometric Imaging Spectral Polarization Detection Device and Method" (Publication No. : CN102680101A) [14], it is proposed to utilize the transverse shearing interferometer of imaging type to receive the separated image points of the back focal plane of the microlens in the device in [2], and place the fully polarized The modulating element is used to obtain the spectral image of the full Stokes polarization parameters; however, since the transverse shearing interferometer needs to scan the target to obtain the interferogram corresponding to the entire optical path difference, the devices reported in the two invention patents need to adopt a time-sequential acquisition method, Snapshot acquisition cannot be achieved, and the system is complex and large in size

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