A Polarization Spectral Imaging Measurement Structure Based on Magnetic Rotation and AOTF

Abstract

The invention provides a polarization spectral imaging measuring structure based on magnetic vortice light and an AOTF and belongs to the technical field of polarization spectral imaging measuring structures. According to the polarization spectral imaging measuring structure based on magnetic vortice light and the AOTF, magnetic vortice light coil voltage and the driving frequency of the AOTF are completely controlled by a computer to achieve polarization spectral imaging, no moving component is needed, and only an area array photoelectric detector is needed; the polarization spectral imaging measuring structure comprises a front telescoping collimation optical module, a magnetic vortice light modulator, the AOTF, a light barrier, an imaging optical module, the area array photoelectric detector and the control computer, and the front telescoping collimation optical module, the magnetic vortice light modulator, the AOTF, the light barrier, the imaging optical module and the area array photoelectric detector are arranged in sequence, and the area array photoelectric detector is connected with the control computer. The polarization spectral imaging measuring structure is mainly applied to polarization spectral imaging measuring.

Description

technical field [0001] The invention discloses a polarization spectrum imaging measurement structure based on magneto-optical rotation and AOTF, which belongs to the technical field of polarization spectrum imaging measurement structure. Background technique [0002] Polarization spectral imaging measurement technology is a technology that simultaneously obtains polarization information, spectrum, and spatial information. Among them, polarization detection can provide more information that intensity detection cannot provide. Polarization detection has the characteristics of improving target contrast, reducing scattering, and providing various shape and direction information. Using the difference between the polarization information of the target and the background, it can be better in complex backgrounds. to detect targets and improve the accuracy of identifying targets. Therefore, polarization spectroscopy imaging measurement technology has very important application prosp...

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Problems solved by technology

[0003] The existing polarization spectrum measurement mainly has the following two types: 1. Measure I, Q and U at different wavelengths by rotating filters and polarizers, and finally realize polarization spectrum imaging with array detectors and data processing. Although the structure is simple, it needs rotating parts and the spectral resolution is low; Second, it is replaced by Acousto-Optic Tunable Filter (AOTF) and Liquid Crystal Tunable Filter (LCTF) The spectral resolution of the traditional optical filter is improved compared with that of the optical filter, and the polarization spectrum imaging is realized by rotating or adding other components (such as a liquid crystal modulator), but this method also requires rotating components or using multiple array photodetectors to realize implementation, complex

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