Multi-slit polarization imaging spectrometer based on Amici prism splitting

Abstract

The invention discloses a multi-slit polarization imaging spectrometer based on Amici prism splitting. The multi-slit polarization imaging spectrometer consists of a prepositive teleobjective, polarizing multi-slits, a collimating lens, double Amici prisms, an imaging lens and a detector. An infinite target scene is imaged on a single image plane through the prepositive teleobjective by optical radiation, the single image plane is provided with the polarizing multi-slits, beams emit in parallel from the collimating lens for splitting by the double Amici prisms through the polarizing multi-slits, the split beams get through the imaging lens, and polarizing spectral information of the target scene is obtained by the detector. The double Amici prisms are composed of three dispersive prisms in type of symmetric prisms, and the polarizing multi-slits are of three-slit structure. The multi-slit polarization imaging spectrometer achieves a wider field range with the combination of the polarizing multi-slits and the double Amici prisms. A single exposure can directly obtains the three pieces of polarization information of the target scene, and septuple space information of the target scene can be achieved with push-scanning of the whole apparatus.

Description

technical field [0001] The invention relates to the technical field of spectral imaging, in particular to a multi-slit polarization imaging spectrometer based on Amici prism light splitting. Background technique [0002] Imaging spectroscopy technology emerged in the 1980s. This technology integrates optics, spectroscopy, precision machinery, electronic technology and computer technology. It is an innovation based on multidisciplinary integration. Imaging spectrometer is an optical remote sensing instrument that can obtain two-dimensional spatial information and one-dimensional spectral information of the measured target, and the image data obtained is called "Data Cube". [0003] Polarization is one of the inherent characteristics of light. The interaction between light and medium affects the polarization state of light, and its change mode and degree are closely related to the physical properties of the medium. Due to the different roughness characteristics of camouflage ...

AI Technical Summary

Problems solved by technology

The principle of single prism dispersion is simple and easy to apply, but there are many unavoidable defects, such as: the spectral resolution is seriously nonlinear, and the spectral resolution at the short wavelength and the long wavelength can differ by as much as 10 times; The spatial incident angle corresponding to the field angle is different, causing the spectral line to bend; the angular magnification of different spectral bands is different, resulting in color distortion, etc.

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