A super-resolution polarization spectroscopy imaging device based on a special-shaped immersion grating

Abstract

The present invention discloses a super-resolution polarization spectrum imaging apparatus based on a special-shaped immersion grating, including: an entrance slit, a collimating mirror-a focusing lens, a special-shaped immersion grating, a focusing lens, and a detector. The entrance slit is disposed in the front of the collimating mirror-the focusing lens. The special-shaped immersion grating isdisposed behind the collimating mirror-the focusing lens. The focusing lens is disposed on a reflected light path of the special-shaped immersion grating. There is a plurality of detectors. The detector is disposed behind the focusing lens and in the front of the collimating mirror-the focusing lens. The special-shaped immersion grating is a special-shaped immersion grating based on a Brewster angle. The present invention obtains linearly polarized light by using a polarization feature of the Brewster angle to combine a polarizer and the grating into one. Spectral resolution can be improved byn times, and n is a refractive index of a material of the special-shaped immersion grating. An application advantage of the immersion grating can be extended from an infrared spectrum to a visible spectrum of a material with a relatively low refractive index.

Description

technical field

[0001] The invention belongs to the technical field of polarization spectrum information, and in particular relates to a super-resolution polarization spectrum imaging device based on an anamorphic immersion grating (A-IG grating, Anamorphic Immersion Grating). Background technique

[0002] Many remote sensing observation tasks, especially those aimed at monitoring the composition of the Earth's atmosphere, usually require ultra-fine spectral data to invert and analyze the scattering, transmission, and absorption spectra of the Earth's atmosphere, which requires instruments with very high spectral resolution. This type of spectrometer usually chooses a grating as the dispersive element. It can be seen from the principle of grating spectroscopic separation that while taking advantage of its high resolution capability and wide spectral range, high spectral resolution will inevitably lead to a large optical system size. If the grating can provide a large spectr...

Examples

Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] see figure 1 and figure 2 , a polarized hyperspectral imaging device based on a special-shaped immersion grating of the present invention, comprising: entrance pupil 4, front optical system 5, entrance slit 6, collimator-focus lens 7, BAIG 8, focus lens 9 and Detector 10. The working principle of the selected special-shaped immersion grating in the present invention is as follows: figure 2 Shown, including substrate, prism and grating.

[0027] The incident light enters the front optical system 5 after passing through the entrance pupil 4, and the entrance pupil 4 is set at the front optical system 5; the front optical system 5 is set in front of the entrance slit 6, and the incident light passes through the front optical system 5 into the entrance slit 6. The incident slit 6 is arranged in front of the collimating mirro...

technical field

[0001] The invention belongs to the technical field of polarization spectrum information, and in particular relates to a super-resolution polarization spectrum imaging device based on an anamorphic immersion grating (A-IG grating, Anamorphic Immersion Grating). Background technique

[0002] Many remote sensing observation tasks, especially those aimed at monitoring the composition of the Earth's atmosphere, usually require ultra-fine spectral data to invert and analyze the scattering, transmission, and absorption spectra of the Earth's atmosphere, which requires instruments with very high spectral resolution. This type of spectrometer usually chooses a grating as the dispersive element. It can be seen from the principle of grating spectroscopic separation that while taking advantage of its high resolution capability and wide spectral range, high spectral resolution will inevitably lead to a large optical system size. If the grating can provide a large spectr...

Examples

Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] see figure 1 and figure 2 , a polarized hyperspectral imaging device based on a special-shaped immersion grating of the present invention, comprising: entrance pupil 4, front optical system 5, entrance slit 6, collimator-focus lens 7, BAIG 8, focus lens 9 and Detector 10. The working principle of the selected special-shaped immersion grating in the present invention is as follows: figure 2 Shown, including substrate, prism and grating.

[0027] The incident light enters the front optical system 5 after passing through the entrance pupil 4, and the entrance pupil 4 is set at the front optical system 5; the front optical system 5 is set in front of the entrance slit 6, and the incident light passes through the front optical system 5 into the entrance slit 6. The incident slit 6 is arranged in front of the collimating mirro...

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