Dual-channel interferometric hyperspectral imaging device and method

Abstract

The invention discloses a dual-channel interference type hyperspectral imaging device and method. The device includes a front imaging objective lens, a first filter array, a diaphragm, a collimating objective lens, a polarizer, and a first imaging objective lens sequentially arranged along the optical axis direction. Two optical filter arrays, a birefringent shearer array, an analyzer, a rear imaging objective lens and an area detector array. The incident light is imaged at the diaphragm through the pre-imaging objective lens, passes through the two filters on the diaphragm and the collimating objective lens, and becomes two beams of parallel light with different wavelength bands, passes through the polarizer and then passes through the two filters respectively. When incident to the corresponding birefringent shearer, the beam is sheared into two groups of polarized light with different wavelength bands and a certain optical path difference, and is imaged by the analyzer and post-imaging objective lens to generate two sets of interference information on the surface detector. Finally, the spectral information of the target to be measured is obtained through spectral restoration. The present invention adopts two sets of birefringent shearers to obtain two sets of interferograms with different shear amounts in one push-broom imaging, realizes dual-channel imaging, and improves spectral resolution.

Description

technical field [0001] The invention belongs to the field of optical imaging detection, in particular to a dual-channel interference type hyperspectral imaging device and method. Background technique [0002] Imaging spectroscopy technology combines imaging technology with spectral technology, and can obtain two-dimensional spatial information and one-dimensional spectral information of the target at the same time, which plays a very important role in the analysis of the spatial and spectral characteristics of the target, so that the target can be identified The type, material, state, etc. have been widely used in remote sensing detection, environmental monitoring, biomedicine and other fields. [0003] Spectral detectors based on imaging spectroscopy are called imaging spectrometers. The most common imaging spectrometers are dispersive imaging spectrometers and interferometric imaging spectrometers. Dispersive imaging spectrometers use prisms or gratings as dispersive elem...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hyperspectral imaging device that overcomes the shortcoming of long-band spectral resolution reduction in existing interferometric imaging spectrometers, realizes dual-channel imaging of the target spectrum, and significantly improves the spectral resolution and imaging signal-to-noise ratio of the system and method

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