A push-broom coded aperture spectral imaging method and device

Abstract

The invention discloses a push-broom coded aperture spectral imaging method and device, wherein the push-broom coded aperture spectral imaging method comprises: an imaging platform drives an imaging system to move horizontally relative to a scene, and the imaging system includes sequentially arranged front mirrors, Coding template, collimating mirror, beam splitting prism, imaging mirror and detector, the imaging system and imaging platform are fixed, the optical axis of the imaging system is perpendicular to the scene; the spectral data cube of the scene enters the scene coding template from the front mirror, along the scene coding template It traverses line by line, enters the beam splitting prism after passing through the collimating mirror, passes through the dispersion of the beam splitting prism, and then passes through the imaging mirror to obtain aliasing data on the detector. There are no moving parts inside the spectral imaging platform, forming a push-broom spectral imaging system, which not only retains the characteristics of high throughput and high signal-to-noise ratio of coded aperture spectral imaging, but also improves the stability and reliability of the spectral imager. Bring efficient and high-quality imaging methods.

Description

technical field [0001] The invention relates to the technical field of imaging spectrometers, in particular to a push-broom coded aperture spectral imaging method and device. Background technique [0002] Coded aperture spectral imaging technology is a research hotspot in the field of spectral imaging technology in recent years. This technology uses two-dimensional coded templates to replace the slits of traditional spectral imagers, making the system have high luminous flux and signal-to-noise ratio. Therefore, it is widely used in many fields (especially It is the field of weak signal detection) with high application value and potential. [0003] The working process of the existing coded aperture spectral imager is as follows: the relative position between the coded aperture spectral imager and the target remains unchanged (staring imaging), the target light converges to the primary image plane after passing through the front mirror, and the position of the primary image p...

AI Technical Summary

Problems solved by technology

The existing coded aperture spectral imager will be affected by many external environments (such as vibration, shock, etc.) in the remote sensing application process, and the moving parts will greatly reduce the stability and reliability of the instrument

[0007] Therefore, the current application fields of the existing coded aperture spectral imaging technology are mainly ground and laboratory applications, and the application in the field of aerospace remote sensing is almost blank.

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