A Diffraction-Based Spectrally Encoded Imaging System and Method

Abstract

The invention discloses a diffraction-based spectral encoding imaging system and method. The method includes the following steps: (1) using the constructive interference wavelength arrangement method to obtain a coded diffraction element; (2) building an imaging system for calibrating the point spread function; (3) using the imaging system for calibrating the point spread function to perform spectral calibration experiments and spectral The image acquisition experiment obtained point spread functions and spectral aliasing images of different bands respectively; (4) according to the point spread functions of different bands, the hyperspectral image reconstruction network algorithm was used to process the spectral aliasing images to obtain hyperspectral images in different bands . The invention solves the problem of complex structure of the traditional spectral imaging system and low timeliness of spectral information acquisition; the structural design of the diffraction element in the invention is beneficial to the effect of the reconstruction network algorithm and the processing of the diffraction element; and the obtained hyperspectral image is accurate and clear , has a wider spectral range and high robustness.

Description

Technical field [0001] The present invention relates to a system and method for spectral imaging spectral imaging art, particularly it relates to an imaging system and a spectral coding method based on diffraction. Background technique [0002] Spectral imaging is a new technology using a single or a plurality of spectral channels for spectral data acquisition and processing, analysis and interpretation of the image display techniques. Its main purpose is to obtain a continuous spectrum of each pixel data almost at the same time get a lot of narrow-band continuous spectrum target image, the current spectral imaging technology is mainly used hyperspectral airborne remote sensing fields. [0003] Spectral imaging system is currently facing several major technical difficulties: First, push-broom and sweep pendulum-like structure is too large and complex system, we can not match the aviation and aerospace fields, smaller and lighter requirements. Second, due to the limitations of the...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems in the background technology, the structure of the traditional spectral imaging system is complex, the timeliness of spectral information acquisition is low, the structure of the diffraction element in the rotational diffraction is complex and difficult to process, the reconstruction effect still has room for improvement, and the calibration of the point spread function has limitations. The spectral imaging range is not wide enough, etc., the present invention adopts a diffraction-based spectral encoding imaging system and method

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