A Multi-channel Aperture Coding Method in Imaging Spectroscopy System

Abstract

The invention discloses a multichannel aperture encoding method in an imaging spectrum system. The method includes the steps of firstly, the longest linear displacement register sequence is used to construct a circulating matrix to service as an encoding template; secondly, a mainframe judges according to the different instantaneity requirements of the imaging spectrum system, selects one cache strategy to configure a FPGA, and pre-stores the encoding template of certain frames into a mounted large-capacity data storage; thirdly, the large-capacity data storage and an input-output cache build a high-speed data transmission path according to the selected cache strategy. The method has the advantages that the encoding template is high in signal-to-noise ratio, multichannel and easy to implement on DMD; the cache strategy is applicable to the different instantaneity requirements, front-end data writing interruption is avoided, and rear-end DMD template data loading is continuous without pause in frames.

Description

Technical field: [0001] The invention relates to a multi-channel coded aperture technology, in particular to a multi-channel aperture coded method in an imaging spectrum system, which is mainly used to provide a coded aperture of a spectrum dimension or a space dimension for a high signal-to-noise ratio imaging spectrum system. Background technique: [0002] Traditional dispersion-based imaging spectrometers are generally divided into two types according to the imaging method: optical-mechanical scanning method and push-broom method. The scanning mirror of the optical-mechanical scanning imaging spectrometer quickly scans from one end of the swath to the other end to complete the imaging in the spatial dimension of the through-orbit direction, while the movement of the airborne or space-borne platform completes the imaging in the spatial dimension of the orbital direction. Due to the fast scanning speed in the direction of the track, the dwell time of the detector for each s...

AI Technical Summary

Problems solved by technology

The entire micromirror array has the ability of fast flipping and high-speed modulation, but if the front-end controller lacks a high-speed data transmission path and a corresponding buffer strategy, it will seriously restrict the coding performance of the coded aperture system, thereby affecting the performance of the imaging spectrum system. Signal-to-noise ratio and real-time performance, etc.

Images