Electricity structure for improving DMD Hadamard transformation spectrograph coding efficiency

Abstract

The invention discloses an electricity structure for improving the DMD Hadamard transformation spectrograph coding efficiency, and belongs to the technical field of photoelectric instrument manufacturing. In order to solve the problem that in the prior art, a Hadamard transformation spectrograph is quite long in encoding and collecting time and controls an FPGA to prestore Hadamard coding stripe data in a FLASH, the electricity structure is provided. A Cortex-M3 sends a coding beginning instruction to the FPGA through an RS-232, after the FPGA receives the instruction, 255-frame coding stripe data in the FLASH are read in a DDR2 internal storage, a DAD drives a DMD to play coding stripes for coding of spectra, when the DMD is stabilized, the FPGA sends a synchronizing signal to trigger the Cortex-M3 to collect spectrum signals, signals collected by a detector are amplified by a direct-current amplifying circuit and converted through an ADC to obtain digital signals, finally, the measured signals are stored in the Cortex-M3, and decoding is performed after coding is completed.

Description

technical field [0001] The invention relates to an electrical structure for improving the coding efficiency of a DMD Hadamard transform spectrometer, and belongs to the technical field of photoelectric instrument manufacturing. Background technique [0002] The Hadamard transform spectrometer, like the Fourier transform spectrometer, is a new type of digital transform spectrometer. Due to the introduction of the DMD optical splitting device, the Hadamard code becomes flexible and easy to program and control. The DMD spatial light modulator contains a large number of tiny independent movable lenses, which are controlled by the circuit and can guide the light to two different paths to complete the digital code control of the spectrum. Many experts and scholars at home and abroad have studied the Hadamard transform spectrum of DMD. In China, the imaging spectrometer of Xi'an Institute of Optics and Mechanics and the spectrometer of Chongqing University are mainly developed. ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the encoding and acquisition time of the Hadamard transform spectrometer in the prior art is very long and cannot satisfy a large number of real-time measurements, the present invention provides an electrical structure that improves the encoding efficiency of the DMD Hadamard transform spectrometer

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