Electricity structure for improving DMD Hadamard transformation spectrograph coding efficiency

A coding efficiency and spectrometer technology, applied in the field of optoelectronic instrument manufacturing, can solve the problems of long acquisition time, unable to satisfy a large number of real-time measurements, etc., and achieve the effect of improving the acquisition frame rate

Inactive Publication Date: 2014-07-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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 larg

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  • Electricity structure for improving DMD Hadamard transformation spectrograph coding efficiency
  • Electricity structure for improving DMD Hadamard transformation spectrograph coding efficiency

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Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0012] Such as figure 1 As shown, the main control board is composed of Cortex-M3 chip 1, ADC chip 2, amplifier circuit 3 and detector 4; the DMD control board is composed of programmable FPGA6, high-speed onboard DDR2 memory 5, large-capacity FLASH7, DAD8 and DMD9 .

[0013] The Cortex-M3 chip 1 integrates codes that control each component of the spectrometer and can store spectral data. Cortex-M3 chip 1 has three functions: ①It can communicate with the host computer through USB data line; ②It can communicate with FPGA6 through RS-232; ③Control the spectral detection system to collect data to the register.

[0014] The ADC chip 2, the amplifier circuit 3 and the detector 4 constitute a spectral detection system.

[0015] The ADC chip 2 is an analog-to-digital converter, which converts an analog signal into a digital signal.

[0016] The amplification cir...

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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. ...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/28
Inventor 刘华全向前许家林卢振武王晓朵党博石
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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