Compressed sensing spectral measurement device and method for electro-optical control transmittance coding

Abstract

The invention belongs to the technical field of spectral measurement and in particular relates to a compressed sensing spectrum measuring device for electro-optical control transmittance coding. The device comprises a collimating lens, a polarizer, an electro-optical modulator, an analyzer, a converging lens and a photoelectric detector which are arranged in sequence. The photoelectric detector isconnected with an FPGA control and data acquisition module, the FPGA control and data acquisition module is connected with the electro-optical modulator through an LC resonance high-voltage drive circuit, and the FPGA control and data acquisition module is connected with a computer. A high-performance electro-optical modulator is designed and developed based on the basic theory of compressed sensing and spectral transmittance coding is implemented, so that the defect that the aperture coding compression spectrum measurement technology needs to adopt a dispersion light splitting element to realize coding conversion from a spectrum dimension to a space dimension is overcome, the complexity of an optical system and the cost of spectrum measurement are reduced; and high-speed spectrum measurement signal acquisition is realized by combining FPGA-based driving control with digital phase-locked amplification data processing technologies.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and in particular relates to a compressive sensing spectrum measurement device and method for electro-optic control transmittance coding. Background technique [0002] Existing typical spectral measurement techniques include the following categories: The first category is dispersion-type spectral measurement techniques. Dispersion-type spectral measurement technology is divided into prism spectral measurement technology and grating spectral measurement technology. The advantage of prism spectral measurement is that it is less affected by ambient temperature, humidity and vibration and has low cost. The disadvantage is that the slit is introduced, the luminous flux is small, the sensitivity is low, and the dispersion of the prism is nonlinear. The grating light splitting structure is simple, the measurement time is short, and it is widely used, but it also needs to introduce slits, a...

AI Technical Summary

Problems solved by technology

However, the existing liquid crystal variable phase retarder, liquid crystal tunable filter and other devices are greatly affected by the ambient temperature, and the FP resonator is sensitive to vibration interference and has limited working stability.

However, the application of spectral measurement technology in these new technology fields has put forward higher and higher application requirements for spectral resolution, spectral measurement rate, and measurement sensitivity. In particular, the miniaturization and integrated design of spectral instruments are facing unprecedented challenges

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