High-sensitivity light spectrum acquisition and test system with board waveband covering visible light

Abstract

The invention discloses a high-sensitivity light spectrum acquisition and test system with a board waveband covering visible light. The high-sensitivity light spectrum acquisition and test system with the board waveband covering visible light is characterized in that: the test system is composed of a light source, an acquisition light path, a photoelectric device, a signal acquisition circuit, an ARM (Advanced RISC Machine) processing circuit and a touch display screen, wherein the light source transmits a simulated full solar spectrum into the acquisition light path by a quartz optical fiber, and the light spectrum becomes parallel light through a collimating lens, then the parallel light is irradiated to a focusing lens through a holographic grating, converged and transmitted onto a detector; a current signal of the light spectrum is converted into a voltage signal by a read-out circuit, and the voltage signal is input to the signal acquisition circuit; the signal acquisition circuit inputs a signal of the read-out circuit to the processing circuit; the signal of the read-out circuit is digitally filtered, displayed and stored by an embedded ARM signal processing software; and the touch display screen performs light spectrum acquisition and test. Compared with the prior art, the high-sensitivity light spectrum acquisition and test system with the board waveband covering visible light provided by the invention has the advantages of integrated functions of acquisition, displaying and storage, high sensitivity in weak light detection, high signal-to-noise ratio, fastness and convenience, and suitability for portable and mobile applications.

Description

technical field [0001] The invention relates to the technical field of microelectronics and circuit design, in particular to a wide-band high-sensitivity spectrum acquisition and testing system covering visible light. Background technique [0002] With breakthroughs in aerospace, remote sensing and telemetry, biomedicine, food hygiene, airborne detection, tracking, low-light night vision reconnaissance and tracking, and photoelectric weapon guidance systems, higher resolutions have been proposed for spectral analysis and spectral detection. , higher sensitivity and other requirements. In spectroscopic tests, photodetectors that detect light play a decisive role in analyzing structures. High-sensitivity photodetectors are more and more widely used in modern spectral acquisition systems because they can detect all spectral lines within a certain wavelength range. The main task of the spectrum acquisition system is to convert the output light signal from the dispersion system...

AI Technical Summary

Problems solved by technology

[0003] At present, the spectrometers used in China all use CCD array detectors. The response spectrum of CCD array detectors is slow, the integration time is long, and the resolution and sensitivity are relatively low. Qualitative and quantitative analysis, but poor portability, especially in the field conditions is not easy to detect

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