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Acousto-optic adjustable filtering type near-infrared spectrometer

An acousto-optic and optical filter technology, applied in the improvement of real-time spectral analysis technology, in the field of acousto-optic tunable filter near-infrared spectrometer, which can solve the problem that the technical state of the spectrometer is immature and cannot well meet the actual detection needs, etc. problem, to achieve the effect of strong multi-sample adaptability, strong environmental adaptability, and large dynamic range

Active Publication Date: 2013-02-13
CHINA ELECTRONICS TECH GRP NO 26 RES INST
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Problems solved by technology

The reason why this product has not been popularized and applied is that the technical state of this type of spectrometer is still immature and cannot meet the actual detection needs well. It is urgent to develop new technologies to effectively solve its problems in wavelength resolution, detection sensitivity and multiple Problems in the adaptability of various samples

Method used

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  • Acousto-optic adjustable filtering type near-infrared spectrometer

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Embodiment Construction

[0015] Such as figure 1 As shown, the present invention includes a light source module 1, a concentrating collimation system I2, an acousto-optic tunable filter (AOTF) 3, a concentrating collimation system II4, a sample cell 5, a concentrating system 6, a photodetector 7, A signal acquisition and processing system 8 , a control pulse generator 9 , and a radio frequency drive source 10 . Among the above, the optical components light source module 1, light focusing and collimating system I2, acousto-optic tunable filter (AOTF) 3, light focusing and collimating system II4, sample cell 5, light focusing system 6 and photodetector 7 in sequence The optical path system is set on the same optical axis. The optical path system completes the program-controlled splitting of the near-infrared light emitted by the light source and then enters the detection sample, and then receives the signal light transmitted or reflected by the sample through the photodetector. The above-mentioned sign...

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Abstract

The invention discloses an acousto-optic adjustable filtering type near-infrared spectrometer comprising a light source module, a light condensation and collimation system I, an acousto-optic adjustable filtering device, a light condensation and collimation system II, a light condensation system, a photoelectric detector and a signal collecting and processing system, wherein the signal collecting and processing system is sequentially connected with a regulating and controlling pulse generator and a radio frequency driving source; the output of the radio frequency driving source is connected with the acousto-optic adjustable filtering device; the signal collecting and processing system generates a numerical control signal to the regulating and controlling pulse generator; the regulating and controlling pulse generator generates a regulating and controlling signal with suitable duty ratio and transmits the regulating and controlling signal with suitable duty ratio to the radio frequency driving source so as to be subjected to radio frequency signal modulation and controlling; and the radio frequency driving source amplifies the modulated and controlled radio frequency signal to a suitable power so as to drive the acousto-optic adjustable filtering device. The acousto-optic adjustable filtering type near-infrared spectrometer has the following beneficial effects: 1, the spectral resolution is high; 2, the detection sensitivity is high; 3, the detection dynamic range is large and the adaptability to various samples is strong; and 4, the signal can be processed and collected in real time and the environmental adaptability is strong.

Description

technical field [0001] The invention relates to the improvement of real-time spectrum analysis technology, specifically refers to an acousto-optic tunable filter type near-infrared spectrometer adopting the duty cycle control technology, which belongs to the field of optoelectronic technology. [0002] Background technique [0003] Near-infrared spectroscopy (NIR) analysis technology is a rapidly developing high-tech analysis and testing technology, which is an organic combination of spectral measurement technology, computer technology, chemometrics technology and basic measurement technology. Compared with traditional analysis techniques, it has the advantages of non-destructive testing, high analysis efficiency, fast analysis speed, low analysis cost, good reproducibility, sample measurement generally does not require pretreatment, convenient spectral measurement, and is suitable for on-site detection (such as mass sampling) and online analysis and other unique advantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
Inventor 吴冉何晓亮刘伟杨嵩吴畏谢强陈华志陈永峰
Owner CHINA ELECTRONICS TECH GRP NO 26 RES INST
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