Liquid crystal modulation optical phase control array type spectrometer and detection method

An optical phased array and liquid crystal modulation technology, which is applied in the field of spectrometers, can solve the problems of poor anti-vibration ability of the instrument, unfixed moving parts, and high technical difficulty, and achieve high signal-to-noise ratio, strong anti-vibration ability, and firm structure. Effect

Inactive Publication Date: 2017-08-22
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

However, due to the need for precise moving parts to control the grating, the scanning grating spectrometer requires components such as precision motors, encoders, and motion feedback systems, which make the scanning grating spectrometer technically difficult and expensive; in addition, because the moving parts are not fixed, the instrument is anti-vibration poor ability

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  • Liquid crystal modulation optical phase control array type spectrometer and detection method

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[0028] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0029] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations the...

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Abstract

The invention relates to a liquid crystal modulation optical phase control array type spectrometer and a detection method. The spectrometer comprises a light dividing system, an optical detector and a data processing system. The light dividing system comprises a liquid crystal modulation optical phase control array unit and used for decomposing light beams given out by a to-be-detected point according to different wavelengths. The optical detector detects the decomposed light beams and coverts optical signals into electrical signals. The data processing system is connected with the optical detector and used for obtaining spectrum curves of the to-be-detected point. According to the invention, high-resolution spectrum information of an object point can be acquired without pushing and scanning of movement parts, so compared with the prior art, effects on restoration of spectrum precision imposed by vibration caused by movement can be eliminated.

Description

technical field [0001] The invention belongs to the field of spectrometers, in particular to a liquid crystal modulation optical phased array spectrometer and a detection method. Background technique [0002] The spectrometer is used to obtain the spectral information of the detected object point. Using the spectral "fingerprint" effect, it can carry out material identification, detection and analysis. It is widely used in many fields such as chemical analysis, agricultural product detection, pollutant analysis, and harmful gas detection. Standard equipment in the laboratory. [0003] According to different spectroscopic methods, currently commercially available spectrometers mainly include dispersion spectroscopic type and interferometric type (Fourier type), among which the interferometric type has a higher signal-to-noise ratio in the mid- and far-infrared spectral bands, and is generally used for long-wavelength spectral detection , This type of instrument generally has...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28
CPCG01J3/2803
Inventor 张冰韩顺利孟鑫刘磊侯喜报
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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