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Multispectral sensing wavelength conversion system based on optical fiber array

An optical fiber array and wavelength conversion technology, which is used in radio wave measurement systems, instruments, etc., to achieve wide application and reduce the number of effects.

Inactive Publication Date: 2015-03-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of wavelength conversion in multispectral detection and the problem of making large area array detectors, and propose a multispectral detection wavelength conversion system based on optical fiber array

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Embodiment

[0023] A multi-spectral detection wavelength conversion system based on optical fiber array, such as figure 2 As shown, it includes a receiving optical system 1, a beam splitting grating 2, a spatial light modulator 3, an optical fiber array 4, a microlens array 5, a photodiode APD array 6, a transimpedance amplifier array 7, a differential receiving amplifier array 8, and a vertical cavity surface laser Array 9, computer 10 constitutes.

[0024] The computer is programmed to replace the grayscale image to control the amplitude corresponding to the pixel unit of the spatial light modulator panel. The spatial light modulator is a nematic liquid crystal amplitude spatial light modulator, which realizes 4*4 area control of the optical fiber array. Firstly, the area (I, I) has light signals transmitted, and other areas are opaque; secondly, the area (I, II) has light signals transmitted, and other areas are opaque... Similarly, until the area (IV, IV).

[0025] The optical fib...

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Abstract

The invention relates to a wavelength conversion system used for streak tube laser radar 3D multispectral sensing, in particular to a multispectral sensing wavelength conversion system based on an optical fiber array and belongs to the field of photo-electronic imaging. The multispectral sensing wavelength conversion system based on the optical fiber array comprises a receiving optical system, a spectro-grating, a spatial light modulator, the optical fiber array, a micro-lens array, a APD array, a transimpedance amplifier array, a differential receiving amplifier array, a vertical cavity surface laser array and a computer. The problem of manufacturing of a large-array detector is solved by introducing the spatial light modulator and the optical fiber array, and the crosstalk influence generated when all channels of a photo-electronic detector receive echo pulses is reduced. According to the multispectral sensing wavelength conversion system, the echo signals of different wavelengths are converted into peak-wavelength signals which a streak tube positive electrode material can respond to, multi-wavelength conversion for streak tube laser radar multispectral sensing is achieved, and the multispectral sensing wavelength conversion system can be widely applied to the multispectral 3D sensing imaging technology.

Description

technical field [0001] The invention relates to a wavelength conversion system for 3D multi-spectral detection of a striped tube lidar, in particular to a wavelength conversion system for multi-spectral detection based on an optical fiber array, belonging to the field of photoelectric imaging. Background technique [0002] The active multispectral imaging system based on the striped tube combines three-dimensional imaging with multispectral, and uses the three-dimensional information and multispectral information of the target to detect simultaneously, which can further improve the accuracy of target detection. Since the photocathode of the stripe tube can only respond to a certain range of light wavelengths, it is necessary to design a wavelength conversion device when performing active multispectral detection. Currently, wavelength conversion technologies can be divided into two categories, all-optical wavelength conversion (AOWC) and optoelectronic-optical (O / E / O) wavelen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/48
CPCG01S7/4816
Inventor 韩绍坤康艳艳夏文泽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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