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Light-splitting and spectrum-selecting device used for high spectral laser radar

A laser radar and hyperspectral technology, applied in the field of hyperspectral imaging and target detection, laser radar, can solve the problem of low spectral resolution, achieve the effect of improving resolution, improving performance, and fast flipping speed

Inactive Publication Date: 2016-11-16
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0011] The object of the present invention is to provide a spectroscopic spectrum selection device for hyperspectral lidar to solve the problem of low spectral resolution of existing hyperspectral lidar

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  • Light-splitting and spectrum-selecting device used for high spectral laser radar
  • Light-splitting and spectrum-selecting device used for high spectral laser radar
  • Light-splitting and spectrum-selecting device used for high spectral laser radar

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Embodiment Construction

[0026] The invention provides a spectroscopic and spectral selection device for hyperspectral lidar, including a blazed grating, a micromirror array and an APD line array, the blazed grating splits the target echo to obtain spatially continuous monochromatic light, and the micromirror array The micro-mirrors in the system reflect the monochromatic light of different central spectrums to the APD linear array for detection by flipping. Among them, in the case of flipping a single row of micro-mirrors, the smallest resolution spectrum can be obtained. By controlling multiple rows of micro-mirrors The combination of mirrors can be flipped to obtain the combined spectrum. The invention effectively improves the spectral resolution of the hyperspectral laser radar.

[0027] figure 1 It is a schematic diagram of a spectroscopic and spectral selection device for hyperspectral laser radar provided by the present invention. The hyperspectral laser radar generates target echoes after pro...

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Abstract

The invention provides a light-splitting and spectrum-selecting device used for a high spectral laser radar, including a blazed grating, a micromirror array and an APD linear array. The blazed grating performs light splitting of a target echo to obtain spatially-continuous monochromatic light, and projects the spatially-continuous monochromatic light to the micromirror array. Micro reflecting mirrors in the mircromirror array are overturned for reflecting monochromatic light of different center frequency spectrums to the APD linear array for detection, wherein in the condition of overturning a single row of micro reflecting mirrors, the minimal resolution ratio spectrum is obtained, and by controlling combined overturning of multiple rows of micro reflecting mirrors, a combined spectrum can be obtained. The invention effectively improves the spectrum resolution of the high spectral laser radar.

Description

technical field [0001] The invention belongs to the fields of laser radar, hyperspectral imaging and target detection, and in particular relates to a spectroscopic spectrum selection device for hyperspectral laser radar. Background technique [0002] Hyperspectral lidar combines the advantages of lidar and hyperspectral. It can acquire rich spectral features of the target while acquiring the three-dimensional features of the target. It has broad application prospects in agriculture, forest remote sensing, target detection and other fields. Hyperspectral lidar uses supercontinuum laser as the light source, and emits white light laser to the target through the scanning mechanism. The target echo is split by the grating, and the echo composite light is decomposed into spatial monochromatic light. Through the array detection scheme, multiple targets can be obtained. At the same time, the hyperspectral lidar achieves the three-dimensional information acquisition of the target by ...

Claims

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Application Information

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IPC IPC(8): G01S17/89G01S7/481
CPCG01S7/4817G01S17/89
Inventor 李锋孟柘姜成昊朱精果李孟麟解天鹏
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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