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Adaptive variable-speed scanning laser imager

A technology of variable-speed scanning and laser imaging, which is applied in the directions of measuring devices, re-radiation of electromagnetic waves, and utilization of re-radiation, and can solve problems such as non-uniformity

Inactive Publication Date: 2003-06-18
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the purpose of the invention is to provide a device for adaptive variable-speed scanning laser imaging, so as to realize non-uniform ground sampling, to make up for the defects of constant-speed sampling in current scanning laser imaging, and to achieve the purpose of obtaining the best laser imaging effect of ground targets

Method used

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  • Adaptive variable-speed scanning laser imager

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Embodiment Construction

[0019] The following is based on Figure 2 ~ Figure 6 A preferred embodiment of the present invention is given. see figure 2 As shown, the optical machine head 3 in the present invention is placed figure 1 Among the shown systems, together with other components, a scanning laser imaging information acquisition system is formed, which is installed on the installation base 4 of the flight platform.

[0020] Such as figure 2 As shown, the optical machine head 3 receives the laser beam emitted by the laser 2 and divides it into a sampling laser beam and a detection laser beam by a beam splitter 32 thereof. Wherein, the sampling laser beam outputs a laser sampling pulse signal to an input end of the distance measurement and fluctuation situation prediction circuit 38 through the output end 331 of the laser emission sampler 33; Straight mirror 34, cube prism 35, scanning mirror 36 of scanning ground target 14, primary mirror 371 of telescope 37, secondary mirror 372 of telesco...

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Abstract

A laser imaging apparatus with self-adaptable speed change scanning is used to obtain 3-D image of a target and belongs to the technical field of observation and imaging to ground. The apparatus is mainly used in 3-D imaging of the ground target on the basis of the observation to ground with laser scanning, and also used in 3-D laser imaging of close target and tomographic scan. A close loop mainly achieves the speed change scanning of a scanning lens driven by a scanning motor, and the basis for the scanning is the condition of fluctuation of the ground target. Electrical signal, mechanical rotation, laser detection and the like links to achieve the close loop. The close loop consists of four components, they are the components of optical members and of laser detection.

Description

Technical field: [0001] The invention relates to a device for acquiring a three-dimensional image of a target, belonging to the technical field of earth observation and imaging. It is mainly used in 3D imaging of ground targets based on scanning lasers, and can also be applied to 3D laser imaging and tomographic scanning of close-range targets. Background technique: [0002] The three-dimensional imaging technology for earth observation usually adopts microwave synthetic aperture radar (SAR) imaging, optical imaging, laser imaging, stereo photography, imaging spectrum, etc. as the main means, and is equipped with GPS positioning system and attitude measurement device to determine the position and attitude of the flying platform . [0003] Direct laser imaging technology using high-brightness, high-direction and coherent lasers for earth detection can constitute a three-dimensional system for direct laser imaging for earth observation. Using laser as active irradiation not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
Inventor 胡以华舒嵘方抗美赵淑华王建宇薛永祺
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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