Scanning three-dimensional imaging laser radar based on linear array APD detector and method
A technology of three-dimensional imaging and laser scanning, which is applied in the direction of radio wave measurement systems, instruments, and measurement devices, can solve the problems of low imaging efficiency of lidar, and achieve the effects of improved detection efficiency, compact system, and component saving
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[0014] The linear array APD detector 1 adopts the 25-element linear array APD detector C30985E of Perkin Elmer Company. The receiving telescope 5 adopts an off-axis double mirror structure, and the volume is compressed. The receiving telescope 5 has an effective aperture of 30mm and a focal length of 150mm. The receiving field of view of the linear array APD detector 1 coincides with the far-field spot of the bar laser, the receiving field of view of a single pixel is 2×2mrad, and the total receiving field of view is 2×48mrad. The center of the laser spot coincides with each other. Under the control of the signal processing circuit 2, the fiber laser 3 emits a circular Gaussian pulsed laser beam with a divergence angle of 1 mrad, a pulse width of 7 ns, and a repetition frequency of 60 kHz. The laser beam is shaped into a bar-shaped laser beam by the laser shaping unit 4 , and the divergence angle becomes 1mrad×80mrad, and is irradiated to the detection area through the two-d...
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