Dual-fiber laser radar system for realizing dual field-of-view low-blind-area detection
A laser radar and dual-fiber technology, applied in the field of dual-fiber laser radar systems, can solve problems such as inconsistent splicing signals, avoid the effects of poor stability and jump changes, and improve the stability of the mechanism
Active Publication Date: 2019-01-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology
For the large-aperture lidar system, the blind area has not been well controlled due to the existence of the secondary mirror. Although it has been proposed to add a paraxial receiving optical system to the main receiving optical system to reduce the blind area, this method is The disadvantage is that the received signal needs to be spliced, which will affect the inconsistency of the spliced signal
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[0015] Such as figure 1 As shown, a dual-fiber laser radar system for dual-field-of-view and low-blind zone detection includes a transmitting optical system and a receiving optical system. The transmitting optical system transmits optical signals into the atmosphere, and the backscattered The signal is received by the receiving optical system. The main axis fiber 1 and the paraxial fiber 2 are placed at the focal plane of the receiving optical system. The scattered signal received by the receiving optical system passes through the main axis fiber 1 and the paraxial fiber 2. send it out.
[0016] Described emission optical system comprises Nd:YAG laser 3, beam expander 4, reflective prism 1 5 and reflective prism 2 8, and the laser light that described Nd:YAG laser 3 emits, successively passes through beam expander 4, reflective Prism one 5 and reflection prism two 8 shoot into the atmosphere afterward.
[0017] The receiving optical system includes a Newtonian telescope 6 an...
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The invention discloses a dual-fiber laser radar system for realizing dual field-of-view low-blind-area detection. The dual-fiber laser radar system comprises a transmitting optical system and a receiving optical system, wherein the transmitting optical system emits an optical signal into the atmosphere, a back scattering signal generated after passing through the atmosphere is received by means of the receiving optical system, a principle axis optical fiber and a paraxial optical fiber are placed at a focal plane of the receiving optical system, and a scattered signal received by means of thereceiving optical system is transmitted out by means of the principle axis optical fiber and the paraxial optical fiber. According to the dual-fiber laser radar system, the paraxial optical fiber isadditionally arranged on the basis of the principle axis optical fiber, so as to realize the purpose of suppressing the detection blind area by means of laser radar. Compared with the existing detection technology,, significantly improves the mechanism stability when the dual-fiber laser radar system is implemented, and two echo signals are coupled by adopting a dual-fiber detection technology, thereby avoiding poor stability caused by signal splicing and the influence of jumping.
Description
technical field [0001] The invention relates to the technical field of laser radar, in particular to a dual-fiber laser radar system for realizing dual-field of view and low-blind zone detection. Background technique [0002] The lidar detection technology has the advantages of high time and space-time resolution. Since the development direction of the tropospheric lidar in recent years is mainly how to solve the impact of the blind area on the detection results, it is required that the lidar detection blind area should be as small as possible, so that it can be more accurate. Accurately analyze the vertical distribution near the ground. [0003] At present, lidar detection technology mostly adopts coaxial emission optical system to achieve the purpose of low blind spot lidar detection. The coaxial transmitting optical system also includes the coaxial concentric transceiver optical system and the coaxial non-concentric transceiver optical system, and the coaxial concentric ...
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IPC IPC(8): G01S7/481
CPCG01S7/4818Y02A90/10
Inventor 刘洋张天舒赵雪松付毅宾陈臻毅范广强董云生于康龙
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI