Laser radar visibility meter and transceiving coaxial optical system thereof

Abstract

The invention relates to a laser radar visibility meter and a transceiving coaxial optical system of the laser radar visibility meter. A lens and a reflector are sequentially arranged on a subsequent light path of an outgoing beam of a laser, the center of the reflector is provided with a small hole, the outgoing beam of the laser is focused by the lens, passes through the small hole in the center of the reflector, then is coupled in a transceiving optical fiber and is guided into a telescope system for emission, an atmosphere return signal enters the transceiving optical fiber again through the telescope system, the beam is coupled by a lens group and a light filter into the transceiving optical fiber after being reflected by the reflector, the transceiving optical fiber is connected with a detector, so that the signal acquisition is fulfilled. The transceiving coaxial optical system provided by the invention can effectively avoid the problem that a non-coaxial laser radar visibility meter is level with a transceiving light path, and is not affected by any geometrical overlap factors; in addition, the transceiving coaxial structure enables the volume of the laser radar visibility meter to be small, the weight to be light and the structure to be more compact.

Description

technical field [0001] The invention relates to the technical field of laser equipment, in particular to the transceiver optical system of a laser visibility meter. Background technique [0002] The lidar visibility meter has the advantages of small size and high measurement accuracy, and can realize multi-angle, all-weather detection, and obtain horizontal and oblique visibility information, which is of great significance for improving aviation safety. [0003] At present, the laser radar visibility meter commonly used at home and abroad adopts the non-coaxial design of the transmitting beam and the receiving beam. The transmitting laser beam of this structure will not pose a threat to the signal detector, but there is a problem of balancing the optical axis of the transmitting beam and the receiving beam. The problem is that under the influence of ambient temperature, the parallelism of the two axes may change, resulting in distortion of the measured data. In addition, no...

AI Technical Summary

Problems solved by technology

[0003] At present, the laser radar visibility meter commonly used at home and abroad adopts the non-coaxial design of the transmitting beam and the receiving beam. The transmitting laser beam of this structure will not pose a threat to the signal detector, but there is a problem of balancing the optical axis of the transmitting beam and the receiving beam. Problem, under the influence of ambient temperature, the parallelism of the two axes may change, resulting in distortion of the measured data

In addition, there is a detection blind area in the non-coaxial structure, and the influence of the geometric overlap factor needs to be considered in the measurement

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