Fine particle laser radar system with adjustable focal position and self-calibration method

Abstract

The invention provides a fine particle laser radar system with an adjustable focal position and a self-calibration method. The fine particle laser radar system comprises a laser, an imaging CCD (charge coupled device), a control computer, a beam expander (8), a first right-angle reflecting prism (9), a corner reflector (10), a plane mirror (11), a collimating mirror (12) and a second right-angle reflecting prism (13), wherein laser emitted by the laser passes the a beam expander (8), the first right-angle reflecting prism (9), the plane mirror (11), the corner reflector (10), a receiving optical system, the collimating mirror (12) and the second right-angle reflecting prism (13) in sequence and then reaches the imaging CCD; the imaging CCD is connected with the control computer; the control computer controls the laser. The fine particle laser radar system realizes the adjustment of a focal plane and a focal position by adjusting a main primary mirror position, and also realizes a whole set of adjustment process, from rough adjustment to fine adjustment, of the fine particle laser radar system. The self-calibration method replaces manual calibration, overcomes the problem that no target image serves as a reference point, improves the precision, and meanwhile eliminates personal errors caused by manual operation.

Description

technical field [0001] The invention relates to an adjustable focus position and high-precision calibration method in a fine-particle laser radar system, belonging to the field of laser radar. Background technique [0002] Fine particle lidar can monitor parameters such as atmospheric aerosol backscattering coefficient, atmospheric extinction coefficient, atmospheric particle mass concentration, and atmospheric boundary layer height in real time. Atmospheric climatology and atmospheric environmental science research is playing an increasingly important role. [0003] In order to reduce the influence of the blind area on the radar measurement distance, most of them now use coaxial transmitting and receiving devices and concentric transmitting and receiving devices. The telescopic system is an important part of the receiving device, and the index of the receiving optical system is mainly formulated based on the index of the telescopic system. The receiving optical system of ...

AI Technical Summary

Problems solved by technology

At present, artificial calibration methods and CCD images are mostly used for calibration. There are many human errors and uncontrollable error factors in two-dimensional calibration itself, so there are disadvantages such as low adjustment accuracy and poor automation.

Although the CCD calibration method currently used replaces manual calibration and reduces human error, the calibration accuracy due to the lack of calibration points is not very high.

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