Device capable of achieving turbulence profile laser radar image surface temperature drift compensation

Abstract

The invention discloses a device capable of achieving turbulence profile laser radar image surface temperature drift compensation. The device comprises a telescope system. The telescope system comprises a front end main lens cone and a rear end support and is characterized in that a temperature drift compensation device is arranged at the rear end of the main lens cone, the temperature drift compensation device is located in front of a focal plane of the telescope imaging system, a receiving detection device is arranged on the support and located on the focal plane of the telescope imaging system, the temperature drift compensation device comprises a lens cone capable of being adjusted in a sliding mode, in the main shaft direction of the telescope system, one end of the lens cone capable of being adjusted in the sliding mode is provided with a positive lens, the other end of the lens cone capable of being adjusted in the sliding mode is provided with a negative lens, and the positive lens and the negative lens are opposite to each other at the interval of 50 mm. After the self compensation device is inserted into an original measuring system, the focal distance and other optical parameters of the original system are not changed, and the inherent spherical aberration of the system can be corrected; meanwhile, self compensation of image surface temperature drift can be achieved by electrically controlling fine adjustment of the temperature drift compensation device.

Description

technical field [0001] The invention belongs to the field of atmospheric turbulent laser radar measurement, and in particular relates to a device for compensating the position change of the turbulent profile laser radar imaging plane caused by temperature changes. Background technique [0002] Atmospheric turbulence profile lidar is a device that uses active detection to measure the structural constants of the atmospheric refractive index at different heights along a vertical path. The device is divided into two units: laser emission and backscattered light signal reception. During measurement, the laser emitting unit shoots the expanded laser beam vertically to the sky. For the paraxial system, the receiving unit is placed next to the emitting unit at a certain angle and distance to receive high-altitude backscattered light signals. Since the high-altitude backscattered light is relatively weak, the receiving unit generally uses a large-aperture Cassegrain telescope for re...

AI Technical Summary

Problems solved by technology

However, the low-light imaging detector ICCD or EMCCD used in the turbulence profile lidar has a large volume and weight. In order to ensure the rigidity of the system, the detector is generally installed in a fixed way, and it is not suitable for frequent movement back and forth, otherwise it will affect the system. measurement has an impact

Images