Environment defocusing self-adaptation compensation method for airborne laser communication system

Abstract

The invention relates to an environment defocusing self-adaptation compensation method for an airborne laser communication system, and belongs to the field of space laser communication. An optical antenna is used for shrinking a laser bundle of the airborne laser communication system; after passing through a liquid lens, the laser bundle is focused on an image detector through a defocusing detection optical module, and the image detector interprets the diameter of laser spots and transmits the diameter information of the laser spots to a system controller; the system controller obtains the environment defocusing amount of the laser communication optical system through calculation, then obtains the needed compensation amount of the liquid lens, converts the compensation amount of the liquid lens into an electric control signal and transmits the electric control signal to the liquid lens, and the liquid lens receives the electric control signal, changes the curvature radius and then changes the focal length to perform defocusing self-adaptation compensation. Compared with the prior art, the system controller is used for controlling the liquid lens to perform dynamic environment defocusing compensation without moving any optical components, response speed is high, and the structure is easy to lighten and miniaturize.

Description

technical field [0001] The invention belongs to the field of space laser communication, in particular to an adaptive compensation method for environment defocus of an airborne laser communication system. Background technique [0002] For the laser communication terminal on the airborne platform, the expansion and contraction of materials caused by temperature, the change of air density caused by air pressure, and the aero-optical effect caused by high-speed flight will all cause the optical system in the communication terminal to defocus. It is mentioned in the literature "Aerodynamic Optics Effect and Compensation in Airborne Laser Communication" and "The aero optics effect on near space laser communication optical system" that the defocus caused by temperature or boundary layer can be adjusted by using fixed optical mirror group compensate. However, this method only compensates for a certain level of defocus, and cannot comprehensively perform real-time dynamic compensati...

AI Technical Summary

Problems solved by technology

However, this method only compensates for a certain level of defocus, and cannot comprehensively perform real-time dynamic compensation for defocus caused by other environments such as air pressure and aero-optical effects.

The application number is 201210445099.7, and the patent titled "the device for compensating the optical focal plane based on the wedge prism" uses the movement of the prism and the lens group as the actuator to compensate the defocus, but the actuator of this method is large in size and complex in structure. and slow response

At present, there is still a common method, which is to control the relative position between the moving detector and the optical system for defocus compensation, but this method has a complex structure and is difficult to control the accuracy

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