Adaptive focusing optical system and focusing method

Abstract

An adaptive focusing optical system comprises an optical body mechanism, an electric control box and an adaptive focusing mechanism. The optical body mechanism comprises a lens cone and an optical lens component and is used for acquiring optical image information of a target. The electric control box comprises a detector, an image processor and a controller which are connected in sequence, and is used for realizing focusing control, wherein the detector is installed at the joint of the electric control box and the optical body mechanism, the image processor is used for generating defocus criterion information according to digital image information and sending a corresponding control command to the controller, and the controller is connected with the adaptive focusing mechanism. A linear guide slot is arranged between a lens cone supporting module of the adaptive focusing mechanism and the lens cone of the optical body mechanism, a piezoelectric ceramic driving module is connected to the lens cone through a rigid push rod, and the adaptive focusing mechanism adjusts the position of the lens cone according to a received control signal to realize adaptive focusing.

Description

technical field [0001] The invention relates to the electromechanical field, in particular to an adaptive focusing optical system and a focusing method for microsatellites. Background technique [0002] Modern optical microsatellites have the characteristics of light weight, small size, and low power consumption. They are gradually and widely used in remote sensing, space science experiments, and deep space exploration, and play an important role in the development of the future aerospace field. However, optical satellites may experience defocusing of the on-board optical system due to vibration during launch. The defocusing of the optical system is an important factor affecting the imaging quality. In order to obtain ideal satellite images, the focal plane position of the optical system must be rechecked after the satellite is launched, and the optical system should be adjusted on-orbit if necessary. [0003] A variety of manual focusing optical mechanisms have been propos...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the focusing mechanism in the prior art has low focusing accuracy and cannot meet the task requirements of modern optical micro-satellites with light weight, small volume and low power consumption, and does not have self-adaptive focusing applied to micro-satellites To solve the problem of ability, provide an adaptive focusing mechanism, driven by piezoelectric ceramics, light in weight, small in size, and high in focusing accuracy

[0006] Another purpose of the present invention is to solve the problem that the focusing mechanism in the prior art has low focusing accuracy, cannot meet the task requirements of modern optical micro-satellites with light weight, small volume, and low power consumption, and does not have self-adaptive technology for micro-satellites. To solve the problem of focusing ability, an adaptive focusing optical system is provided, which adopts computer image processing technology and precision mechanical intelligent control technology, which can well realize the adaptive focusing of the spaceborne optical system, and has strong intelligence and excellent focusing ability. High precision, large range, small self-weight and small size of the focusing mechanism, can be applied to micro-satellites, and can prompt micro-satellites to perform adaptive focusing after the optical system is out of focus, and obtain ideal satellite images

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