Improved aviation camera focusing system

Abstract

The invention relates to an improved aviation camera focusing system. The system is composed of a lighting source, a collimating lens, a target, an objective lens, a reflector, a charge-coupled device, an image acquisition and processing module and a motion control module, wherein the collimating lens and the target are placed on a light beam line emitted by the lighting source, the connection line of the center of the reflector, the center of the objective lens and the center of the charge-coupled device serves as an optical axis, the optical axis is parallel to the light beam line emitted by the lighting source, the reflector, the objective lens and the charge-coupled device are placed on the optical axis in sequence, and the center of the target coincides with the center of the reflector; the image acquisition and processing module is connected with the charge-coupled device, and the motion control module is connected with the image acquisition and processing module; the target and the image acquisition and processing module are in the same plane, and the mirror plane of the reflector inclines by an angle relative to the perpendicular line of the optical axis. When focusing work is performed, the motion control module drives a focusing component of the objective lens to be used for achieving the focusing work; when imaging work is performed, the image acquisition and processing module acquires images formed on the charge-coupled device.

Description

Technical field [0001] The invention relates to an improved aerial camera focusing system, which is suitable for the field of aerial camera inspection and focusing. Background technique [0002] Image quality is the most important performance index of aerial cameras. While being restricted by the optical system, it is also affected by various environmental factors such as the atmosphere, stray light, temperature, image shift, and CCD devices. Changes in environmental factors such as temperature, atmospheric pressure, and altitude will cause the position of the optical focal plane of the camera to move and cause defocusing. If the defocus amount exceeds the half-focus depth, the photographic resolution will be significantly reduced, and even imaging cannot be performed in severe cases. The current aerial camera focusing can adopt the method of direct image processing on the captured ground image. This method has certain limitations: it has a significant focusing effect on areas w...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that the focusing mirror needs to be swept, the focal plane mirror, the receiving grating, the beam splitting prism, etc., the complexity of the system is increased, and the traditional image processing focusing is ineffective for low-contrast targets, etc., the purpose of the present invention is to An improved focusing system for aerial cameras is provided

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