System for testing influences of microvibration on imaging quality of long-focus camera

Abstract

The invention provides a system for accurately measuring and evaluating influences of microvibration on the imaging quality of a camera and belongs to the field of optical imaging. A dynamic signal acquisition instrument is connected with ten three-way acceleration sensors; a graphic workstation is connected with a camera imaging electronic part; a counteractive flywheel controller is connected with a Z-direction counteractive flywheel, an X-direction counteractive flywheel and a Y-direction counteractive flywheel through cables; the Z-direction counteractive flywheel, the X-direction counteractive flywheel and the Y-direction counteractive flywheel are installed on a camera main force bearing plate, the long-focus camera is installed on a camera support, the camera support and a long-focus collimator are horizontally disposed on a vibration isolation air floating platform, the optical axis of the long-focus camera coincides with the optical axis of the long-focus collimator by adjusting side swaying and pitching of the camera support, and a knife edge target is placed at the focus of the long-focus collimator; the ten three-way acceleration sensors adhere to the X-direction counteractive flywheel, the Z-direction counteractive flywheel, the Y-direction counteractive flywheel, the camera main force bearing plate, a camera truss, a camera secondary mirror mounting rack, the camera support, the long-focus collimator, the knife edge target and the large vibration isolation air floating platform.

Description

technical field [0001] The invention relates to a test system capable of testing and evaluating the influence of micro-vibration on the imaging quality of a long-focus camera, and belongs to the field of optical imaging. Background technique [0002] Long focal length cameras are widely used in ground-based, space-based and space-based platforms due to their high angular resolution and the ability to obtain clear images of distant targets. However, due to the small instantaneous field of view of the long focal length camera, it is sensitive to external environmental interference, especially the moving parts and flexible parts on the installation platform will produce some tiny vibrations with small amplitude and high frequency when they are working. The optical components of the camera and the structure of the camera cause the optical axis of the camera with a long focal length to shake during the exposure or integration time, causing blurring of the optical image and reduci...

AI Technical Summary

Problems solved by technology

However, due to the small instantaneous field of view of the long focal length camera, it is sensitive to external environmental interference, especially the moving parts and flexible parts on the installation platform will produce some tiny vibrations with small amplitude and high frequency when they are working. The camera optical components and camera structure cause the shake of the optical axis of the camera with a long focal length during the exposure or integration time, causing blurring of the optical image and reducing the imaging quality of the camera

At present, for the impact of micro-vibration on the imaging quality of long-focus cameras, research at home and abroad mainly focuses on system integration simulation, micro-vibration testing and isolation, image restoration, etc., but there is no system-level full-link micro-vibration testing and evaluation work

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