Visible light continuous zooming telescope optical system

Abstract

The invention relates to a visible light continuous zoom telescope optical system. The system comprises a front fixed lens component, a zoom lens component, a compensation lens component and a rear fixed lens component which are sequentially arranged from an object space to an image space along a light propagation direction, and an aperture diaphragm is positioned between the compensation lens component and the rear fixed lens component; the front fixed lens component has positive focal power, the zoom lens component has negative focal power, the compensation lens component has positive focal power, and the rear fixed lens component has positive focal power; the zoom lens component and the compensation lens component synchronously move towards each other or relative to each other along the optical axis so as to realize the change from short focus to long focus or from long focus to short focus of the telescope optical system; the F number of the telescope optical system is a fixed value. The telescope optical system has a large focal length change range, and the system has a fixed F number in the change process from short focus to long focus or from long focus to short focus, so that the resolution ratio of the system under each focal length is consistent, and the imaging performance of the system is kept stable.

Description

technical field [0001] The invention relates to the technical field of optical system and device design, in particular to a visible light continuous zoom telescopic optical system. Background technique [0002] Although the existing conventional fixed-focus photoelectric system with fixed focal length has a certain depth of field and can image targets at different positions within a certain distance range, it is difficult to realize large-scale target search and small-area target positioning at the same time. This is due to its fixed focal length and field of view. In order to realize target detection at different distances and different positions, zoom-type photoelectric systems have been gradually developed, and are widely used in target detection on land, sea, and air. The zoom optical system is to change the overall focal length of the system by changing the distance between different lens components, so as to achieve target observation at different distances and differ...

AI Technical Summary

Problems solved by technology

This method reduces the resolution consistency of the system at different focal lengths, resulting in deviations in imaging performance when the system changes from the short-focus end to the long-focus end.

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