Phase step type scanning imaging method for miniaturization optical imaging guidance system

Abstract

The invention discloses a phase step type scanning imaging method for a miniaturization optical imaging guidance system, which comprises the steps of: receiving a light beam in a search field range by using a front optical system (2), reflecting a light beam in a special field range to an imaging optical system (5) through a periodical motion of a field rapid switching system (3), and finally, imaging on a detector (6). The movement frequency of the field rapid switching system (3) is 1 / n of the frame frequency of the detector (6), an included angle between a reflector (8) and an optical axis changes for 2n times within each movement period, wherein odd numbers of positions correspond to different search fields, even numbers of positions correspond to the same tracking field, and an angle feedback sensing system (4) delays to send a synchronous integrated signal for completing the switching of the search fields and the tracking field. The frame frequency of the search fields is 1 / n of that of the detector (6), and the frame frequency of the tracking field is same as that of the detector (6), thus the invention realizes a large-field rapid search function and a small-field tracking function of the miniaturization optical imaging guidance system.

Description

technical field [0001] The invention belongs to the field of optical guidance, and mainly relates to a step scanning imaging method for a miniaturized optical imaging guidance system. Background technique [0002] Optical imaging guidance has attracted widespread attention from all over the world due to its advantages such as long operating distance, strong anti-interference ability, and high guidance precision. The miniaturization of the optical imaging guidance system is conducive to improving the maneuverability of the guided weapon, increasing the payload of the warhead, and enhancing the lethality of the weapon, so it will become an inevitable trend in the development of optical guidance in the future. Due to the miniaturized aerodynamic shape, it is impossible to increase the volume of the optical system to obtain high-performance image quality, which limits the overall performance index of the optical system. At the same time, due to the complexity of the attack targ...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it does not have image stabilization function and cannot perform fast target search

The disadvantage is that due to the addition of compensation prisms in the optical system, the motion control system is complicated and it is difficult to meet the miniaturization requirements

Based on the above, it can be seen that the existing technology fails to solve the problem of fast search for large fields of view in miniaturized optical imaging guidance systems

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