Double-aperture infrared double-view-field switching device

Abstract

The invention discloses a double-aperture infrared double-view-field switching device which comprises a limited rotation angle motor driving device, a transmission rod, a connecting rod, a reflective mirror assembly guide rod, a reflective mirror assembly, a first view field limiting and locking device, a second view field limiting and locking device, a rotating shaft and a main shell. Wherein the limited rotation angle motor driving device can provide an accurate rotation angle range, and the device is matched with a plane double-rocker mechanism, so that accurate and rapid switching of double-aperture infrared double view fields is realized. The limiting and locking device realizes accurate positioning of the view field and locking of the reflective mirror, improves the stability of the optical axis after view field switching, and effectively ensures the imaging quality of the double-view-field lens in complex mechanical environments such as impact vibration and the like. The first limiting and locking device and the second limiting and locking device are simple and compact in structure, and miniaturization and compactness of the double-aperture infrared double-view-field lens are achieved.

Description

technical field [0001] The invention relates to the technical fields of mechanics and optics, in particular to a dual-aperture infrared dual-field switching device. Background technique [0002] In recent years, with the continuous application and development of infrared thermal imaging technology in military, civilian and other fields, single-field infrared lenses gradually cannot meet the actual needs in complex scenes, while infrared dual-field lenses are used in guidance, remote sensing, and reconnaissance. , early warning and other fields are more and more widely used. The large field of view lens group in the infrared dual field of view lens can perform image matching and target search in a large space range, and the small field of view lens group can complete target recognition, tracking or aiming within a specific range, and its switching speed and after switching The stability of the optical path directly affects the imaging performance of the infrared dual-field l...

AI Technical Summary

Problems solved by technology

The linear motor method takes up a lot of space, requires high machining accuracy, complex assembly and adjustment, poor vibration resistance, and low positioning accuracy; the servo motor method needs to increase the reduction box and angle sensor, the overall structural size is large, and due to the The existence of transmission backlash leads to poor positioning accuracy of the mirror, and the stability of the optical axis in this field of view cannot be guaranteed after the field of view is switched, which affects the imaging quality

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