Infrared zoom optical system with ultrahigh zoom ratio

Abstract

The invention relates to an infrared zoom optical system with an ultrahigh zoom ratio, which adopts a combination of a Gregory type telescopic hollow reflection objective lens, a Gregory type telescopic reflection eyepiece and a continuous zoom lens group, when the Gregory type telescopic reflection eyepiece is added and removed, the switching between an ultra-small field-of-view optical path anda continuous zooming field-of-view optical path of the optical system is realized, and an ultra-high zoom ratio is realized. Based on the combination of the optical catadioptric principle and the zoomprinciple, the switching between the ultra-small field of view and the continuous zoom field of view of the optical system is realized through the switching of the eyepiece of the reflective telescopic optical system, and the high-quality imaging can be maintained. The ultra-long focal length continuous zooming problem is solved, the ultra-high zoom ratio is achieved, the space volume of the system is saved, and the manufacturing cost of the optical system is reduced.

Description

technical field [0001] The invention belongs to the optical technology and relates to an infrared zoom optical system with super high zoom ratio. Background technique [0002] In order to obtain images of different sizes on the image plane of a fixed-focus infrared camera, the distance between the target object and the lens must be changed or a lens with a different focal length must be replaced. The zoom thermal imager can change the focal length of the optical system. Therefore, target images of different sizes can be obtained on the image plane, which is very beneficial for photoelectric observation and monitoring. [0003] According to the distance of the target to be observed, the photoelectric observation and monitoring system usually requires the optical system to have the ability of continuous zooming, which is used for the detection, identification and large-scale monitoring of targets at different distances. [0004] The optical system of the current infrared zoom...

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes an ultra-high zoom ratio infrared zoom optical system, by combining the reflective telescopic optical system and Combining the refraction zoom optical system, through the switching of the eyepiece of the reflective telescopic optical system, the mutual switching between the ultra-small field of view and the continuous zoom field of view is realized, which solves the problem of ultra-long focal length continuous zoom and realizes ultra-high zoom Ratio, saving the system space volume, and reducing the manufacturing cost of the optical system

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