Three-view-field infrared optical system and optical device

Abstract

The invention relates to a three-view-field infrared optical system and an optical device, and belongs to the technical field of optical devices. The three-view-field infrared optical system comprises a first objective lens, a zoom lens set, a focusing lens set, a fixed refraction and reflection mirror set and a convergent mirror set which are sequentially arranged along the light path. The fixed refraction and reflection mirror set comprises a first plane reflection mirror, a second plane reflection mirror and a third plane reflection mirror. A compensation mirror set is arranged between the first plane reflection mirror and the second plane reflection mirror. The zoom lens set and the compensation mirror set can be moved into the light path to form a middle view field light path or moved out of the light path to form a small view field light path. The optical system further comprises a second subjective lens, a fixed lens set and a switching reflection mirror which are sequentially arranged along the light path. The large view field light path is composed of the second subjective lens, the fixed lens set, the switching reflection mirror and the convergent mirror set together. The switching reflection mirror can conduct switching on the large view field light path, a middle large view field light path or the small view field light path. By means of the three-view-field infrared optical system, compactness of the structure is achieved, and the cold reflection phenomenon of the large view field can be eliminated.

Description

technical field [0001] The invention relates to a three-field infrared optical system and an optical device, belonging to the technical field of optical equipment. Background technique [0002] The long-range photoelectric detection system needs to have a very long working distance and high-resolution imaging performance, and must be able to meet the requirements of high integration and small volume. At present, infrared imaging systems are more and more widely used in navigation, observation, tracking and other fields, but single-field infrared optical systems cannot meet the development needs of modern infrared optical systems due to their single function, and three-field infrared optical systems have different sizes. Three fields of view, the large field of view can be used to search for targets in a wide range, the medium field of view can be further observed and identified, and the small field of view can be used for precise tracking and aiming, which has been widely us...

AI Technical Summary

Problems solved by technology

However, in this optical system, the movement of the optical components is relatively long, which will also lead to an increase in the volume and weight of the whole machine

[0005] The cut-in non-continuous zoom system is divided into multiple groups and cuts in or out of the optical components multiple times in different orders to obtain different focal length changes, and it is also easy to cause the volume of the optical system to increase

[0006] All the above-mentioned optical systems share part of the optical path, which will lead to serious cold reflection of the large field of view optical path, which will affect the detection and identification of targets

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