Long-wave infrared two-speed viewing field tracking measurement lens

Abstract

The invention relates to a long-wave infrared two-speed viewing field tracking measurement lens comprising a main lens cone. The long-wave infrared two-speed viewing field tracking and measuring lens is characterized in that the main lens cone is internally provided with a just crescent fixed lens A, a switching lens group B and a just crescent focusing lens C along an incident direction of infrared light from left to right, wherein the just crescent focusing lens C is driven by a focusing mechanism arranged in the main lens cone; the switching lens group B is divided into a long-focus lens group B (long) used during a long lens focus and a short-focus lens group B (short) used during a short lens focus, and the long-focus lens group B (long) or the short-focus lens group B (short) is driven by a switching rotation mechanism arranged in the main lens cone to be on a same light path with the just crescent fixed lens A and the just crescent focusing lens C. The invention has long designed focus of the lens, can conveniently switch the two-speed viewing field lens and enable a thermal imaging system to carry out tracking measurement on a long-distance target, can not only carry out large-area low-magnification approximate observation on the long-distance target, but also carry out small-area high-magnification detailed observation on the long-distance target.

Description

technical field [0001] The invention relates to a long-wave infrared two-stage field of view tracking measurement lens, which belongs to the field of thermal imaging monitoring. Background technique [0002] Infrared imaging has the advantages of long working distance at night; good anti-interference performance; better environmental adaptability than visible light; strong ability to penetrate smoke, dust and haze; can work all-weather and all-day. After entering the 21st century, infrared imaging technology has been widely used in military, paramilitary and civilian fields. The infrared camera lenses of various specifications matched with it also arise at the historic moment. However, most of the full-transmission infrared camera lenses are short-focus fixed-focus lenses. The focal length of the lens is short, and the operating distance of the system is short. Obviously, it is the research purpose of the present invention to address the above problems. Contents of the ...

AI Technical Summary

Problems solved by technology

But in the full-transmission infrared camera lens, most of them are short-focus fixed-focus lenses, the focal length of the lens is short, and the operating distance of the system is short.

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