A short-wave infrared optical athermalization continuous zoom lens

Abstract

The invention relates to a short-wave infrared optical athermalized continuous zoom lens. An optical system of the lens comprises a front fixed group A with positive focal power, a variable magnification group B with negative optical power, a compensation group C with positive focal power, a diaphragm D, and a rear fixed group E with positive focal power; wherein the front fixed group A includes afirst gluing group where a positive meniscus lens A-1, a negative meniscus lens A-2 and a positive meniscus lens A-3 are closely connected; the variable magnification group B includes a second gluinggroup where a biconcave lens B-1, a positive meniscus lens B-2 and a biconcave lens B-3 are closely connected; the compensation group C includes a third gluing group in which a biconvex lens C-1, a negative meniscus lens C-2 and a positive meniscus lens C-3 are closely connected; the rear fixed group E includes a positive meniscus lens E-1, a negative meniscus lens E-2, and a biconvex lens E-3. The lens disclosed in the invention can achieve fastest zooming; small lead and small total optical length can be realized; the system is small in size and wide in operating temperature range, and repeated focusing is not needed.

Description

technical field [0001] The invention relates to a short-wave infrared optical athermalization continuous zoom mirror. Background technique [0002] Compared with visible light, short-wave infrared has better fog penetration ability, which can greatly improve the visibility in the environment of fire and smoke; it is sensitive to high-temperature objects, and can determine the ignition point more accurately than long-wave infrared; short-wave infrared is sensitive to moisture, and can be used for rainstorm warning, detection, tornado observation, etc. In bad weather and low visibility conditions, its imaging is similar to visible light images, and it has better detail resolution and resolution capabilities than thermal imaging. The reflection spectrum of green plants in the near-infrared band is very different from that of camouflage paint. Conventional camouflage has no meaning for near-infrared imaging systems, and it can be used as a new security defense method to detect ...

AI Technical Summary

Problems solved by technology

However, at present, the development and application time of short-wave infrared lenses is relatively short, and there are generally shortcomings of low resolution. Most of them can only meet the needs of short-wave infrared detectors with a pixel size of 15um, and they are basically fixed-focus lenses, which are difficult to meet the panorama at the same time. Search and small-area magnification observation needs, so it is necessary to develop a short-wave infrared lens with continuous zoom

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