A long focal length, large aperture, high and low temperature confocal gun sighting lens

The long focal length, large aperture, high and low temperature confocal gun sight lens, designed with multiple glass spherical lenses, solves the problems of lens defocusing and unclear imaging in low light under large temperature difference environments, and achieves stable and clear imaging and a wide field of view over a wide temperature range.

CN115453714BActive Publication Date: 2026-05-29JIANGXI PHENIX OPTICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGXI PHENIX OPTICS TECH CO LTD
Filing Date
2022-08-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing camera lenses are prone to defocusing in environments with large temperature differences and have poor image quality in low light, making it difficult to meet the high-precision requirements of firearm aiming, especially in nighttime or low-light environments where the image is unclear.

Method used

Employing a multi-glass spherical lens design, and through the rational allocation of optical power and cemented lens combinations, a long focal length, large aperture, high and low temperature confocal gun sight lens is designed to ensure that the lens remains in focus within a temperature range of -40℃ to +85℃ and produces clear images in low light.

Benefits of technology

It achieves imaging stability and clarity over a wide temperature range, features a compact lens structure, a wide field of view, broad applicability, and high imaging quality, making it suitable for firearm aiming in complex environments.

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Abstract

The application discloses a long-focus, large-aperture, high-low temperature confocal gun sighting lens, which comprises, in sequence along the light incidence direction, a first convex-concave positive lens L1, a second convex-concave positive lens L2, a third convex-concave or biconvex positive lens L3, a fourth convex-concave or biconcave negative lens L4, a fifth biconvex positive lens L5, a sixth biconcave negative lens L6, a seventh biconvex positive lens L7 and an eighth concave-convex negative lens L8, wherein each lens is a glass spherical lens, the third lens L3 and the fourth lens L4 are glued to form a first glued lens group, the fifth lens L5 and the sixth lens L6 are glued to form a second glued lens group, the seventh lens L7 and the eighth lens L8 are glued to form a third glued lens group, and the focal length is reasonably set. The lens can clearly image in weak light, has a long field of view, stable working performance, high imaging quality, compact structure and wide application range.
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