High-resolution multipoint zoom lens used in intelligent building

Abstract

The invention relates to a high-resolution multipoint zoom lens used in an intelligent building. The high-resolution multipoint zoom lens comprises a main lens barrel and is characterized in that a front lens group A with negative focal power and a rear lens group B with positive focal power are respectively arranged in the incident light direction from left to right, wherein an auto iris is arranged at a diaphragm C between the front lens group A and the rear lens group B; the front lens group A consists of a negative crescent lens A-1, a biconcave lens A-2 and a positive crescent lens A-3; and the rear lens group B consists of a positive crescent lens B-1, a positive crescent lens B-2, a biconvex lens B-3, a biconcave lens B-4, a cementing group formed by tightly connecting a negative crescent lens B-5 with a biconcave lens B-6, and a plano-convex lens B-7. The high-resolution multipoint zoom lens has the advantages of large zoom ratio, integration of an ultra wide angle lens and a standard lens, high resolution, wide spectral confocal range and the like, thus being applicable to camera monitoring of places in the intelligent building, such as an elevator car, a hotel lobby, a corridor, a courtyard border and the like.

Description

technical field [0001] The invention relates to a high-resolution multi-point zoom lens used in an intelligent building, relates to a video camera technology in an intelligent building, in particular to a high-resolution, wide-spectrum confocal, multi-point zoom camera lens device. Background technique [0002] With the development of the intelligent building industry, the status and role of safety precautions in intelligent buildings are increasing day by day. Especially in star hotels, high-end office buildings, banks, and even government office buildings, it plays an important role. Security camera monitoring in the intelligent building industry includes elevator cars, hotel halls, corridors, and courtyard perimeters. Both ultra-wide-angle camera lenses and standard camera lenses are required. However, the existing camera lens series are very It is difficult to find a camera lens that can meet the above requirements one by one. Contents of the invention [0003] The p...

AI Technical Summary

Problems solved by technology

Security camera monitoring in the intelligent building industry includes elevator cars, hotel halls, corridors, and courtyard perimeters. Both ultra-wide-angle camera lenses and standard camera lenses are required. However, the existing camera lens series are very It is difficult to find a camera lens that can meet the above requirements one by one

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