High-magnifying long-focus zooming camera lens

Abstract

The invention relates to a high-magnifying long-focus zooming camera lens which is characterized in that an optical path structure is respectively provided with a front fixed group with positive focal power, a zooming group with negative focal power, a compensation group with negative focal power and a rear fixed group with negative focal power along the incident light in the direction from the left to the right; the front fixed group is provided with a double-convex lens and a gluing group separated from the double-convex lens in sequence; the zooming group is provided with a negative meniscus lens and a gluing group separated from the negative meniscus lens in sequence; the compensation group is provided with a negative meniscus lens gluing group and a positive meniscus lens gluing group which are mutually glued; and the front part of the rear fixed group is provided with the double-convex lens and a positive meniscus lens separated from the double-convex lens, the middle part thereof is provided with the gluing group and the positive meniscus lens in sequence and the rear part thereof is provided with a meniscus lens and the double-convex lens separated from the meniscus lens. The high-magnifying long-focus zooming camera lens can improve the optical zoom of the zoom lens, and shorten the length of the optical structure so as to being capable of being installed on a general holder, increasing optical rear intercept and improving the resolution of the lens.

Description

technical field [0001] The invention relates to a high-magnification long-focus zoom camera lens, which is suitable for industries in the field of security monitoring. Background technique [0002] Mechanically compensated variable focal length lenses have been used in the field of security monitoring for 30 to 40 years. The traditional optical path structure is composed of four components: the front fixed group, the zoom group, the compensation group and the rear fixed group, but it generally has the disadvantages of low zoom ratio, long structure, short optical back intercept, and low resolution. . Contents of the invention [0003] The object of the present invention is to provide a kind of high magnification long focal length zoom camera lens, its longest focal length is 1000mm, zoom ratio is 25 times, and its total length of optical path is short, can be installed on the general-purpose platform, optical back intercept Long, high resolution. [0004] The technical ...

AI Technical Summary

Problems solved by technology

The traditional optical path structure is composed of four components: the front fixed group, the zoom group, the compensation group and the rear fixed group, but it generally has the disadvantages of low zoom ratio, long structure, short optical back intercept, and low resolution.

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