A zoom lens
CN120847992BActive Publication Date: 2026-06-26DONGGUAN YUTONG OPTICAL TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGGUAN YUTONG OPTICAL TECH
- Filing Date
- 2025-08-18
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
[0003]目前，1/1.2”的芯片逐渐被广泛使用，但传统变焦镜头通常使用1/2.7”的芯片，使用1/1.2”的芯片的传统变焦镜头存在光圈小，红外不共焦等问题
Benefits of technology
[0039]The technical solution of this invention provides a three-element zoom lens composed of 14 lenses. Specifically, it includes a focusing lens group, a zoom lens group, and a fixed lens group arranged sequentially along the optical axis from the object plane to the image plane. By reasonably matching the optical power of each lens group and each lens, aberrations can be better corrected, ensuring image clarity at different focal lengths. At the same time, this zoom lens has the advantage of a large aperture, which can be adapted to large target surface chips (1/1.2”) to meet the needs of security applications.
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Smart Images
Figure CN120847992B_ABST
Abstract
The application discloses a zoom lens, comprising a focusing lens group, a zoom lens group and a fixed lens group arranged in sequence along an optical axis from an object plane to an image plane; the focusing lens group and the zoom lens group are arranged to move along the optical axis direction; the focusing lens group has negative refractive power, the zoom lens group has positive refractive power, and the fixed lens group has negative refractive power; the focusing lens group comprises a first lens, a second lens, a third lens and a fourth lens with refractive power in sequence being negative, negative, negative and positive; the zoom lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens with refractive power in sequence being positive, positive, negative, positive and negative; and the fixed lens group comprises a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens and a fourteenth lens with refractive power in sequence being negative, positive, positive, negative and positive or negative. The application can realize a zoom lens with advantages of large aperture, high image quality and the like, and can be adapted to a large target chip.
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