A long focal length lens
The telephoto lens, designed with a 1G6P combination, utilizes an optimized configuration of plastic aspherical and glass spherical lenses to solve the technical challenges of long focal length, small overall length, and low distortion, achieving low-cost, high-resolution imaging.
CN122172405APending Publication Date: 2026-06-09DONGGUAN YUTONG OPTICAL TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGGUAN YUTONG OPTICAL TECH
- Filing Date
- 2024-12-06
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing telephoto lenses struggle to achieve low-cost production and clear imaging while maintaining a long focal length, small overall length, and low distortion.
Method used
The 1G6P combination design includes plastic aspherical lenses with negative and positive optical powers, as well as glass spherical lenses. By optimizing the Abbe number and air gap relationship of the lenses, aberrations are corrected, distortion is reduced, and the overall length of the lens is set reasonably.
Benefits of technology
It achieves low distortion and high resolution imaging at long focal lengths, reduces lens sensitivity and production costs, and is suitable for 1/1.8-inch chips.
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Smart Images
Figure CN122172405A_ABST
Abstract
This invention discloses a telephoto lens, comprising a first lens, a second lens, an aperture stop, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object plane to the image plane. The first lens is a negative power lens, the second lens is a positive power lens, the third lens is a positive power lens, the fourth lens is a positive power lens, the fifth lens is a negative power lens, the sixth lens is a positive power lens, and the seventh lens is a negative power lens. The first, second, fourth, fifth, sixth, and seventh lenses are all plastic aspherical lenses; the third lens is a glass spherical lens. Using a 1G6P combination, it can effectively correct aberrations, reduce distortion, and maintain sufficiently good image quality and improve resolution at long focal lengths.
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