变焦透镜以及摄像装置
By optimizing the movement and refractive power configuration of the lens group, a zoom lens structure was designed, which solved the miniaturization problem of telephoto zoom lenses for mirrorless digital cameras. It achieved the effect of short back focal length and short overall optical length at the wide-angle end, making it a compact zoom lens suitable for mirrorless digital cameras.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SONY GROUP CORP
- Filing Date
- 2021-03-18
- Publication Date
- 2026-07-17
AI Technical Summary
Miniaturization of telephoto zoom lenses in existing mirrorless digital cameras is difficult, especially in terms of shortening the overall optical length and back focal length. Furthermore, the refractive power configuration of the lens group in existing technologies has not been fully optimized, making it difficult to shorten the overall optical length at the wide-angle end while maintaining high optical performance.
Design a zoom lens structure that includes a first lens group, a second lens group, a third lens group, and a fourth lens group in sequence from the object side to the image plane side, and satisfies a specific condition. By adjusting the amount of movement of the lens groups and the refractive power configuration, the effect of a short back focal length and a short overall optical length at the wide-angle end can be achieved.
It achieves a compact zoom lens that can be mounted on a mirrorless digital camera, maintaining high optical performance throughout the zoom range, easily correcting various aberrations, shortening the overall optical length at the wide-angle end, and featuring a compact design suitable for lens replacement.
Smart Images
Figure CN115335745B_ABST