变焦镜头
By optimizing the refractive power and spacing of the lens groups through a five-group, six-element lens structure, the problems of existing zoom lenses having an Fno > 2.0 and a long TTL at the wide-angle end are solved, resulting in a miniaturized zoom lens with an Fno < 2.0 and a zoom ratio > 1.80, suitable for smartphones and digital cameras with high-pixel image sensors.
CN113109934BActive Publication Date: 2026-07-17CHANGZHOU RAYTECH OPTRONICS CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGZHOU RAYTECH OPTRONICS CO LTD
- Filing Date
- 2021-04-02
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing zoom lenses have an Fno greater than 2.0 at the wide-angle end and a relatively long TTL, resulting in insufficient optical characteristics and making miniaturization difficult.
Method used
It adopts a five-group, six-element lens structure. By adjusting the relationship between the refractive power and Abbe number of the lenses, the spacing between the lens groups is optimized to satisfy a specific relationship, so as to achieve Fno < 2.0, zoom ratio > 1.80, and TTL < 9.00mm when retracted.
Benefits of technology
It achieves a bright lens with good optical characteristics at the wide-angle end (Fno < 2.0), while miniaturizing the overall length of the lens when retracted, making it suitable for smartphones and digital cameras with high-pixel image sensors.
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Smart Images
Figure CN113109934B_ABST
Abstract
本发明涉及光学镜头领域，公开了一种变焦镜头，该变焦镜头自物侧依序由具有负屈折力的第一透镜、具有正屈折力的第二透镜、具有负屈折力的第三透镜、具有正屈折力的第四透镜、以及具有负屈折力的第五透镜组组成，在变倍时，所述第一透镜、所述第二透镜、所述第三透镜、所述第四透镜以及所述第五透镜组中，相邻的透镜或透镜组的在光轴方向的间隔发生变化，所述第五透镜组由具有正屈折力的第五透镜和具有负屈折力的第六透镜组成，且满足下列关系式：f_Tele / f_Wide＞1.80；4.78≤LB_Tele / LB_Wide≤6.20；76.00≤ν1≤82.00；58.00≤ν2≤78.00；76.00≤ν6≤82.00。本发明在收缩时变得小型，在摄影时，Fno明亮，具有良好的光学特性。
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