Imaging optical lens

By designing a camera optical lens structure consisting of a first prism and multiple lenses, the problem of insufficient optical performance of periscope telephoto cameras was solved, realizing a camera lens with a large aperture, long focal length, and miniaturization, suitable for mobile phones and web cameras with high-pixel camera elements.

WO2026143483A1PCT designated stage Publication Date: 2026-07-09CHANGZHOU RAYTECH OPTRONICS CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CHANGZHOU RAYTECH OPTRONICS CO LTD
Filing Date
2024-12-31
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

The optical performance of existing periscope telephoto camera lenses cannot meet the design requirements of miniaturization, long focal length and large aperture, and the total optical length of traditional telephoto cameras is too large, which is not suitable for the thin and light design of smartphones.

Method used

The camera optical lens structure consists of a first prism, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The focal length is adjusted by moving the second group. Combined with the prism reflective surface design, the focal length requirements under different conditions are met. Furthermore, by defining the relationship between the curvature radius, focal length, and total optical length of each lens, miniaturization and good optical performance are achieved.

Benefits of technology

It achieves large aperture, long focal length and miniaturization of camera optical lenses, suitable for high-pixel CCD and CMOS camera elements, especially mobile phone camera lens components and WEB camera lenses, with excellent optical characteristics and imaging quality.

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    Figure CN2024144492_09072026_PF_FP_ABST
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Abstract

An imaging optical lens (10, 20, 30, 40, 50, 60), composed of a first prism (P1), a first lens (L1) having a negative refractive power, a second lens (L2) having a positive refractive power, a third lens (L3) having a negative refractive power, a fourth lens (L4) having a positive refractive power, and a fifth lens (L5), which are arranged in sequence from an object side to an image side, wherein the first lens (L1) forms a first group, and the second lens (L2), the third lens (L3), the fourth lens (L4) and the fifth lens (L5) form a second group. The second group is movable along an optical axis of the imaging optical lens for adjustment, such that the imaging optical lens (10, 20, 30, 40, 50, 60) is switched between a first state and a second state. A focal length of the imaging optical lens (10, 20, 30, 40, 50, 60) in the first state is defined as fA, and an image height of the imaging optical lens (10, 20, 30, 40, 50, 60) is defined as IH, satisfying the following relational expression: 4.60≤fA / IH≤4.90. The imaging optical lens (10, 20, 30, 40, 50, 60) can achieve a large-aperture periscopic design and has a good optical performance.
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