Optical system

By designing a specific five-piece lens optical system, including spacers at specific locations, and meeting specific focal length ratio and interval relationships, the problem of poor assembly stability of five-piece optical system in the prior art is solved, and the more Good imaging quality and combinatorial stability.

CN119439452APending Publication Date: 2025-02-14ZHEJIANG SUNNY OPTICAL CO LTD
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Patent Information

Application Number
CN202411846104.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-02-14

AI Technical Summary

Technical Problem

When the five-piece optical system in the prior art meets the requirements of imaging size control, there is a problem of poor assembly stability.

Method used

By designing an optical system, the system includes five lenses and at least one spacer, the lens group consisting of a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and the spacer is located between the lenses , and meet specific focal length ratio and interval relationships to improve the assembly stability of the lens.

Benefits of technology

While controlling the imaging size, the overall shape and assembly stability of the third lens are improved, and the shape and assembly stability of the fourth lens are optimized, thereby improving the overall structure process and imaging quality of the optical system.

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Abstract

The invention provides an optical system. The optical system comprises a lens barrel, a lens group and at least one spacer, the lens group and the spacer are arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are the first lens, the second lens, the third lens, the fourth lens and the fifth lens; the at least one distance piece comprises a second distance piece, a third distance piece and a fourth distance piece; f3 / (EP2 + CT3) is greater than or equal to-3.23 and less than or equal to-3.05; f4 / EP34 is more than or equal to-17.45 and less than or equal to-13.71. The problem that a five-piece optical system in the prior art meets the requirement for imaging size control, and consequently the assembling stability is poor is solved.
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