Fixed focus optical system and camera module

By using a fixed-focus optical system composed of six lenses, the problem of high cost of high-pixel solutions and low resolution of medium- and low-pixel solutions in the optical design of automotive front-view cameras is solved, achieving imaging effects with high pixel count, high brightness, large aperture, long back focal length, low distortion, and good thermal stability.

CN122449734APending Publication Date: 2026-07-24ZHONGSHAN UNITED AUTOMOBILE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGSHAN UNITED AUTOMOBILE TECH CO LTD
Filing Date
2026-06-04
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In the existing optical design of automotive front-view cameras, high-pixel wide-angle single-lens solutions are costly, bulky, and have degraded edge image quality, while medium- and low-pixel solutions cannot support high-precision pixel resolution, making it difficult to meet the perception accuracy requirements of advanced autonomous driving.

Method used

A fixed-focus optical system consisting of six lenses optimizes light convergence and correction by rationally arranging the focal length and surface shape of the lenses, including the combination of negative and positive lenses, the design of cemented lens groups, and the use of glass spherical and aspherical lenses, thereby improving the field of view and image quality.

Benefits of technology

It achieves high-pixel count, high brightness, large aperture, long back focal length, low distortion, and good thermal stability imaging, reducing system complexity and cost, and enabling stable imaging in different temperature environments.

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Abstract

The application discloses a fixed focus optical system and a camera module, and relates to the technical field of optical systems.The fixed focus optical system has a subject side and an image side which are oppositely arranged along the optical axis direction.The fixed focus optical system is composed of a first lens, a second lens, a third lens, a cemented lens group, a sixth lens and an image plane which are sequentially arranged from the subject side to the image side.The cemented lens group comprises a fourth lens and a fifth lens which are arranged at intervals in the optical axis direction.The focal power of the first lens is negative, the focal power of the third lens is positive, the focal power of the cemented lens group is positive, the focal power of the fourth lens is positive, the focal power of the fifth lens is negative, and the focal power of the sixth lens is negative.Through the reasonable arrangement of the six lenses, the imaging quality of the fixed focus optical system is improved, and through the mutual combination of different lenses, the fixed focus optical system has the characteristics of high pixels, high brightness, large aperture, long back focus, small distortion, weak ghost image, good thermal stability and the like.
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