Six-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
Conventional six-piece camera lens structures for handheld devices face challenges in achieving high optical performance due to irrational refractive power settings, lens spacing, and shape, which hinder their ability to satisfy design requirements for long focal lengths while maintaining good imaging quality.
Innovation Solution
A six-piece camera optical lens design with specific refractive power distributions and surface shapes among its lenses, including aspherical surfaces, to correct aberrations and improve imaging quality, with conditions such as 0.35≤f1/f≤0.60 and −5.70≤f2/f≤−2.50 for the first and second lenses, and 2.00≤d10/d9≤5.00 for the fifth and sixth lenses, ensuring appropriate refractive power distribution and lens spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a six-piece lens structure is used to improve imaging quality, then optical performance is improved, but the lens structure cannot achieve high optical performance while satisfying design requirements for long focal length due to irrational refractive power settings and lens spacing
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution among the six lenses and adjusting lens spacing parameters. Specifically, it sets the refractive powers of the first six lenses as +−+−−+ and establishes specific ratio relationships (0.35≤f1/f≤0.60, −5.70≤f2/f≤−2.50, 2.00≤d10/d9≤5.00) to achieve long focal length while maintaining good imaging quality and reducing aberrations.
2Length of moving object
If refractive power settings and lens spacing are optimized to achieve long focal length, then focal length requirement is satisfied, but imaging quality deteriorates due to irrational settings in conventional designs
Solution Approach 1:
The patent applies local quality by assigning different refractive powers and surface shapes to different lens elements. The first lens has positive refractive power with convex object-side surface, the second lens has negative refractive power, and subsequent lenses have alternating powers. This localized optimization of each lens element's properties enables the system to achieve long focal length while maintaining imaging quality through balanced aberration correction.
3Ease of manufacture
If conventional six-piece lens design is used, then basic imaging function is achieved, but aberration correction is insufficient due to irrational lens shape and spacing settings
Solution Approach 1:
The patent applies spheroidality by configuring specific lens surfaces as aspherical surfaces to correct aberrations. The first lens has an aspherical object-side surface, the second lens has an aspherical image-side surface, and other lenses have aspherical surfaces as needed. This curvature optimization enables precise aberration correction while maintaining manufacturability through standard aspherical surface processing techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves high optical performance and satisfies design requirements for long focal lengths by optimizing refractive power distribution and surface shapes, resulting in improved imaging quality and reduced lens length.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6... the first lens L1 has a positive refractive power... the second lens L2 has a negative refractive power
Data Source
AI summary
The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: an aperture; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power. The camera optical lens satisfies following conditions: 0.35≤f1/f≤0.60; and −5.70≤f2/f≤−2.50, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; and f2 denotes a focal length of the second lens. The camera optical lens can achieve a high optical performance while satisfying design requirements for a long focal length.