Six-element Camera Lens for Miniaturization and Aberration Control
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Solution Overview
Problem
There is a growing demand for ultra-thin, wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration for handheld devices, as existing miniature camera lenses struggle to achieve high imaging quality due to limitations in lens structures and pixel size.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of plastic materials with specific refractive powers and curvature radii, optimized to achieve a short total optical length, low F-number, and effective aberration correction, ensuring high performance and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional three-piece or four-piece lens structure is used, then the lens structure is simple, but the imaging quality is insufficient and chromatic aberration is not fully corrected
Solution Approach 1:
The lens is divided into six separate optical elements (first lens through sixth lens) with different refractive powers and aberration correction characteristics. Each lens segment is optimized independently to correct specific types of aberration, achieving comprehensive optical performance that cannot be obtained with fewer elements.
Solution Approach 2:
The lens employs a composite structure combining positive and negative refractive power elements, aspherical surfaces, and inflection points in a single six-piece configuration. This composite design integrates multiple correction functions into one unified lens system, achieving both wide-angle coverage and precise aberration correction.
2Length of moving object
If the lens is made ultra-thin to meet miniaturization requirements, then the total optical length is reduced, but the imaging quality and aberration correction deteriorate
Solution Approach 1:
The lens employs aspherical surfaces on multiple lens elements (first lens, second lens, third lens, and sixth lens) to correct spherical aberration and optimize light paths. The aspherical curvature allows for compact lens design while maintaining high imaging quality, enabling ultra-thin total optical length without sacrificing optical performance.
Solution Approach 2:
The lens design incorporates inflection points (saddle surfaces) on the third lens to correct field curvature and distortion. By utilizing higher-order surface geometries beyond simple spheres or planes, the lens achieves comprehensive aberration correction within a compact, ultra-thin structure.
3Area of moving object
If the lens is designed for wide-angle view, then the field of view is increased, but chromatic aberration and distortion increase
Solution Approach 1:
Different lens elements are assigned specific local functions: the first lens provides positive refractive power and wide-angle coverage, the second lens provides negative refractive power for distortion control, the third lens with inflection point corrects field curvature, and the sixth lens with aspherical surface corrects chromatic aberration. This localized optimization ensures wide-angle view without compromising aberration correction.
Solution Approach 2:
The lens design optimizes multiple parameters simultaneously including refractive indices, curvatures, thicknesses, and spacing between elements to achieve the desired balance between wide field of view and aberration correction. By carefully adjusting these parameters, the lens achieves both wide-angle coverage and minimal chromatic aberration.
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 excellent imaging quality with fully corrected chromatic aberrations, maintaining miniaturization and providing a wide-angle view, enhancing the optical characteristics of camera lenses for handheld devices.
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
Data Source
AI summary
The present invention discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The second lens has a negative refractive power, and the third lens has a positive refractive power. The camera optical lens further satisfies the specific conditions: 0.80≤f1/f≤5.00 and −11.00≤R5/d5≤−8.00. The camera optical lens can achieve a high performance while obtaining a low TTL.