Six-element Camera Lens Design for Ultra-thin Wide-angle Imaging
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones and digital cameras, as existing lenses struggle to achieve high imaging quality with smaller pixel sizes and diverse user demands.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising specific plastic lenses with controlled refractive powers and curvature radii, optimized to achieve a short total optical length, low total optical length (TTL), and effective aberration correction, ensuring ultra-thin and wide-angle capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a three-piece or four-piece lens structure is used, then the lens thickness is reduced, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens system is divided into six separate lens elements (first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6) arranged in sequence from object side to image side. This segmentation allows each lens element to be optimized for specific optical functions, enabling comprehensive correction of chromatic aberrations and other optical defects while maintaining a compact overall structure suitable for mobile devices.
2Area of moving object
If the pixel size of photosensitive devices is reduced, then the device dimensions are smaller, but the imaging quality requirements become more stringent
Solution Approach 1:
Different lens elements are assigned specific refractive powers and material properties tailored to their positions in the optical system. The first lens L1 has positive refractive power, the second lens L2 has negative refractive power, and subsequent lenses have varying powers. This local optimization of optical properties at different positions enables effective correction of optical aberrations that become more pronounced with smaller pixel sizes, thereby maintaining high imaging quality in compact devices.
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 optical characteristics, including full correction of on-axis and off-axis chromatic aberrations, maintaining miniaturization while enhancing imaging quality and sensitivity, with a wide field of view and reduced lens thickness.
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, in sequence from an object side to an image side
Data Source
AI summary
The present disclosure relates to optical lens, in particular to a camera optical lens, comprising, from an object side to an image side in sequence: 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; wherein the camera optical lens satisfies the following conditions: 1.30≤f1/f≤2.00; 13.00≤R7/d7≤16.00, where f denotes a focus length of the camera optical lens; f1 denotes a focus length of the first lens; R7 denotes a curvature radius of an object side surface of the fourth lens; and d7 denotes an on-axis thickness of the fourth lens is d7. The camera optical lens may obtain high imaging performance and a low TTL.