Prism-Based Six-Element Camera Optical Lens for Wide-Angle Imaging
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Solution Overview
Problem
There is an urgent need for wide-angle camera lenses with good optical characteristics, small size, and fully corrected chromatic aberration, particularly for miniaturized camera optical lenses used in portable devices.
Innovation Solution
A six-piece lens structure is designed with a fourth lens as a prism, featuring specific refractive power relationships and curvature radii to achieve a balanced field of view, large aperture, and ultra-thin design, incorporating plastic materials for lenses and a reflective surface to reduce thickness and enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-piece lens structure is adopted to improve imaging quality, then imaging quality is improved, but device complexity and size increase
Solution Approach 1:
The optical lens system is divided into six individual lens elements with alternating positive and negative refractive powers, arranged in a specific sequence. This segmentation allows each lens to be optimized for specific optical functions (chromatic aberration correction, spherical aberration control, field curvature compensation) while collectively achieving high imaging quality that would be difficult to obtain with a single lens element.
Solution Approach 2:
The patent employs lens elements made from different materials with varying Abbe numbers (dispersion characteristics). Specifically, lenses with high Abbe numbers are combined with lenses having low Abbe numbers to correct chromatic aberration through material composition rather than relying solely on geometric design, thereby improving imaging quality while managing system complexity.
2Volume of moving object
If the pixel area of photosensitive devices is reduced to achieve miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The patent optimizes multiple optical parameters simultaneously including focal lengths (f1 through f6), curvature radii (R1 through R12), and thickness ratios (d1/TTL, d3/TTL, etc.) to maintain high imaging quality in a miniaturized format. The specific parameter ranges defined in the claims ensure that the reduced device size does not compromise the optical performance required for high-pixel photosensitive devices.
Solution Approach 2:
Each lens element in the six-piece structure serves multiple functions: correcting chromatic aberration, controlling spherical aberration, managing field curvature, and optimizing light distribution. This multi-functionality allows the compact lens system to achieve high imaging quality suitable for small-pixel photosensitive devices without requiring additional optical components that would increase size.
3Manufacturing precision
If a six-piece lens structure is used to achieve wide-angle and corrected chromatic aberration, then optical characteristics are improved, but manufacturing difficulty increases
Solution Approach 1:
The patent defines specific parameter ranges for lens focal lengths, curvature radii, and thickness ratios that balance optical performance with manufacturability. These optimized parameters ensure that the complex six-piece lens structure can be manufactured with standard tolerances while achieving wide-angle performance and chromatic aberration correction, avoiding the need for ultra-precise or custom manufacturing processes.
4Length of moving object
If lens thickness is reduced to achieve ultra-thin design, then device portability is improved, but optical performance deteriorates
Solution Approach 1:
The patent addresses the thickness limitation by optimizing the lateral dimensions and curvature radii of the lens elements. Instead of simply reducing thickness, the design adjusts the curvature and spacing of lens surfaces to maintain adequate optical path length and focal length within a thin profile, thereby preserving optical performance while achieving ultra-thin design suitable for portable 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 a wide-angle field of view, large aperture, and effective chromatic aberration correction, suitable for high-pixel mobile phone and digital camera imaging, while maintaining a compact size.
Implementation Method 1
The fourth lens is embodied as a prism... incorporating plastic materials for lenses and a reflective surface to reduce thickness and enhance imaging quality
Implementation Method 2
a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a positive refractive power
Data Source
AI summary
The disclosure relates to a camera optical lens. The camera optical lens includes a first lens having a negative refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a positive refractive power that are in order from an object side to an image side. The fourth lens is embodied as a prism, where the camera optical lens satisfies relationships: −4.00≤f2/f3≤−1.20 and 95.00≤(FOV×f)/IH≤101.632, where f2 represents a focal length of the second lens, f3 represents a focal length of the third lens, FOV represents a field of view of the camera optical lens, f represents a focal length of the camera optical lens, IH represents an image height of 1.0H of the camera optical lens.