Seven-Element Camera Lens for Large-Aperture, Ultra-Wide Imaging
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Solution Overview
Problem
There is an urgent need for wide-angle camera lenses with excellent optical characteristics, compact size, and fully corrected aberrations, particularly for handheld devices like smartphones and digital cameras, to meet the demands of miniaturization and improved imaging quality.
Innovation Solution
A seven-element camera optical lens design is proposed, comprising specific refractive properties and curvature relationships for each lens, including materials like glass and plastic, to achieve a large aperture, ultra-thinness, and ultra-wide angle, with optimized focal lengths and Abbe numbers to correct chromatic aberration and spherical aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-element lens structure is employed to achieve better imaging quality, then optical performance is improved, but device complexity increases
Solution Approach 1:
The lens system is divided into seven distinct lens elements with alternating positive and negative refractive forces, where each element is optimized for specific aberration correction. This segmentation allows complex optical functions to be distributed across multiple simpler components, achieving high imaging quality while maintaining manufacturability.
Solution Approach 2:
The patent employs lens elements with different Abbe numbers (v1=60.00-82.00 for the first lens) to correct chromatic aberrations. By combining materials with different optical properties, the system achieves superior color correction and imaging quality without requiring overly complex individual lens elements.
2Length of moving object
If the lens is designed for ultra-thinness to meet miniaturization demands, then device size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for lens thickness ratios (d1/TTL=0.06-0.21, d3/TTL=0.02-0.05, d5/TTL=0.03-0.12) and curvature relationships to achieve ultra-thin profile while maintaining optical performance. These parameter optimizations allow the lens to be miniaturized without compromising image quality or requiring excessive manufacturing precision.
Solution Approach 2:
The seven lens elements are arranged in a compact nested configuration with optimized air gaps (d4/d6=1.50-5.00) between elements, allowing the entire optical system to be compressed into an ultra-thin form factor while maintaining proper optical spacing and alignment.
3Adaptability or versatility
If the lens is designed for wide-angle with large aperture to meet user demands, then field of view is improved, but aberration correction becomes more difficult
Solution Approach 1:
The lens system employs a dynamic balance of positive and negative refractive forces across the seven elements, with the first lens having positive refractive force (f1/f=0.95-1.25) and subsequent elements alternating to correct wide-angle aberrations. This dynamic optical design enables wide field of view while automatically compensating for distortion and other wide-angle specific aberrations.
Solution Approach 2:
The patent converts the inherent aberrations introduced by wide-angle design into opportunities for correction by strategically placing negative refractive force elements (2nd, 4th, and 7th lenses) that specifically target and neutralize distortion and coma, turning the wide-angle challenge into a demonstrated strength with full aberration correction.
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 lens design achieves excellent optical performance with a large aperture, wide angle, and ultra-thinness, suitable for high-pixel camera elements in smartphones and web cameras, while reducing assembly difficulties and improving yield rates.
Implementation Method 1
a first lens having a positive refractive force
Implementation Method 2
a second lens having a negative refractive force
Implementation Method 3
a central radius of curvature of an objective surface of the seventh lens is R13; a central radius of curvature of an image surface of the seventh lens is R14
Data Source
AI summary
The present application relates to the field of optical lenses and discloses a camera optical lens, comprising seven lenses. The seven lenses are in order from the objective surface to the image surface: a first lens having a positive refractive force, a second lens having a negative refractive force, a third lens having a positive refractive force, a fourth lens having a negative refractive force, a fifth lens having a refractive force, a sixth lens having a positive refractive force and a seventh lens having a negative refractive force; and the following relationship expressions are satisfied: 0.95≤f1/f≤1.25; 60.00≤v1≤82.00; −4.00≤R13/R14≤−1.00; and 1.50≤d4/d6≤5.00. The camera optical lens provided by the present application has excellent optical performance while satisfying the design requirements of large aperture, ultra-thinness, and ultra-wide angle.