Five-Lens Camera Module with Aspheric Elements for Ultra-Thin Wide-Angle Design
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Solution Overview
Problem
Existing camera lenses with five-piece configurations face challenges in achieving ultra-thin and wide-angle designs with optimal optical properties due to insufficient refractive power distribution and improper lens shapes, particularly in the first and fourth lenses, which hinder aberration correction and ultra-thin development.
Innovation Solution
A camera lens design comprising five lenses with specific refractive power distributions and aspheric shapes, including a glass plate or optical filter between the fifth lens and the imaging surface, adhering to specific focal length and curvature radius conditions to enhance optical performance and correct aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the camera lens uses a five-piece configuration with conventional refractive power distribution, then the lens can achieve basic wide-angle functionality, but the lens thickness cannot be reduced sufficiently and optical aberrations are not well corrected
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution among the five lenses and specifying precise curvature radius relationships (R1, R2, R3, R4, R5, R6, R7, R8) to achieve both ultra-thin profile and excellent aberration correction. The conditional expressions for refractive powers (f1, f2, f3, f4, f5) and curvature radii are carefully tuned to balance thickness reduction with optical performance.
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements to correct optical aberrations while maintaining thin profile. The aspheric coefficients (A4, A6, A8, A10, A12, A14, A16) are optimized to achieve superior aberration correction compared to conventional spherical lenses, enabling ultra-thin design without sacrificing optical quality.
2Length of moving object
If the first lens and fourth lens use conventional shapes, then the lens assembly can be manufactured with standard processes, but the refractive power distribution is insufficient and the lens cannot achieve ultra-thin dimensions
Solution Approach 1:
The patent specifies precise parameter ranges for the first and fourth lenses including curvature radii (R1, R2 for first lens; R7, R8 for fourth lens) and refractive powers (f1, f4) that enable ultra-thin design. These parameter optimizations allow standard manufacturing processes to produce lenses with enhanced optical performance and reduced thickness.
Solution Approach 2:
The patent introduces aspheric surfaces on the first and fourth lenses with optimized aspheric coefficients to achieve the required curvature profiles. This enables the lenses to provide sufficient refractive power in a thinner form factor while maintaining manufacturability through established aspheric lens fabrication techniques.
3Length of moving object
If the lens design prioritizes ultra-thin profile, then the lens thickness is reduced, but the refractive power distribution becomes insufficient and optical properties deteriorate
Solution Approach 1:
The patent optimizes the refractive power distribution across all five lenses with specific conditional expressions (0.3 < f2/f < -0.6, -0.6 < f3/f < -1.5, 0.6 < f4/f < 1.3) to ensure sufficient light gathering capability in an ultra-thin configuration. The F-number is controlled within 1.8 to 2.4 to maintain adequate luminous flux while achieving reduced thickness.
Solution Approach 2:
The patent uses aspheric surfaces on all five lens elements to maximize light transmission and correct optical aberrations in the ultra-thin design. The aspheric coefficients are optimized to ensure efficient light gathering and proper focal point formation despite the reduced lens thickness, maintaining excellent luminous flux performance.
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 enables the production of wide-angle camera lenses that are ultra-thin with excellent optical properties, effectively correcting aberrations and maintaining a balance between wide-angle development and ultra-thin trends.
Implementation Method 1
a first lens L1 having positive refractive power; a second lens L2 having negative refractive power; a third lens L3 having negative refractive power; a fourth lens L4 having positive refractive power and a fifth lens L5 having negative refractive power
Data Source
AI summary
A camera lens is disclosed. The camera lens includes: a first lens with positive refractive power; a second lens with negative refractive power; a third lens with negative refractive power; a fourth lens with positive refractive power; a fifth lens with negative refractive power which are arranged in an order from an object side to an image side. The camera lens is characterized in that it meets specified conditions.