Six-Lens Camera Module Refractive Power Optimization
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Solution Overview
Problem
Existing camera lenses with six-piece configurations for mobile and web camera modules suffer from insufficient refractive power distribution and improper lens shapes, leading to wide angles and suboptimal optical performance.
Innovation Solution
A camera lens design comprising six lenses with specific refractive power distributions and aspheric shapes, meeting conditions such as 0.35≤f1/f≤0.50 and 1.90≤(R5+R6)/(R5−R6)≤2.80, to achieve a narrow angle of view (≤50°) and small size with excellent optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a six-piece lens configuration is used with conventional refractive power distribution, then the lens can be compact, but the optical performance deteriorates due to insufficient refractive power in the first lens and improper third lens shape
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution parameters of each lens element. Specifically, the first lens is designed with refractive power of +3.00 to +5.00, the second lens with -2.00 to -4.00, the third lens with -1.00 to -3.00, the fourth lens with +1.00 to +3.00, the fifth lens with -1.00 to -3.00, and the sixth lens with -1.00 to -3.00. These parameter optimizations resolve the contradiction by achieving both compact size and excellent optical performance through precise control of each lens's refractive characteristics.
Solution Approach 2:
The patent implements local quality by assigning different refractive power characteristics to different lens elements based on their specific positions and functions. Each lens element is designed with customized refractive power and shape parameters tailored to its role in the optical system, allowing the first lens to provide strong positive refractive power while subsequent lenses provide negative refractive power for correction, thereby achieving optimal optical performance in a compact configuration.
2Adaptability or versatility
If the lens is designed for wide angle view, then the field of view is increased, but the refractive power distribution becomes insufficient and optical aberrations increase
Solution Approach 1:
The patent resolves this contradiction by changing the optical parameters to achieve a narrow angle of view (≤50°) while maintaining excellent optical performance. The refractive power parameters are optimized to control the focal length and field of view, ensuring that the lens provides sufficient refractive power in the first lens (+3.00 to +5.00) to achieve the desired narrow angle while subsequent lenses correct for aberrations, thereby improving optical performance rather than degrading it.
3Ease of manufacture
If conventional lens shapes are used, then the manufacturing process is simpler, but the optical performance is suboptimal due to improper third lens shape
Solution Approach 1:
The patent applies parameter changes by optimizing the shape parameters of the third lens specifically, designing it with a curvature ratio (R5+R6)/(R5-R6) within 1.90 to 2.80. This parameter optimization resolves the contradiction by achieving both ease of manufacture and optimal optical performance through precise control of the third lens geometry, which plays a critical role in correcting optical aberrations while remaining manufacturable.
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 small-sized, narrow-angle camera lenses with improved optical performance, correcting aberrations and maintaining a total angle of view of ≤50°, thus addressing the limitations of previous designs.
Implementation Method 1
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 and a fifth lens with negative refractive power; a sixth lens with 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; and a sixth lens with negative refractive power. The camera lens further satisfies specific conditions.