Six-Lens Camera Module with Aspheric Elements for Wide-Angle Brightness
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Solution Overview
Problem
Existing camera lenses for mobile devices and webcams with high-pixel camera elements face challenges in achieving ultra-thin, high-luminous flux, and wide-angle designs with excellent optical properties, as previous designs often have insufficient refractive power distribution and improper lens shapes, leading to suboptimal performance in brightness and thinness.
Innovation Solution
A camera lens composed of six pieces with specific refractive power distributions and aspheric shapes, meeting conditions for focal distances and curvature radii to achieve an ultra-thin, high-luminous flux, and wide-angle design with improved optical properties, including a glass plate or optical filter between the sixth lens and the imaging surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the camera lens uses conventional lens designs, then the structure is simple, but the F number is too large (Fno≥2.04) and insufficient brightness is achieved
Solution Approach 1:
The camera lens is divided into six separate lens elements with alternating positive and negative refractive powers. This segmentation allows each element to contribute specifically to correcting aberrations and controlling light paths, enabling the achievement of Fno≤1.80 while maintaining manageable structural complexity through modular design
Solution Approach 2:
Each lens element is designed with specific local optical properties - the first lens has positive refractive power with specific curvature ratios, the second and fourth have negative refractive power, and each subsequent element has optimized local characteristics. This local quality differentiation allows precise control of light paths to achieve high brightness while correcting various aberrations
2Length of moving object
If the camera lens uses conventional lens shapes, then manufacturing is easier, but the lens cannot achieve ultra-thin design with TTL/IH≤1.50
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements instead of conventional spherical surfaces. This curvature variation allows precise control of light paths to achieve ultra-thin optical length (TTL/IH≤1.50) while the aspheric coefficients are optimized to balance manufacturing feasibility with performance requirements
Solution Approach 2:
The patent optimizes multiple parameters including curvature radii ratios (R1+R2)/(R1-R2), refractive powers, and aspheric coefficients for each lens element. These parameter changes enable the achievement of ultra-thin design while maintaining manufacturability through systematic optimization of the lens configuration
3Adaptability or versatility
If the camera lens has insufficient refractive power distribution, then lens shape is simpler, but wide angle performance (2ω≥76°) cannot be achieved
Solution Approach 1:
The refractive power is segmented across six lens elements with alternating positive and negative signs. This segmentation allows each element to contribute to the overall wide angle performance (2ω≥76°) while the distributed complexity is managed through systematic arrangement, achieving adaptability without overwhelming device complexity
Solution Approach 2:
Each lens element is assigned specific local refractive power characteristics - the first lens has positive power with optimized curvature, the second and fourth have negative power for aberration correction, and subsequent elements have tailored local properties. This local quality assignment enables wide angle performance while the systematic distribution keeps the overall system manageable
4Illumination intensity
If the first lens shape is improper, then manufacturing is easier, but Fno is too large and brightness is insufficient
Solution Approach 1:
The first lens is designed with specific parameter ranges including curvature radius ratios (R1+R2)/(R1-R2) and optimized aspheric coefficients. These parameter changes are carefully selected to achieve the required brightness (Fno≤1.80) while remaining within manufacturing capabilities, balancing performance enhancement with ease of manufacture
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 solution enables the production of camera lenses with optical length to image height ratio ≤1.50, ultra-thin design, wide angle ≥76°, and F number ≤1.80, resulting in excellent optical properties and improved brightness while correcting aberrations effectively.
Implementation Method 1
a first lens with positive refractive power; a second lens with negative refractive power; a third lens with positive refractive power; a fourth lens with negative refractive power and a fifth lens with positive 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 positive refractive power; a fourth lens with negative refractive power; a fifth lens with positive refractive power; and a sixth lens with negative refractive power. The camera lens further satisfies specific conditions.