Camera Lens Aberration Correction Wide Angle Design
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Solution Overview
Problem
Existing camera lenses with 4 lenses fail to achieve sufficient wide-angle and high-luminous flux performance due to inadequate distribution of refractive power and shape of the lenses, resulting in insufficient aberration correction and image distortion.
Innovation Solution
A camera lens design comprising 4 lenses with specific refractive power distributions and non-spherical surfaces, where the first lens has positive refractive power, the second lens has negative refractive power, and the third and fourth lenses also have positive and negative refractive powers respectively, with optimized focal distances and curvature radii to achieve ultra-thin and wide-angle capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the camera lens uses a conventional 4-lens structure with positive-negative-positive-negative refractive power distribution, then the lens can be made ultra-thin, but the total angle of view is limited to less than 74.2° and the f-value is greater than or equal to 2.41
Solution Approach 1:
The patent changes the refractive power distribution parameters of the four lenses, specifically setting the first lens with positive refractive power (F1/F = 0.6-1.0), the second lens with negative refractive power (F2/F = -0.6 to -1.0), the third lens with positive refractive power (F3/F = 0.4-0.8), and the fourth lens with negative refractive power (F4/F = -0.4 to -0.8). This parameter optimization enables the lens to achieve both ultra-thin thickness and wide angle of view greater than 80° while maintaining f-value less than 2.2
2Ease of manufacture
If the camera lens uses conventional lens shapes and refractive power distribution, then the manufacturing process is simple, but aberration correction is insufficient and image distortion occurs
Solution Approach 1:
The patent applies different refractive indices and shapes to different lens elements. The first and third lenses use positive refractive power with specific curvature radii (R1, R2 for first lens; R5, R6 for third lens), while the second and fourth lenses use negative refractive power (R3, R4 for second lens; R7, R8 for fourth lens). This local differentiation of optical properties enables effective correction of spherical aberration, coma, and chromatic aberration while maintaining manufacturability
Solution Approach 2:
The patent employs curved surfaces with specific radius values for all four lenses. The aspherical coefficients (k1, k2, k3, k4) are optimized to correct optical aberrations. For example, the first lens has aspherical coefficient k1 between -0.3 and -0.1, the second lens has k2 between -0.2 and 0.2, the third lens has k3 between -0.3 and -0.1, and the fourth lens has k4 between -0.2 and 0.2. These curvature optimizations achieve excellent optical properties while remaining compatible with conventional manufacturing processes
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 a camera lens with excellent optical properties, achieving a total angle of view greater than 80° and f-value less than 2.2, while effectively correcting aberrations and maintaining ultra-thin and high-luminous flux performance.
Implementation Method 1
a first lens with positive refractive power
Implementation Method 2
a second lens with negative refractive power
Implementation Method 3
a third lens with positive refractive power
Implementation Method 4
a fourth lens with negative refractive power
Data Source
AI summary
A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power. The camera lens satisfies specific conditions.