Six-Lens Camera Assembly Aberration Correction via Parameter Optimization
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Solution Overview
Problem
Current camera lens assemblies face challenges in achieving high pixel and quality imaging while maintaining miniaturization and lightweight design, as increasing the number of lenses compromises these goals.
Innovation Solution
A camera lens assembly configuration with six lenses, each having specific refractive powers and surface curvatures, meeting certain focal length and thickness ratios, which improves spherical and comatic aberrations, and reduces volume and length, ensuring compactness and high imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to achieve higher pixel and quality imaging, then imaging quality is improved, but the volume and length of the camera lens assembly increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers, focal lengths, and surface curvatures of each lens element. Specific formulas are established to constrain the parameters (e.g., -2.0 < f6/f < -0.5, 0.3 < CT3/CT4 < 1.5) to achieve optimal imaging quality while maintaining compact dimensions. This systematic parameter optimization allows the lens assembly to correct aberrations effectively without requiring excessive lens elements or increased overall size.
2Manufacturing precision
If the number of lenses is increased to achieve higher pixel and quality imaging, then imaging quality is improved, but the length of the camera lens assembly increases
Solution Approach 1:
The patent employs parameter changes through established formulas that constrain the axial thickness ratios and focal length relationships. Specifically, the formula 0.3 < CT3/CT4 < 1.5 controls the relative thickness of adjacent lens elements, while -2.0 < f6/f < -0.5 regulates the focal length distribution. These parameter constraints enable effective aberration correction with a controlled number of lens elements, preventing excessive lengthening of the optical system.
Solution Approach 2:
The patent utilizes aspheric surface designs and complex surface curvature configurations (with specific radius ratios such as -0.5 < R12/R10 < 0.5) to correct aberrations in a different dimensional approach. Instead of simply adding more lens elements along the optical axis, the invention modifies the surface geometry and curvature distributions, thereby achieving improved imaging quality without proportionally increasing the axial length of the lens assembly.
3Volume of stationary object
If the lens thickness and curvature are optimized to maintain miniaturization, then compactness is improved, but imaging quality may deteriorate
Solution Approach 1:
The patent resolves this contradiction through systematic parameter optimization with established formulas. The thickness ratio constraint 0.3 < CT3/CT4 < 1.5 and focal length ratio -2.0 < f6/f < -0.5 are carefully balanced to maintain compact dimensions while ensuring sufficient optical power distribution. Additionally, the entrance pupil ratio constraint 0.2 < f/EPD ensures adequate light gathering capability. These coordinated parameter changes enable the lens assembly to achieve both miniaturization and high imaging quality simultaneously.
Solution Approach 2:
The patent employs sophisticated surface curvature designs with specific radius relationships (e.g., -0.5 < R12/R10 < 0.5, -2.1 < f6/f1 < 1.5) to maximize the optical efficiency of each lens element. By optimizing the curvature distributions and surface profiles within compact thickness constraints, the invention achieves effective aberration correction without requiring increased lens element sizes or spacings, thereby maintaining miniaturization while preserving imaging quality.
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 configuration enhances imaging quality by correcting aberrations, maintains miniaturization, and optimizes lens thickness and curvature to achieve a compact, high-performance camera lens assembly.
Implementation Method 1
The first lens has a positive refractive power. The second lens has a negative refractive power. The third lens has a positive refractive power. The fourth lens has a refractive power. The fifth lens has a refractive power. The sixth lens has a negative refractive power.
Data Source
AI summary
A camera lens assembly is provided, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side of the camera lens assembly to an image side of the camera lens assembly in turn. The first lens has a positive refractive power; the second lens has a negative refractive power, an object-side surface of the second lens is convex and an image-side surface of the second lens is concave; the third lens has a positive refractive power; the fourth lens has a refractive power, an object-side surface of the fourth lens is concave and an image-side surface of the fourth lens is convex; the fifth lens has a refractive power, an object-side surface of the fifth lens is convex and an image-side surface of the fifth lens is convex; the sixth lens has a negative refractive power.