Camera Lens Design with Aspheric Lenses for Aberration Correction
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Solution Overview
Problem
Current camera lenses with high-pixel CCD and CMOS camera elements face challenges in achieving ultrathin and high-luminous flux wide-angle designs with excellent optical properties, requiring higher production technical demands and increased manufacturing costs.
Innovation Solution
A camera lens configuration comprising a first lens with positive refractive power, a second lens with positive refractive power, and a third lens with negative refractive power, along with a glass plate for IR cut-off filtering, optimized by specific curvature radius and thickness conditions to correct aberrations and reduce production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera lens is designed with three ultrathin lenses to achieve excellent optical properties, then optical performance is improved, but production technical demands increase and manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution among the three lenses, specifically setting the first lens with positive refractive power, the second lens with negative refractive power, and the third lens with positive refractive power. By controlling the ratio of refractive powers and adjusting curvature radii and thickness parameters within specific ranges, the patent achieves excellent optical performance while simplifying production requirements compared to conventional designs
2Reliability
If a camera lens is designed with three ultrathin lenses to achieve excellent optical properties, then optical performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent reduces manufacturing cost through parameter optimization by establishing specific ranges for lens thickness, curvature radii, and refractive power ratios. These parameter constraints enable mass production with standard manufacturing processes, avoiding the need for expensive custom fabrication while maintaining excellent optical performance
Solution Approach 2:
The patent applies local quality by assigning different refractive powers and material properties to each lens element based on its position in the optical system. The first and third lenses use positive refractive power while the second lens uses negative refractive power, with each lens optimized for its specific function in the overall optical path, achieving cost-effective performance distribution
3Reliability
If an optical system is designed to correct most aberration, then image quality is improved, but production technical demands increase
Solution Approach 1:
The patent corrects most aberrations by optimizing parameter combinations including the ratios of refractive powers (f/f1, f/f2, f/f3), curvature radii (R1, R2, R3, R4), and thickness parameters (d1, d2, d3). These parameter constraints enable aberration correction through precise geometric optimization rather than complex manufacturing processes, reducing production technical demands while maintaining high image 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 solution achieves excellent optical properties and higher productivity while reducing production costs, enabling the development of miniature and wide-angle camera lenses with improved image quality and corrected aberrations.
Implementation Method 1
a first lens with positive refractive power
Implementation Method 2
a second lens with positive refractive power
Implementation Method 3
a third lens with negative refractive power
Implementation Method 4
a glass plate for IR cut-off filtering
Data Source
AI summary
A camera lens is disclosed and includes a first lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces; an aperture; a second lens with positive refractive power, whose object side surface and image side surface are both aspheric surfaces; and a third lens with negative refractive power, whose object side surface and image side surface are both aspheric surfaces. Specific conditions are satisfied.