Five-Lens Imaging Unit Aberration Correction via Parameter Optimization
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Solution Overview
Problem
Current compact camera modules with five lenses fail to provide optimal optical characteristics and aberration performance as desired by users, particularly in portable devices like smartphones, due to limitations in design and material selection.
Innovation Solution
An imaging lens unit comprising five lenses with specific refractive powers and arrangements, including a meniscus-shaped fourth lens and high dispersion materials, optimized with conditional expressions for Abbe numbers, curvature radii, and focal lengths to enhance aberration correction and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If five lenses are used in the imaging lens unit, then the compact size is achieved, but the optical characteristics and aberration performance deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers, Abbe numbers, and curvature radii of each lens within specific numerical ranges. By carefully selecting and adjusting these optical parameters, the design achieves both compact size and improved aberration correction, resolving the contradiction between miniaturization and optical performance
Solution Approach 2:
The patent uses composite material principles by combining lenses with different Abbe numbers (dispersion characteristics) and refractive powers. Specifically, it employs a combination of positive and negative power lenses with carefully selected Abbe numbers to correct chromatic and spherical aberrations, achieving high optical performance in a compact five-lens configuration
2Volume of moving object
If five lenses are used in the imaging lens unit, then the compact size is achieved, but the aberration characteristics deteriorate
Solution Approach 1:
The patent optimizes specific optical parameters including the Abbe numbers of individual lenses (v1, v2, v3, v4 within specified ranges) and curvature radii (r1 through r10) to correct aberrations. By adjusting these parameters within defined ranges, the design achieves excellent aberration correction while maintaining compact dimensions
Solution Approach 2:
The patent applies local quality by assigning specific functional characteristics to different lenses within the system. Each lens is designed with particular refractive power and Abbe number characteristics tailored to its position in the optical path, enabling targeted correction of specific aberration types at different locations in the optical system
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 provides excellent aberration characteristics, high resolving power, and a compact form suitable for portable devices, effectively addressing the limitations of existing designs by improving optical performance and marketability.
Implementation Method 1
a first lens having a positive (+) power; a second lens having a negative (−) power; a third lens having positive (+) or negative (−) power; a fourth lens having a negative (−) power; and a fifth lens having a negative (−) power
Data Source
AI summary
Disclosed herein is an imaging lens unit, including: a first lens having a positive (+) power; a second lens having a negative (−) power; a third lens having power; a fourth lens having a negative (−) power; and a fifth lens having a negative (−) power, wherein the first lens, the second lens, the third lens, the fourth lens, and fifth lens are arranged in order from an object to be formed as an image, and the fourth lens is convex toward an image side.