Five-Lens Imaging Lens Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing imaging lenses for portable devices, such as digital cameras and smartphones, face challenges in achieving a small F number, high resolution, and short total length while adequately correcting aberrations, as previous designs either fail to sufficiently correct aberrations or have large F numbers.
Innovation Solution
A five-lens imaging lens configuration comprising a biconvex first lens, a meniscus second lens with a concave surface, a biconcave third lens, a meniscus fourth lens with a convex surface, and a biconcave fifth lens with an inflection point, optimized to satisfy specific focal length and refractive power ratios, which helps in achieving a small F number, short total length, and high resolution performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a five-lens configuration is used to achieve high resolution and correct aberrations, then imaging performance is improved, but total length increases
Solution Approach 1:
The patent applies parameter changes by optimizing the focal length ratios between lenses (specifically f/f1 and f/f3 relationships) and adjusting the refractive powers of individual lens elements. By carefully controlling these optical parameters, the design achieves high imaging performance with a five-lens configuration while keeping the total length shortened, resolving the contradiction between performance and compactness.
2Manufacturing precision
If the F number is reduced to improve light gathering capability, then imaging performance is improved, but aberration correction becomes more difficult
Solution Approach 1:
The patent applies local quality by assigning specific shapes and functions to individual lens elements within the five-lens configuration. The first lens is designed with a biconvex shape, the second with a meniscus shape having a concave surface toward the image side, and so on. Each lens element has optimized local optical properties that collectively achieve small F number while correcting aberrations across the field.
3Length of stationary object
If the total length is shortened for miniaturization, then device compactness is improved, but imaging performance deteriorates
Solution Approach 1:
The patent applies dynamics by optimizing the distribution of optical power across the five-lens configuration, allowing the system to achieve high imaging performance in a compact form. The dynamic optimization of focal length ratios (f/f1≥1.45 and f/f3≤-0.24) enables the lens system to maintain excellent aberration correction and resolution while achieving a shortened total length suitable for portable devices.
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 optimized lens configuration enables high-resolution imaging with a small F number and short total length, effectively correcting aberrations from central to peripheral angles of view, thereby enhancing the imaging performance of portable devices.
Implementation Method 1
a first lens of a biconvex shape; a second lens of a meniscus shape having a concave surface toward the image side; a third lens of a biconcave shape; a fourth lens of a meniscus shape having a convex surface toward the image side; and a fifth lens of a biconcave shape having at least one inflection point on the surface thereof toward the image side
Data Source
AI summary
An imaging lens is essentially constituted by five lenses, including: a first lens of a biconvex shape; a second lens of a meniscus shape having a concave surface toward the image side; a third lens of a biconcave shape; a fourth lens of a meniscus shape having a convex surface toward the image side; and a fifth lens of a biconcave shape having at least one inflection point on the surface thereof toward the image side, provided in this order from the object side.