7-Element Camera Lens Aberration Correction
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones and digital cameras, where the shrinking pixel size of photosensitive devices and increasing demand for high imaging quality require more complex lens structures.
Innovation Solution
A 7-piece camera optical lens design is proposed, with specific constraints on the refractive power, curvature radii, and thickness of each lens element to achieve ultra-thin and wide-angle capabilities while minimizing chromatic aberration, using a combination of plastic and glass materials to optimize imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a three-piece or four-piece lens structure is used, then the lens can be manufactured with simpler structure, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens is divided into seven separate lens elements with different optical properties (positive and negative refractive powers). Each lens element is optimized independently to correct specific aberrations, with the first lens having negative refractive power to correct chromatic aberration, followed by alternating positive and negative elements to progressively refine image quality while maintaining overall system correction.
2Length of moving object
If the lens is designed to be ultra-thin, then it can meet the miniaturization requirements of handheld devices, but the optical performance and aberration correction may be compromised
Solution Approach 1:
The patent optimizes specific parameter ranges including the ratio of focal lengths (f1/f between -3 and -1), refractive indices (n7 between 1.7 and 2.2), and thickness ratios (d13/TTL between 0.01 and 0.2). These parameter constraints enable the ultra-thin design to achieve both miniaturization and high optical performance by precisely controlling the optical properties of each element rather than relying on simple geometric scaling.
3Adaptability or versatility
If the lens is designed for wide-angle capability, then it can capture broader fields of view, but chromatic aberration and other optical distortions increase
Solution Approach 1:
Different lens elements are assigned specific local functions: the first lens element with negative refractive power specifically targets chromatic aberration correction, while subsequent elements with alternating positive and negative powers address spherical aberration, field curvature, and other off-axis distortions. This localized optimization of each element's optical properties enables comprehensive correction across the wide field of view.
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 achieves high-performance imaging with reduced sensitivity and corrected aberrations, maintaining miniaturization characteristics and improving image quality across various angles, effectively addressing the challenges of ultra-thin and wide-angle lens development.
Implementation Method 1
from the object side to the image side, the camera optical lens comprises in sequence: an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens
Data Source
AI summary
The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.