Anamorphic Aspherical Lens Layout for Ultra-Wide Distortion Control
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Solution Overview
Problem
Conventional mobile phone lenses suffer from imaging distortion, especially in ultra-wide-angle settings, and distortion correction through algorithms leads to resolution loss and increased resource consumption.
Innovation Solution
Designing an optical lens with specific focal lengths and aspherical surfaces, including anamorphic aspherical surfaces, to enhance imaging quality and reduce distortion while maintaining a large field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ultra-wide-angle setting is implemented to increase field of view, then field of view is improved, but imaging distortion becomes more obvious
Solution Approach 1:
The optical lens is divided into six individual lens elements (first lens to sixth lens) with different focal powers and surface configurations. Each lens element contributes to correcting specific types of distortion, allowing the system to achieve ultra-wide-angle field of view (100° or more) while maintaining imaging quality through cumulative correction effects.
Solution Approach 2:
The patent employs anamorphic aspherical surfaces on specific lens elements (object side surface of first lens, image side surface of third lens, object side surface of fifth lens) that have asymmetric curvature profiles. These asymmetric surfaces are specifically designed to counteract the symmetric distortion patterns inherent in ultra-wide-angle optics, enabling distortion correction without sacrificing field of view.
2Manufacturing precision
If distortion compensation is performed by algorithm, then imaging distortion is reduced, but resolution is lost and system resources are consumed
Solution Approach 1:
The patent replaces software-based algorithmic distortion compensation with a hardware-based optical correction system. The six-lens optical design with specific anamorphic aspherical surfaces physically corrects distortion at the optical level, eliminating the need for post-processing algorithms that would otherwise consume system resources and reduce image resolution.
3Manufacturing precision
If real-time correction is implemented in video application, then imaging distortion is reduced, but device power consumption increases
Solution Approach 1:
The optical distortion correction is built into the physical lens structure itself, performing the correction function beforehand through the optical path design. The six-lens system with anamorphic aspherical surfaces corrects distortion as light passes through, eliminating the need for real-time computational correction during video recording, thus avoiding additional power consumption.
4Manufacturing precision
If more lenses are added to correct distortion, then imaging quality is improved, but device thickness increases
Solution Approach 1:
The six lens elements are arranged in a compact nested configuration within the optical lens housing. Each lens element is positioned closely to its neighbors, with the overall structure optimized to minimize the total optical path length and housing thickness while maintaining the necessary spacing for effective distortion correction.
Solution Approach 2:
The patent uses specific focal length ratios and surface curvature parameters for each lens element to optimize the compactness of the overall system. By carefully controlling parameters such as the ratio of focal lengths between adjacent lenses and the curvature radii of aspherical surfaces, the design achieves effective distortion correction in a thinner profile.
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 optical lens achieves ultra-wide-angle photography with reduced distortion and improved imaging quality without consuming additional system resources.
Implementation Method 1
object side surfaces and image side surfaces of the first lens to the sixth lens include at least one anamorphic aspherical surface
Data Source
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AI summary
This application provides an optical lens, a camera module, and an electronic device. The optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens that are sequentially arranged from an object side to an image side. The first lens, the third lens, and the fifth lens all have positive focal power, the second lens and the fourth lens both have negative focal power, and the sixth lens has positive focal power or negative focal power. Object side surfaces and image side surfaces of the first lens to the sixth lens include at least one anamorphic aspherical surface. When the optical lens is applied to the camera module and the electronic device, the camera module and the electronic device can implement ultra-wide-angle photographing, and can also resolve a distortion problem in ultra-wide-angle imaging to a large degree.