Multi-element Optical Lens Design for Compact Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical lenses in electronic devices face challenges in achieving a small focal length, small effective diameter, wide view angle, and large aperture while maintaining high image quality, especially in low light environments.
Innovation Solution
The optical lens design comprises multiple symmetrical lens elements with aspheric surfaces, optimized using specific formulas to control spherical aberration, field curvature, and distortion, ensuring a small length and effective diameter while enhancing image quality through balanced power distribution and aperture size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the focal length is reduced to make the device thinner, then the device thickness decreases, but the aperture size and light gathering capability deteriorate
Solution Approach 1:
The optical lens is divided into multiple lens elements (first lens element with positive power, second lens element with negative power, third lens element with positive power) arranged in sequence. This segmentation allows each element to contribute differently to the overall optical performance, enabling short focal length while maintaining large aperture and good light gathering capability through coordinated power distribution.
2Adaptability or versatility
If the view angle is widened to capture more scenery, then the field of view increases, but the optical path length and device thickness increase
Solution Approach 1:
The patent employs asymmetric power distribution among lens elements and asymmetric surface curvatures (different radius of curvature values for object-side and image-side surfaces of each lens element). This asymmetric design enables wide view angle achievement while controlling the overall optical path length, preventing excessive device thickness.
3Manufacturing precision
If multiple lens elements are added to improve image quality and control aberrations, then the image quality and aberration control improve, but the device complexity and length increase
Solution Approach 1:
Each lens element is designed with specific local optical properties (different refractive indices, different Abbe numbers, different power values) tailored to address specific aberration types. The first lens element controls spherical aberration, the second element corrects chromatic aberration, and the third element refines the overall image quality. This localized optimization achieves high image quality with a relatively compact three-element structure.
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 a compact optical lens with improved image quality, reduced spherical aberration, and controlled distortion, enabling effective light capture and high image quality in low light conditions.
Implementation Method 1
The first surface 101 is aspheric and convex on the object side. The second surface 102 is aspheric. The second surface 102 is concave on the image side.
Data Source
AI summary
An optical lens of the present disclosure assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, an optical filter and an optical sensor. The first lens element, the fourth lens element and the fifth lens element each have positive power. The second lens element, the third lens element and the sixth lens element each have negative power.