Lens Microstructures for Stray Light Dispersion
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Solution Overview
Problem
Conventional tiny lenses, such as those in smartphone cameras, with high curvature to reduce stray light suffer from poor imaging performance.
Innovation Solution
The lens features microstructures, including recessed or protruded pyramid-shaped elements with matte surfaces, surrounding the optical portion to disperse stray light, thereby maintaining imaging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the lens is designed with high curvature to diminish stray light, then stray light is reduced, but imaging performance deteriorates
Solution Approach 1:
The patent applies local quality by creating microstructures only in the optical mechanism portion (molding portion) while keeping the optical portion smooth. This localized treatment allows stray light reduction at the edges without affecting the central imaging quality, resolving the contradiction between stray light reduction and imaging performance.
Solution Approach 2:
The lens is segmented into two functional zones: a smooth optical portion for high-quality imaging and a microstructured optical mechanism portion for stray light control. This segmentation allows each zone to optimize its specific function without compromising the other, addressing the contradiction between stray light reduction and imaging performance.
2Object-affected harmful factors
If microstructures are added to the lens to disperse stray light, then stray light is diminished, but device complexity increases
Solution Approach 1:
The patent merges the stray light control function directly into the lens molding process by integrating microstructures into the optical mechanism portion. This combines the lens forming and stray light control into a single component and process, reducing device complexity while maintaining stray light reduction effectiveness.
Solution Approach 2:
The microstructures in the optical mechanism portion serve dual purposes: they control stray light and are formed as an integral part of the lens molding process. The lens structure itself provides the stray light control function without requiring separate components, reducing overall device complexity.
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 microstructures effectively disperse stray light, improving imaging performance and yield rate by distributing light more evenly.
Implementation Method 1
A bottom of the at least one microstructure has a matte surface
Implementation Method 2
At least a part of an area of the optical mechanism portion is formed with at least one recessed microstructure
Implementation Method 3
plural protruded microstructures which are pyramid-shaped
Data Source
AI summary
A lens having microstructures has a first face and a second face. The first face has an optical portion at a central portion thereof. An optical mechanism portion is defined around the optical portion. The optical mechanism portion is formed with at least one recessed microstructure whose bottom has a matte surface.