Lens Module Rib Structures for Light Attenuation
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Solution Overview
Problem
Conventional plastic lens elements in compact lens modules suffer from high reflectivity, leading to non-imaging light being reflected and affecting image quality, which is a challenge in achieving high-resolution images in portable electronic devices with camera functionalities.
Innovation Solution
A plastic lens element design featuring a peripheral portion with strip-shaped rib structures arranged around an effective optical portion, where the rib structures are indirectly connected and have a width between 0.01 mm and 0.05 mm, enhancing light attenuation and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional plastic lens element with a smooth surface is used, then the manufacturing cost is reduced, but the non-imaging light reflected from the surface cannot be effectively attenuated, affecting image quality
Solution Approach 1:
The patent applies local quality by creating rib structures only in the peripheral portion of the lens element, while keeping the effective optical portion smooth. This localized modification allows the peripheral areas to attenuate reflected light without affecting the optical performance of the central imaging area, thus resolving the contradiction between maintaining low manufacturing cost and reducing surface reflection.
Solution Approach 2:
The lens element is segmented into two distinct functional zones: the effective optical portion for imaging and the peripheral portion with rib structures for light attenuation. This segmentation allows each zone to perform its specific function independently, enabling the system to achieve both cost-effectiveness and reduced reflection simultaneously.
2Strength
If the rib structures are directly connected to the effective optical portion, then the structural strength is improved, but the light attenuation effect is reduced
Solution Approach 1:
The patent introduces a connection portion as an intermediary element between the rib structures and the effective optical portion. This connection portion acts as a mediator that provides structural support while maintaining the light attenuation function, as it is designed with a height less than the rib structures to minimize light reflection while still providing mechanical strength.
3Object-affected harmful factors
If the width of rib structures is increased, then the light attenuation effect is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent specifies precise parameter ranges for the rib structures, including width (0.01-0.05 mm) and height (0.005-0.02 mm), to optimize the balance between light attenuation effectiveness and manufacturing feasibility. By defining these specific parameter ranges, the patent enables manufacturers to achieve the desired light reflection reduction while maintaining reasonable manufacturing precision requirements.
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 rib structure design effectively attenuates non-imaging light, improving image quality and meeting the requirements of high-end optical systems in portable electronic devices by reducing surface reflection and enhancing resolution.
Implementation Method 1
The peripheral portion includes a plurality of rib structures... effectively attenuates non-imaging light... reducing surface reflection
Implementation Method 2
the rib structures are arranged around the effective optical portion... attenuates non-imaging light reflected from the surface
Data Source
AI summary
A plastic lens element includes an effective optical portion and a peripheral portion in order from an optical axis to an edge thereof. The peripheral portion includes a plurality of rib structures, wherein each of the rib structures has a strip shape in a radial direction of the optical axis, and the rib structures are arranged around the effective optical portion and indirectly connected to the effective optical portion.