Lens Rib Light-Shielding Region Design for Flare Reduction
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Solution Overview
Problem
Internal reflections from rib surfaces in camera lenses can cause flares and ghosting, especially when fluorescent or strong lights are incident at certain angles.
Innovation Solution
A lens design featuring an optical portion and a rib portion with a light transmitting region and a light-shielding region, where the light-shielding region includes an ester-based compound, a hydrocarbon-based compound, and a non-polar dye, which reduces light transmittance and prevents flare or ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a lens includes only an optical portion without rib structures, then internal reflection and flare are reduced, but the lens cannot be properly mounted or secured
Solution Approach 1:
The lens is divided into two distinct functional parts: an optical portion for light transmission and a rib portion for mounting and securing. This segmentation allows each part to be optimized for its specific function while working together as a complete lens assembly.
Solution Approach 2:
The lens structure is differentiated into regions with different properties: the optical portion is designed for optimal light transmission, while the rib portion is designed for mechanical attachment. This local differentiation of structure and function resolves the contradiction between optical performance and mounting capability.
2Ease of manufacture
If the entire lens is made from a single material, then manufacturing is simple, but light-shielding functionality cannot be integrated
Solution Approach 1:
The lens combines different materials with complementary properties: a transparent optical material for the optical portion and a light-shielding material for the rib portion. This composite structure integrates both optical transmission and light-shielding functions in a single component.
Solution Approach 2:
The optical and light-shielding functions are merged into a single integrated lens structure rather than separate components. The light-shielding rib portion is combined with the optical portion to form one unified lens assembly that performs multiple functions simultaneously.
3Object-affected harmful factors
If light-shielding regions are added to the lens, then flare and ghosting are reduced, but the lens structure becomes more complex
Solution Approach 1:
The lens is segmented into distinct functional zones: the optical portion for light transmission and the rib portion with light-shielding regions for preventing flare. This segmentation organizes the complexity into manageable functional sections rather than a uniformly complex structure.
Solution Approach 2:
Light-shielding properties are applied locally only to the rib portion where they are needed to prevent internal reflection, while the optical portion maintains full transparency. This localized application of light-shielding material minimizes overall structural complexity while achieving the desired flare reduction.
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 proposed lens design effectively blocks unnecessary light, reducing flare and ghosting issues while maintaining optical performance, and can be produced using polycarbonate-based or polyolefin-based compounds.
Implementation Method 1
the light-shielding region includes an ester-based compound and a hydrocarbon-based compound... which reduces light transmittance and prevents flare or ghosting
Data Source
AI summary
A lens includes an optical portion; and a rib portion extending to an external side of the optical portion in a radial direction and including a light transmitting region and a light-shielding region, wherein the light-shielding region includes an ester-based compound and a hydrocarbon-based compound, and wherein the hydrocarbon-based compound includes a saturated hydrocarbon compound.