Lens Rib Light Blocking Region for Flare Reduction
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Solution Overview
Problem
Internal reflections from lens rib surfaces can cause flares or ghosting in images captured under strong or intense light, particularly when light is incident at specific angles, leading to inaccurate image formation.
Innovation Solution
A lens device with a rib portion that includes a light transmission region and a light blocking region, where the light blocking region is disposed inside the rib portion and contains a non-polar colorant, reducing light transmissivity and minimizing internal reflections by extending from one or both surfaces of the rib portion in the optical axis direction, and using a cyclic olefin compound for the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rib portion is added to the lens for structural support, then mechanical strength is improved, but internal reflection increases causing flares or ghosting
Solution Approach 1:
The rib portion is designed with spatially varying optical properties: the light transmission region allows light passage while the light blocking region (with non-polar colorant) prevents internal reflection. This local differentiation resolves the contradiction by making different parts of the rib serve different functions - structural support versus reflection prevention.
Solution Approach 2:
A non-polar colorant is introduced into the light blocking region of the rib portion, creating a region with different optical absorption characteristics. This coloration change enables the rib to block specific wavelengths of light that would otherwise cause internal reflection and flares, while maintaining structural integrity.
2Object-generated harmful factors
If the entire rib portion blocks light to prevent internal reflection, then internal reflection is reduced, but light transmission is blocked causing image darkening
Solution Approach 1:
The rib portion is divided into distinct functional regions: a light transmission region that allows light to pass through to maintain image brightness, and a light blocking region containing non-polar colorant that prevents internal reflection. This spatial differentiation resolves the contradiction by allowing simultaneous light transmission and reflection prevention in different areas of the same rib 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 solution effectively reduces light transmissivity and prevents flares or ghosting by strategically placing a light blocking region within the rib portion, enhancing image accuracy and quality under various lighting conditions.
Implementation Method 1
the light blocking region is disposed inside of the rib portion and includes a non-polar colorant, reducing light transmissivity
Data Source
AI summary
A lens device includes a lens including an optical unit, and a rib portion extending outwardly of the optical unit in a radial direction, where the rib portion includes a light transmission region and a light blocking region, and where the light blocking region is disposed inside of the rib portion. The light blocking region may include a non-polar colorant. The lens may include a cyclic olefin compound. The lens device may include one or more lenses with rib portions with light transmission regions and light blocking regions, and may be a lens assembly with the one or more lenses.