Stereoscopic Eyewear Rim Geometry for Stray Light Management
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Solution Overview
Problem
Current stereoscopic eyewear designs fail to effectively minimize stray light, which compromises the quality of the 3D viewing experience by allowing unwanted reflections and scatter to enter the eye, particularly from the frame and lens materials, leading to reduced image brightness and increased ghost images at extreme viewing angles.
Innovation Solution
The eyewear frame is designed with optimized geometry and surface treatments to minimize stray light, including inclined rim sections, anti-reflective coatings, and textured surfaces that redirect or absorb light, ensuring minimal scatter and reflections within the field of view, thereby enhancing the 3D experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional stereoscopic eyewear designs are used, then the basic 3D viewing function is achieved, but stray light enters the eye causing reduced image brightness and increased ghost images
Solution Approach 1:
The patent extracts and removes the harmful stray light paths by introducing light-blocking structures (baffles, shields, and optimized frame geometries) that selectively block stray light while allowing desired image light to pass through. This separates the harmful light paths from the useful optical paths.
Solution Approach 2:
The patent applies different surface treatments and geometries to different parts of the eyewear. Specifically, the frame portions near the lenses have anti-reflective coatings and textured surfaces to reduce local stray light generation, while maintaining optical clarity in the lens areas.
2Ease of manufacture
If frame materials and lens materials are used without special treatment, then manufacturing is simple, but reflections and scatter occur compromising image quality
Solution Approach 1:
The patent changes the surface parameters of the frame and lens materials by applying anti-reflective coatings and textured surface treatments. These modifications alter the optical properties (reflectivity, scattering) of the materials without fundamentally changing the manufacturing process, thus maintaining ease of manufacture while improving optical quality.
3Adaptability or versatility
If extreme viewing angles are accommodated, then viewing versatility is improved, but stray light management becomes more difficult leading to ghost images
Solution Approach 1:
The patent introduces asymmetric light-blocking structures and optimized frame geometries that are specifically designed to address stray light paths at extreme viewing angles. The asymmetric design allows light to pass through at desired angles while blocking stray light paths that become prominent at extreme angles, thus maintaining viewing versatility while reducing ghost images.
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 significantly reduces stray light, improving image quality and contrast by minimizing unwanted reflections and scatter, ensuring a more immersive and distraction-free 3D experience across various viewing angles and environments.
Implementation Method 1
anti-reflective coatings
Implementation Method 2
anti-reflective coatings...minimize stray light
Implementation Method 3
textured surfaces that redirect or absorb light
Implementation Method 4
textured surfaces that redirect or absorb light
Data Source
AI summary
Disclosed embodiments relate to eyewear configured to reduce stray light. An exemplary embodiment of the eyewear accounts for various design factors, including the cross sectional profile of the rim, the micro topography of the rim surface, the reflectivity, the theater or room geometry, proximity of the eye to the lens, lens size, and the screen gain. An exemplary eyewear includes lenses connected to the rims of a frame, and a path may be defined through a maximum height of the outer flange portion of a rim and a maximum height of the inner flange portion of the rim section. The path may be inclined at an angle relative to an angle α relative to a longitudinal axis defined by the lenses.