Retroreflective Eyewear Frame Visibility
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Solution Overview
Problem
Current safety glasses with reflective features are not effective due to limited surface area and inadequate light reflection capabilities, and they can interfere with the user's vision by reflecting light into their eyes.
Innovation Solution
The integration of retroreflective elements, such as 3M™ Scotchlight™ reflective materials, into the frames of eyewear, including safety glasses and goggles, which reflect light rays back to their source, reducing glare and enhancing visibility in low-light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional reflective materials are used in eyewear frames, then light reflection capability is provided, but the reflection is insufficient and may interfere with user vision by reflecting light into their eyes
Solution Approach 1:
The patent applies retroreflective elements selectively to specific locations on the eyewear frame (temple pieces and bridge area) rather than the entire frame. This localized application ensures that reflection occurs in specific directions away from the user's eyes while maintaining visibility to others, thus improving light reflection capability without causing vision interference.
2Area of stationary object
If the surface area of the frame is increased to improve visibility, then more reflective material can be attached, but the overall structure becomes larger and less comfortable
Solution Approach 1:
The patent divides the reflective elements into separate segments attached to different parts of the frame (temple pieces and bridge). This segmentation allows the reflective function to be distributed across multiple small areas rather than requiring one large reflective surface, maintaining comfortability while achieving sufficient visibility through cumulative reflective area.
3Illumination intensity
If conventional reflective materials are used, then some light reflection is achieved, but the reflection effectiveness is limited due to material capabilities and frame surface constraints
Solution Approach 1:
The patent changes the optical parameter of the reflective material by using retroreflective elements with specific retroreflection properties rather than conventional reflective materials. This parameter change enables the material to reflect light back toward its source with higher intensity and directional control, significantly improving light reflection effectiveness within the limited frame surface area.
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 provides improved visibility in low-light conditions without interfering with the user's vision, as the retroreflective elements effectively reflect light back to the source, making the eyewear more noticeable to others while minimizing glare.
Implementation Method 1
the retroreflective element reflecting light rays of any incidence angles along a vector parallel to but opposite in direction from a light ray source
Data Source
AI summary
Reflective eyewear include at least one lens and a substantially opaque frame having a main front section with opposed side ends for supporting the at least one lens. The frame further includes at least one retroreflective element attached to the frame to be visible by others in low-light conditions.