Photowetting Optical Element for Rapid Dimming
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Solution Overview
Problem
Conventional photochromic lenses are slow to adjust to changes in ambient light intensity and require electronic dimming solutions that increase cost and complexity, while also affecting optical clarity.
Innovation Solution
Photowetting optical elements that utilize photoactive molecules changing hydrophobicity in response to UV light, rearranging light-absorbing molecules within a fluid to control light transmission, allowing for rapid adjustment between minimum and maximum absorption states without the need for electrical power or transparent conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional photochromic molecules are used in lenses, then light transmission can be reduced in response to light, but the adjustment speed is slower than desirable
Solution Approach 1:
The patent changes the fundamental parameter of the photochromic system by using photoactive molecules that modify surface hydrophobicity rather than relying on traditional photochromic molecules that change color. This parameter change enables rapid response to light intensity changes while maintaining effective light transmission control.
Solution Approach 2:
The patent introduces an intermediary mechanism where photoactive molecules act as mediators between UV light and the absorbing molecules. The photoactive molecules respond to UV light by changing surface hydrophobicity, which then triggers the rearrangement of absorbing molecules, creating a two-stage intermediary process that achieves rapid response.
2Ease of operation
If active dimming solutions with electronics are used in lenses, then dimming control is achieved, but cost and complexity increase
Solution Approach 1:
The patent implements a self-service system where the optical element automatically responds to ambient light intensity changes without requiring external electronic control. The photoactive molecules self-activate upon UV light exposure, automatically triggering the absorbing molecules to rearrange and control light transmission, eliminating the need for electronic dimming control systems.
Solution Approach 2:
The patent replaces the electronic mechanical system with a photochemical system. Instead of using electronic actuators, motors, or control circuits to manipulate the absorbing molecules, the system uses photoactive molecules that directly respond to UV light to induce molecular rearrangement, substituting electronic control with a light-driven chemical mechanism.
3Illumination intensity
If electronic dimming solutions are used in lenses, then active dimming is achieved, but optical properties are diminished
Solution Approach 1:
The patent extracts the electronic components and transparent conductor layers from the optical system, removing the source of optical property degradation. By eliminating these electronic elements entirely and replacing them with a purely photochemical mechanism, the system maintains superior optical clarity while achieving active dimming control.
4Speed
If photoactive molecules changing hydrophobicity are used, then rapid adjustment between absorption states is achieved, but the mechanism is novel and unproven
Solution Approach 1:
The patent applies preliminary action by pre-positioning absorbing molecules in a reservoir adjacent to the photoactive molecules. This pre-arranged configuration allows the absorbing molecules to rapidly migrate to or from the optical path immediately upon photoactivation, achieving fast response without requiring complex real-time control mechanisms.
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
Enables rapid and efficient dimming of optical elements, maintaining high transparency and reducing light absorption when necessary, while avoiding the costs and complexities associated with electronic solutions.
Implementation Method 1
photoactive molecules changing hydrophobicity in response to UV light
Implementation Method 2
Photowetting optical elements that utilize photoactive molecules changing hydrophobicity
Implementation Method 3
absorbing molecules included in a fluid that absorbs light
Data Source
AI summary
An optical element includes a first layer, a second layer, and a fluid. A first surface of the first layer is configured to change hydrophobicity in response to incoming activation light. Absorbing molecules in the fluid are repelled or attracted to the first surface in response to the hydrophobicity of the first surface.