Porous Optical Fluid Sensor for Rapid Light Transmission Switching
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Solution Overview
Problem
Existing fluid detection methods are time-consuming and unreliable, and controlling light transmission in optical devices is difficult and costly.
Innovation Solution
A fluid sensor utilizing a porous material with interconnected voids that changes refractive index upon fluid ingress or egress, enabling rapid and reproducible fluid detection and controlling light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluid detection methods are used, then fluid presence can be detected, but the detection process is time-consuming and unreliable
Solution Approach 1:
The patent replaces conventional mechanical or chemical fluid detection methods with an optical system. A porous optical element changes its optical properties (from opaque to transparent) when fluid enters its pores, allowing rapid and reliable detection through optical means rather than mechanical or chemical processes.
Solution Approach 2:
The patent utilizes optical property changes in the porous element - specifically the transition from opaque to transparent state - as a visual indicator of fluid presence. This optical appearance change provides immediate, reliable detection without time-consuming processing.
2Ease of operation
If light transmission control is implemented in optical devices, then selective light control is achieved, but the cost and complexity increase significantly
Solution Approach 1:
The patent employs a porous optical element where the porous structure itself provides the light transmission control mechanism. When fluid enters the pores, it changes the refractive index and optical density, naturally controlling light transmission without requiring complex mechanical shutters or additional optical components.
Solution Approach 2:
The porous optical element serves multiple functions simultaneously: it acts as both the fluid detection medium and the light transmission control element. This multi-functionality eliminates the need for separate control mechanisms, reducing overall device complexity while maintaining ease of operation.
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 porous material provides a rapid visual indication of fluid presence or absence and controls light transmission, enhancing the reliability and efficiency of fluid detection and optical device operation.
Implementation Method 1
Fluid ingress into or egress from the voids causes a change in the refractive index of the porous material, and the optical effect of this refractive index change can be utilized for fluid sensing
Implementation Method 2
the porous material can be selected from materials with a very low refractive index that are optically diffusive when the voids are substantially free of fluid (dry)
Data Source
AI summary
An optical element includes a porous layer with a network of a plurality of interconnected voids. The porous layer is optically diffusive to at least one wavelength of light when the network of interconnected voids is substantially free of fluid. The porous layer of the optical element undergoes a detectable optical change upon fluid ingress into the network or egress from the network of interconnected voids.