Spectroscopic Sensor Cavity Layer Buffering External Forces
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Solution Overview
Problem
Conventional spectroscopic sensors with delicate resin-based cavity layers are prone to deterioration under external forces, affecting the interference filter unit's characteristics.
Innovation Solution
A spectroscopic sensor design featuring a cavity layer with an annular surrounding region and connecting region to buffer external forces, preventing damage to the filter region, and using silicon oxide films for the cavity and coupling layers to enhance stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a delicate resin-based cavity layer is used in the interference filter unit, then the filter can achieve the required optical characteristics, but the cavity layer is easily damaged by external forces
Solution Approach 1:
The patent introduces a buffer layer between the delicate cavity layer and the external environment. This buffer layer is specifically designed to absorb and distribute external forces before they can reach the cavity layer, providing beforehand cushioning that prevents damage to the fragile optical components while maintaining the required optical characteristics
2Manufacturing precision
If the cavity layer is made thinner to improve optical performance, then the interference filter characteristics are enhanced, but the layer becomes more vulnerable to external forces
Solution Approach 1:
The patent introduces a buffer layer as an intermediary between the thin cavity layer and external forces. This intermediary layer allows the cavity layer to maintain its thin design for optimal optical performance while the buffer layer absorbs and distributes mechanical stresses, protecting the thin cavity layer from damage
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 design provides a highly reliable spectroscopic sensor that is resistant to external forces and environmental changes, maintaining light transmittance and refractive index stability.
Implementation Method 1
an interference filter unit, having a cavity layer and first and second mirror layers opposing each other through the cavity layer, for selectively transmitting therethrough light in a predetermined wavelength range according to an incident position thereof
Data Source
AI summary
A spectroscopic sensor 1 comprises an interference filter unit 20, having a cavity layer 21 and mirror layers 22, 23 opposing each other through the layer 21, for selectively transmitting therethrough light in a predetermined wavelength range according to an incident position thereof; a light-transmitting substrate 3, arranged on the layer 22 side, for transmitting therethrough light incident on the unit 20; and a light-detecting substrate 4, arranged on the layer 23 side, for detecting the light transmitted through the unit 20. The layer 21 has a filter region 24 held between the layers 22, 23; an annular surrounding region 25 surrounding the region 24 with a predetermined distance therefrom; and an annular connecting region 26 connecting an end part 24e on the substrate 4 side of the region 24 and an end part 25e on the substrate 4 side of the region 25 to each other.