Infrared Optical Window Grooves Reduce Signal Absorption
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Solution Overview
Problem
Existing infrared absorption spectrum technologies for detecting substance components, such as in electroplating solutions, face challenges due to partial absorption of infrared signals by the infrared optical window, leading to signal attenuation and reduced detection accuracy.
Innovation Solution
A substance component detection apparatus with an infrared optical window featuring a structure with grooves on its second surface, reducing the optical path length and absorption of infrared signals, allowing for wider band detection and enhanced sensitivity through a surface-enhanced infrared effect thin film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an infrared optical window is used to protect the infrared light source and detector, then the reliability of the detection system is improved, but the infrared signal is partially absorbed by the window material causing signal attenuation and reduced measurement precision
Solution Approach 1:
The patent extracts the harmful function (infrared absorption) from the optical window by creating a hollow cavity structure filled with vacuum or inert gas, removing the absorbing window material from the infrared signal path while maintaining the protective enclosure function
Solution Approach 2:
The patent uses a hollow cavity structure that can be filled with vacuum or inert gas, creating a non-absorbing medium environment that allows infrared signals to pass through without attenuation while still providing protection
2Measurement precision
If the optical path length in the infrared optical window is increased to improve detection sensitivity, then the detection limit is reduced, but the absorption of infrared light by the window material is increased causing signal loss
Solution Approach 1:
The patent removes the absorbing window material from the optical path by using a hollow cavity design, allowing the infrared signal to travel through vacuum or inert gas where no absorption occurs, thus extending the effective optical path without energy loss
Solution Approach 2:
The patent fills the hollow cavity with vacuum or inert gas that does not absorb infrared radiation, creating an environment where the infrared signal can propagate over longer distances without attenuation, thereby improving detection sensitivity
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 apparatus achieves improved wideband detection sensitivity by reducing signal absorption and extending the detection limit for substance components, enabling accurate detection of components with low concentrations and those without electrochemical activity.
Implementation Method 1
when passing through the infrared optical window, the infrared signal is partially absorbed by the material of the infrared optical window, and consequently the infrared signal is attenuated
Implementation Method 2
improving wideband detection sensitivity based on a surface-enhanced infrared effect thin film
Data Source
AI summary
A substance component detection apparatus and a method are provided to reduce absorption of an infrared signal by a window medium, thereby obtaining abundant fingerprint region signals. The apparatus includes: a sample pool, an infrared optical window, an infrared light source, and a detector. The infrared optical window has a first surface that faces an inner side of the sample pool and that is configured to be in contact with a to-be-detected substance, and a second surface exposed on an outer side of the sample pool. A protruding portion is formed between two adjacent grooves on the second surface, and any protruding portion has an incident surface and an emergent surface. An infrared signal emitted by the infrared light source is irradiated on the incident surface. The detector determines a component of the to-be-detected substance and/or content of the component.