Gas Sensor Wavelength Limiter Miniaturization
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Solution Overview
Problem
Existing gas sensors face challenges in miniaturization, leading to difficulties in optical path design and issues with filter interference and light loss.
Innovation Solution
A gas sensor design that incorporates wavelength limiters composed of layers with different refractive indices, connected directly to the light source or sensors, to limit wavelengths reaching the sensors, thereby reducing filter size and facilitating optical path design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the filter is decreased to miniaturize the gas sensor, then the device size is reduced, but optical path design becomes difficult and filter interference occurs
Solution Approach 1:
The patent combines the wavelength limiting function with the filter structure by integrating a wavelength limiter directly onto the filter substrate. This merging of functions allows the filter to simultaneously perform wavelength selection and optical path management, resolving the contradiction between miniaturization and optical path design complexity
Solution Approach 2:
The patent introduces a wavelength limiter as an intermediary component between the light source and the filter. This wavelength limiter pre-selects wavelengths before they reach the filter, reducing the burden on the filter and simplifying the overall optical path design while enabling smaller filter dimensions
2Volume of moving object
If the size of the filter is decreased, then the device is miniaturized, but light loss increases
Solution Approach 1:
The patent applies preliminary wavelength limiting before light reaches the filter. By placing a wavelength limiter in the optical path prior to the filter, the system pre-selects the appropriate wavelengths, allowing the filter to be smaller while maintaining efficient light transmission and reducing overall light loss
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 proposed solution allows for the miniaturization of gas sensors, improves optical path design, and reduces filter interference and light loss, enhancing the precision and reliability of gas concentration detection.
Implementation Method 1
the first wavelength limiter is composed of layers of materials having different refractive indices and is part of the light source or a substrate on which the light source is installed
Data Source
AI summary
A gas sensor is provided in which size of a filter can be decreased and optical path design is facilitated. The gas sensor includes: a light source (20) that has an active layer; a first sensor (32) disposed so that light emitted from the light source is incident thereon, configured to detect a state of a space; a second sensor (31) disposed so that light emitted from the light source is incident thereon, used to compensate for temperature variation or elapsed time variation of the first sensor; a first wavelength limiter configured to limit wavelengths of light emitted from the active layer that reach the first sensor and the second sensor, connected to the light source without the space intervening; and a second wavelength limiter configured to limit wavelengths of light emitted from the active layer that reach the second sensor, connected to the second sensor without the space intervening.