Meta-Lens Infrared Gas Detection for Durable Dot-Array Imaging
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Solution Overview
Problem
Conventional gas detection systems using infrared cameras face durability issues due to movable parts and are susceptible to ambient temperature, wind, and other gases, affecting detection sensitivity.
Innovation Solution
A gas detection system utilizing a meta-lens to condense infrared light into a dot array, combined with a CPU to generate an emphasis image by integrating active and passive image information, enhancing durability and reducing environmental influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a galvanometer mirror is used to scan the laser point light source two-dimensionally, then gas detection is achieved, but durability deteriorates due to the presence of movable parts
Solution Approach 1:
The patent replaces the mechanical galvanometer mirror scanning system with a fixed optical system that uses a diffuser plate to create a two-dimensional laser light source. This eliminates movable parts while achieving the same gas detection function through optical diffusion and fixed imaging optics.
Solution Approach 2:
The patent divides the laser beam into multiple scattered light paths using a diffuser plate, creating a two-dimensional array of light points. This segmentation allows the system to detect gas across a wider field of view without requiring mechanical scanning movements.
2Measurement precision
If passive type gas cloud imaging is used, then gas detection is achieved, but detection sensitivity deteriorates due to susceptibility to ambient temperature, wind, or other gases
Solution Approach 1:
The patent uses a pulse laser that emits light in periodic pulses rather than continuously. This periodic illumination allows the system to capture gas absorption information during specific time windows, reducing the influence of environmental factors that change continuously.
Solution Approach 2:
The patent performs preliminary action by having the pulse laser illuminate the target area before the infrared camera captures the image. This active illumination ensures that the gas cloud is lit with known intensity parameters, allowing for more accurate absorption measurement independent of ambient lighting conditions.
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 system achieves high durability and sensitive gas detection less affected by the surrounding environment, with a compact design and improved detection sensitivity.
Implementation Method 1
a light source configured to irradiate the imaging target region with infrared light including an absorption wavelength of the gas
Implementation Method 2
an optical system configured to condense infrared light from the light source on a light receiving surface of the infrared image sensor
Implementation Method 3
irradiated with infrared light including an absorption wavelength of the gas
Data Source
AI summary
A gas detection device includes a gas detection system configured to image while irradiating, in a dot array shape, infrared light having an absorption wavelength of a gas from a light source, and generates, with a CPU, information on an emphasis image of an image of the gas from image information when irradiating and image information when not irradiating, and a display unit.