Getter Portion in Laser Excitation Light Source for Gas Adsorption
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Solution Overview
Problem
Laser excitation light sources face defects due to impure gases within their internal spaces, leading to reduced lifespan, and existing solutions fail to effectively suppress these defects.
Innovation Solution
A light emitting sealed body with a getter portion containing a getter material, disposed within the irradiation region of laser light, which is heated and activated to adsorb impure gases, thereby extending the lifespan by preventing defect occurrence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laser excitation light source is operated without a getter portion, then the device structure remains simple, but impure gas accumulates in the internal space causing defects and reducing lifespan
Solution Approach 1:
A getter portion is installed in advance within the housing to adsorb impure gas before it can accumulate and cause defects. The getter material is positioned in the irradiation region of laser light so that during normal operation, the laser light automatically heats and activates the getter material, enabling it to adsorb impure gas without requiring additional active control systems.
Solution Approach 2:
The getter material utilizes the laser light already present in the system for excitation purposes as a free heat source to activate itself. The laser light that passes through the light-emitting gas also irradiates the getter material, providing the necessary thermal energy for gas adsorption without requiring separate heating mechanisms or additional energy input.
2Temperature
If the getter material is directly heated by laser light, then activation is efficient, but the getter material may be damaged due to excessive heating
Solution Approach 1:
An intermediate member with high reflectivity and high melting point is introduced between the laser light source and the getter material. This intermediary reflects a portion of the laser light away from the getter material while allowing sufficient light to pass through to activate the getter. The intermediate member protects the getter material from excessive heating and potential damage while maintaining effective gas adsorption capability.
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 getter material effectively adsorbs impure gases, suppressing defects and extending the lifespan of the light emitting sealed body by maintaining a clean internal environment.
Implementation Method 1
the getter material can be heated and activated by irradiation with the first light, and impure gas existing in the internal space can be adsorbed by the activated getter material
Implementation Method 2
the getter material can be heated and activated by irradiation with the first light
Implementation Method 3
a plasma generated in light-emitting gas is maintained by being irradiated with laser light, and light from the plasma is output as output light
Data Source
AI summary
A light emitting sealed body includes: a housing containing light-emitting gas in an internal space; a first window portion which is provided to the housing and on which first light that is laser light for maintaining a plasma generated in the light-emitting gas is incident; a second window portion provided to the housing and from which second light that is light from the plasma is emitted; and a getter portion including a getter material and disposed in an irradiation region of the first light inside the housing.