Flash Lamp Triggering Consistency via Laser Evaporated Electrode Deposit
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Solution Overview
Problem
The ignition triggering properties of arc and flash lamps are inconsistent, and existing methods like sputtering electrode material onto the envelope surface to lower ignition voltage can reduce lamp lifetime and require complex, lengthy gas filling processes.
Innovation Solution
A conductive deposit is formed adjacent the electrode tip by locally heating and evaporating electrode material, using a laser or other heat sources, to reduce the triggering voltage and improve consistency, which can be done during lamp manufacture before gas filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sputtering electrode material onto the envelope surface is used to lower ignition voltage, then triggering voltage is reduced, but lamp lifetime is reduced due to light transmission blocking and envelope damage
Solution Approach 1:
A conductive layer formed from evaporated electrode material serves as an intermediary between the electrode and the envelope. This layer facilitates easier ionization and triggering while being deposited in a controlled manner that prevents the harmful effects of sputtering, thus maintaining lamp lifetime while improving triggering consistency
Solution Approach 2:
The patent replaces the mechanical sputtering process (which uses plasma to erode electrode material) with a controlled evaporation process. This substitution allows for precise deposition of conductive material without the damaging effects of sputtering, resolving the contradiction between improved triggering and maintained lamp lifetime
2Reliability
If sputtering process is used to form conductive path, then ignition voltage is lowered, but manufacturing complexity increases due to lengthy and unpredictable gas filling process
Solution Approach 1:
The conductive layer is formed on the electrode during the manufacturing process before gas filling. This preliminary action eliminates the need for complex post-manufacturing adjustments and simplifies the overall manufacturing process while ensuring consistent triggering voltage
Solution Approach 2:
The patent changes the deposition method from sputtering to evaporation, and performs it under different conditions (before gas filling). This parameter change simplifies the manufacturing process by eliminating the need for complex gas filling procedures and makes the process more predictable and controllable
3Reliability
If sputtering is performed during or prior to gas filling, then conductive path is formed, but manufacturing time increases due to lengthy process requirements
Solution Approach 1:
The formation of the conductive layer is merged with the electrode manufacturing process itself. By depositing the conductive material directly onto the electrode during its fabrication, the patent eliminates separate sputtering or evaporation steps, thereby reducing total manufacturing time while maintaining triggering consistency
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 solution significantly reduces and stabilizes the triggering voltage, enhancing the reliability and longevity of the flash lamp by avoiding material sputtering-related issues and simplifying the gas filling process.
Implementation Method 1
locally heating and evaporating electrode material
Implementation Method 2
using a laser or other heat sources
Implementation Method 3
a conductive deposit is formed adjacent the electrode tip by locally heating and evaporating electrode material
Data Source
Figure 1~2
AI summary
A flash lamp is disclosed comprising an insulative envelope containing a gas and housing a pair of arcing electrodes and characterised by an instance of isolated conductive material being formed at a predetermined location on the inside of the envelope adjacent an electrode. Further disclosed is a corresponding method of manufacturing a flash lamp and apparatus for the same.