Laser-Sealed Beam Lamp With Flat Window for Precise Plasma Ignition
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Solution Overview
Problem
High-intensity arc lamps face challenges with beam distortion due to curved lamp surfaces, leading to an unclear focal area, which increases cost and complexity when attempting to correct with optics.
Innovation Solution
A sealed high-intensity illumination device operates without ignition electrodes, utilizing a sealed chamber with a flat ingress window and a reflective interior surface to minimize beam distortion, and employs a laser to ignite and sustain the plasma, with optional reflectors to control the beam path and energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a curved lamp surface is used to contain the ionizable medium, then the lamp can be compact and sealed, but beam distortion occurs leading to an unclear focal area
Solution Approach 1:
The lamp is divided into two distinct surface types: a curved containment surface for compact sealing and a flat local surface (window) for precise beam transmission. This segmentation allows each surface to fulfill its specific function without compromise.
Solution Approach 2:
The lamp surface is made non-uniform: most of the surface is curved for compact containment, but a specific local region (the window area) is made flat to minimize beam distortion. This local quality change resolves the contradiction by applying different surface properties where needed.
2Manufacturing precision
If optics are added to correct beam distortion from curved surface, then focal precision can be improved, but device complexity and cost increase
Solution Approach 1:
The problematic curved surface is extracted from the beam transmission path by creating a separate flat window region. This removes the source of distortion without requiring additional corrective optics, thereby reducing device complexity while maintaining focal precision.
3Reliability
If ignition electrodes are used to start the plasma, then plasma ignition is reliable, but device complexity and potential failure points increase
Solution Approach 1:
The mechanical/electrical ignition electrode system is replaced with an optical ignition system using a laser. The laser focuses energy to ignite the plasma without requiring physical electrodes inside the chamber, reducing complexity and potential failure points while maintaining reliable ignition.
4Manufacturing precision
If a flat ingress window is used, then beam distortion is minimized and focal precision is improved, but manufacturing constraints and thermal management challenges arise
Solution Approach 1:
The window is segmented from the main curved lamp body, allowing it to be manufactured and sealed independently. This makes integration easier while maintaining the flat surface needed for precise beam transmission.
Solution Approach 2:
The flat window acts as an intermediary element between the external laser beam and the internal plasma chamber. It provides a stable, distortion-free interface while being thermally and mechanically coupled to the curved containment structure through the sealing mechanism.
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
This configuration provides a more precise and focused beam with reduced complexity and cost, as the flat window minimizes light distortion and the laser ensures stable plasma generation, enhancing the lamp's operational efficiency and longevity.
Implementation Method 1
configured to focus the laser beam to a focal region within the chamber
Implementation Method 2
plasma of the ionizable medium within the chamber at the focal region
Implementation Method 3
The interior of the chamber has a reflective interior surface configured to reflect light toward the egress window
Implementation Method 4
A flat ingress window is disposed within a wall of the interior surface. The substantially flat ingress window conveys the ingress laser light into the chamber with minimal distortion or loss
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~4B
AI summary
A sealed high intensity illumination device configured to receive a laser beam from a laser light source comprising a sealed chamber configured to contain an ionizable medium, the chamber further comprising a plasma sustaining region; a plasma ignition region; a high intensity light egress window configured to emit high intensity light from the chamber; an integral reflective chamber interior surface configured to reflect high intensity light from the plasma sustaining region to the egress window; and a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber; and means for adjusting a pressure level within the sealed chamber, wherein a path of the laser beam from the laser light source through the ingress window to a focal region within the chamber is direct.