Light Source Device Internal Focusing for Tube Wall Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source devices face challenges in efficiently lighting a light emission tube with a laser beam while preventing devitrification or breaking due to high energy density beams impinging on the tube wall, especially when using focusing components with large diameters that are difficult to arrange close to the tube.
Innovation Solution
The light source device incorporates a focusing means within the light emission tube, such as a meniscus or plano-convex structure, where the tube wall functions as a focusing element, allowing for a large solid angle focus without external large-diameter components, thus preventing beam-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a focusing component with large diameter is arranged close to the light emission tube to increase the solid angle of the beam, then the lighting efficiency is improved, but the tube wall is heated and damaged by the high energy density beam
Solution Approach 1:
The focusing component is nested inside the light emission tube, placing the focusing element within the protected space of the tube rather than outside. This allows the beam to be focused to a large solid angle while the focusing component does not expose the tube wall to concentrated high energy density beams, as the focusing occurs internally away from the tube wall surface
Solution Approach 2:
The light emission tube itself acts as an intermediary structure that contains the focusing component. By integrating the focusing element within the tube's internal space, the system mediates between the need for high solid angle focusing and the need to protect the tube wall from beam-induced damage
2Temperature
If the solid angle of the beam is increased to improve plasma formation, then the energy density distribution becomes problematic and tube damage occurs
Solution Approach 1:
The focusing component is positioned inside the light emission tube, allowing the beam to achieve high solid angle convergence and high temperature plasma formation in the tube's interior space without the focusing component or concentrated beam directly contacting and heating the tube wall
Solution Approach 2:
The internal focusing arrangement allows different regions of the tube to have different functional qualities: the central region achieves high temperature plasma formation while the wall region remains protected from excessive heating, creating localized functional zones within the tube
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 enables efficient lighting with a high-temperature plasma state formation, prevents devitrification and breaking, and allows for stable continuous operation by focusing beams internally, maintaining a high-temperature plasma state and preventing heating of the tube wall.
Implementation Method 1
The high-temperature plasma state arising in the interior of the light emission tube is generated by an energy density of the beam amounting to at least the threshold value for an ionization of the light emitting element
Implementation Method 2
it is necessary to increase the energy density of the beam and to bring it to at least the threshold value for an ionization of the light emitting element by means of focusing the beam by a focusing component of an optical system
Data Source
Figure 1
Figure 2~3
Figure 4(a)~5(b)
AI summary
A light source device provided with a light emission tube (1) in which a light emitting element is enclosed and at least one laser oscillator part (2) for radiating a laser beam towards said light emission tube, for focusing a beam within a light emission tube with a large solid angle and for preventing that the beam with a high energy density impinges upon the wall of the light emission tube, the light emission tube has a tube wall, part of which is made to function as a focusing means (32), or the light emission tube has a focusing means at the inner surface thereof.