LARP Module Positioning Element for Phosphor Alignment
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Solution Overview
Problem
Conventional LARP modules face challenges in accurately positioning downstream optical elements due to manufacturing tolerances and deviations in the excitation radiation spot position on the phosphor, requiring complex corrections and mechanical references.
Innovation Solution
A module with a positioning element that adjusts the housing to align the excitation radiation spot with the phosphor, allowing for easy positioning of downstream components without active alignment, using a set of positioning elements with varying eccentricities to compensate for deviations within specific tolerance ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional LARP module manufacturing is used, then production can proceed with standard tolerances, but the excitation radiation spot position deviates from the nominal position on the phosphor, requiring complex corrections for downstream optical elements
Solution Approach 1:
A positioning element is introduced as an intermediary component between the module housing and downstream optical elements. This positioning element includes a receptacle that receives the housing and features an abutment area for abutting against the phosphor at the actual laser spot position, thereby mediating the connection and enabling accurate positioning without complex active alignment systems
Solution Approach 2:
The positioning element is pre-configured with an abutment area positioned at a specific distance from the receptacle, corresponding to the expected actual position of the laser spot on the phosphor. This preliminary positioning configuration compensates for manufacturing tolerances and spot position deviations before the downstream optical elements are assembled, eliminating the need for complex corrections during assembly
2Manufacturing precision
If the holding section is made larger to accommodate positioning adjustments, then the laser spot can be positioned more accurately on the phosphor, but the overall module size increases
Solution Approach 1:
Instead of increasing the holding section area in the transverse plane, the solution extends the positioning function into the longitudinal dimension by adding a receptacle that receives the housing and an abutment area that contacts the phosphor. This dimensional transition allows accurate positioning without increasing the transverse footprint of the module
3Ease of operation
If downstream optical elements are positioned based on the nominal laser spot position, then assembly is simplified, but manufacturing tolerances cause misalignment between the actual laser spot and the optical elements
Solution Approach 1:
The solution replaces complex active mechanical alignment systems with a passive mechanical positioning approach. The positioning element provides fixed geometric relationships through the receptacle and abutment area, eliminating the need for active alignment mechanisms while ensuring that downstream optical elements are correctly positioned relative to the actual laser spot position
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
Facilitates simple and accurate positioning of downstream components, eliminating the need for complex corrections and mechanical references, ensuring precise alignment of the laser spot on the phosphor and enhancing the assembly process.
Implementation Method 1
The excitation radiation is at least partly absorbed by the phosphor and at least partly converted into conversion radiation or into conversion light, the wavelengths of which and hence the spectral properties and/or color of which are determined by the conversion properties of the phosphor. In the case of the down conversion, the excitation radiation of the radiation source is converted by the irradiated phosphor into conversion radiation with longer wavelengths than the excitation radiation.
Data Source
AI summary
A module may include a housing in which a radiation source is arranged, where the radiation source is configured to emit an excitation radiation by virtue of a conversion element disposed downstream of the radiation source, and the conversion element is configured to convert, at least in part, the excitation radiation. The conversion element may be fastened to a holding section of the housing. The holding section may be encompassed by a positioning element. A receptacle of a component may be adapted to the positioning element. The component may be downstream of the module. The housing may be positionable in the receptacle in order to position the component with respect to an impingement region of the excitation radiation on the conversion element.