Irradiation Unit Carrier Inner Wall Reflects Pump Radiation
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Solution Overview
Problem
Existing irradiation units for producing high luminance, such as those used in projection or cinematographic applications, require complex optics or lens systems to concentrate pump radiation onto the conversion element, resulting in a bulky and non-compact design.
Innovation Solution
An irradiation unit where the conversion element is mounted on a carrier with an obliquely inclined inner wall surface that reflects and shapes the pump radiation onto the incidence surface, eliminating the need for external lenses and allowing for a miniaturized, spatially compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If complex optics or lens systems are used to concentrate pump radiation onto the conversion element, then high luminance is achieved, but the device becomes bulky and non-compact
Solution Approach 1:
The carrier structure is merged with the optical function by designing its inner wall surface with specific geometric features (inclined surfaces, reflectors) that concentrate pump radiation onto the conversion element. This combines the mechanical support function with the optical concentration function, eliminating the need for separate lens systems and achieving compact device size while maintaining high luminance
Solution Approach 2:
The carrier is designed to perform multiple functions simultaneously: mechanical support for the conversion element, structural framework, and optical element for concentrating pump radiation. The inner wall surface of the carrier acts as both a structural component and an optical concentrator, reducing the overall device complexity and size
2Manufacturing precision
If complex optics or lens systems are used to shape the pump radiation beam, then proper illumination of the conversion element is achieved, but the device complexity increases
Solution Approach 1:
The beam shaping function is merged into the carrier structure through its inner wall surface geometry. The inclined surfaces and integrated reflectors perform beam shaping directly within the carrier, eliminating the need for separate optical elements and reducing overall device complexity while maintaining precise illumination of the conversion element
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 simplifies the structure, reduces size, and achieves efficient beam shaping without external lenses, enabling a more compact and efficient production of high luminance light sources.
Implementation Method 1
the inner wall surface is used in order to reflect a marginal part of the ray beam comprising the pump radiation onto the incidence surface
Implementation Method 2
a conversion element for the at least partial conversion thereof into conversion radiation... The pump radiation may for example be blue light, and then, in the case of so-called partial conversion, a mixture of partially unconverted blue light together with yellow light as conversion radiation may result in white light
Data Source
AI summary
An irradiation unit is disclosed that includes a pump radiation source for emitting pump radiation in the form of a beam, a conversion element for at least partially converting the pump radiation into conversion radiation, and a support on which the conversion element is situated. The support accommodates a through-hole through which the beam including the pump radiation is incident on an incident surface of the conversion element, the though-hole being laterally delimited by an inner wall face of the support, at least one portion of the face tapering in the direction of the incident surface. During operation, the pump radiation conducted in the beam is at least intermittently at least in part, incident on the inner wall face of the support and is reflected thereby onto the incident surface.