Irradiation unit with pump radiation source and conversion element
US10677407B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 2019 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Jan 11, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An irradiation unit includes a pump radiation source for the emission of pump radiation; and a conversion element for the at least partial conversion of the pump radiation to a conversion radiation. During operation of the irradiation unit, the pump radiation is incident in the form of a beam from the pump radiation source on an incidence surface of the conversion element. A first portion of the pump radiation is incident on the conversion element in a central segment of the beam and a second portion of the pump radiation is incident on the conversion element in an edge segment of the beam surrounding the central segment. The conversion element is provided in such a way that a normalized degree of conversion and/or a normalized degree of scattering is lower for the second portion of the pump radiation than for the first portion of the pump radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.