| 摘要 |
The present invention relates to an irradiation device (50) comprising a pump radiation source (51) for emitting pump radiation (2), a conversion element (3) for converting the pump radiation (2) into conversion radiation (16, 18) of longer wavelength, and a reflection surface (11), which is reflective to the conversion radiation (16, 18) and on which backscattered conversion radiation (16) emitted at a backscatter emission surface (8) and thus counter to a useful direction is incident and is reflected therefrom back to the conversion element (3); said reflection surface (11) is concavely curved relative to the conversion element (3) in such a way that at least the backscattered conversion radiation (16a) emitted divergently from a surface centroid (15) of the backscatter emission surface (8) is incident on the reflection surface (11) at an angle of incidence of at most 20° in terms of absolute value. |
