Lighting Device Comprising Pump Light Source and at Least Two Phosphor Wheels

摘要

A lighting device comprising a pump light source and two or more phosphor wheels arranged one directly behind another. As a result, firstly, the heat loss can be dissipated via the two phosphor wheels. Secondly, only a single common collecting optical unit is required for collecting the conversion light emitted by the first phosphor wheel and the second phosphor wheel.

主权项

1. A lighting device, comprising:
a. a pump light source; b. a first phosphor wheel,
i. wherein the first phosphor wheel has at least one first phosphor region which can be irradiated with the pump light of the pump light source and re-emits said pump light at least partly in a wavelength-converted fashion, andii. wherein the first phosphor wheel has at least one first transmitted-light region; c. a second phosphor wheel,
i. wherein the second phosphor wheel has at least one second phosphor region which can be irradiated with the pump light of the pump light source and re-emits said pump light at least partly in a wavelength-converted fashion, d. wherein the two phosphor wheels are configured for rotation about their rotation spindle, and e. wherein the two phosphor wheels are arranged directly one behind the other and with respect to one another and with respect to a beam path of the pump light source such that
i. the first phosphor region of the first phosphor wheel is rotatable through the beam path of the pump light source,ii. the first transmitted-light region of the first phosphor wheel is rotatable through the beam path of the pump light source, andiii. the second phosphor region of the second phosphor wheel behind the first transmitted-light region of the first phosphor wheel is rotatable through the beam path of the pump light source.