A light source device (101) includes: a semiconductor light emitting device (1) which emits laser light; a wavelength conversion component (4) which emits fluorescence by being irradiated with the laser light emitted from the semiconductor light emitting device (1) as excitation light; and a photodetector (7) on which a portion of light emitted from the wavelength conversion component (4) is incident. The photodetector (7) is disposed at a location off a light path of usable radiation light which is emitted from the wavelength conversion component (4) to a space and used as illumination light.
LIGHT SOURCE DEVICE AND PROJECTION DEVICE
LICHTQUELLENVORRICHTUNG UND PROJEKTIONSVORRICHTUNG
DISPOSITIF DE SOURCE DE LUMIÈRE ET DISPOSITIF DE PROJECTION
2018-12-19
Patent
Electronic Resource
English
IPC: | F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / F21Y Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend die Form oder die Art der Lichtquellen oder die Farbe des emittierten Lichts , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED / H01S Vorrichtungen, die stimulierte Emission verwenden , DEVICES USING STIMULATED EMISSION |