Patent ID: 9400416
Filing Date: 2016-07-26
CPC Classification: F21K,F21V,F21Y,G03B,G09G

Claim Text:
1. An illumination light source device, comprising: a reflection-transmission member provided on an exit light-path of an excitation light from an excitation light source and having a transmission region transmits an excitation light as an optical wavelength and a reflection region reflecting the excitation light from the excitation light source, in which the transmission region and the reflection region sequentially traverses the exit light-path of the excitation light from the excitation light source; a fluorescent body member provided on at least one of a reflection light-path including the reflection region and a transmission light-path including the transmission region and having a fluorescent body emitting fluorescence when excited by the excitation light; a control section turning-on the excitation light source while a boundary of the transmission region and the reflection region of a reflection-transmission wheel traverses the light-path of the excitation light; a first drive part driving the reflection-transmission member so that the transmission region and the reflection region traverse the light-path from the excitation light source; a second drive part driving the fluorescent body member; a position detector for boundary region detecting the boundary region of the reflection-transmission member; a light-path junction element forming a converged light-path by converging the transmission light-path and the reflection light-path, and converging a light flux led through the transmission light-path and a light flux led through the reflection light-path, and emitting converged light flux from the illumination light source device; and an illumination light source emitting illumination light of a different color from the excitation light and the fluorescence to the converged light-path, wherein: the reflection-transmission member includes the reflection-transmission wheel, the fluorescent body member includes a fluorescent wheel, the position detector for boundary region includes a rotational angle position detector to detect a rotational angle position of the reflection-transmission member, the first drive part rotationally drives the reflection-transmission wheel, the second drive part rotationally drives the fluorescent wheel, the illumination light source device includes a first illumination optical system comprising at least the excitation light source, the reflection-transmission wheel, the light-path junction element, and the fluorescent wheel, and a second illumination optical system comprising the light source, the reflection-transmission wheel includes a beam splitter region transmitting a part of excitation light from the excitation light source and reflecting the rest of the excitation light on the reflection region of the reflection-transmission wheel at a forward portion in a rotational direction.