Patent ID: 9250506
Filing Date: 2016-02-02
CPC Classification: F21V,G02B,G03B

Claim Text:
1. An illumination light source device, comprising: a light path junction member which splits light emitted from a light source into a first light path emitting excitation light for phosphor and a second light path irradiating illumination light, the light path junction member including a reflection/transmission member having a transmission area which transmits light from the light source and a reflection area which reflects light from the light source; a light path-combining element which combines the first and the second light paths; a first diffuser disposed in the first light path, the first diffuser including a first transmission/diffuser member which transmits and diffuses the excitation light towards a phosphor member; and a second diffuser disposed in the second light path, the second diffuser including a second transmission/diffuser member which transmits and diffuses the illumination light towards the light path-combining element, and a diffusion degree larger than that of the first diffuser, wherein a first distance between the first transmission/diffuser member and the reflection/transmission member is longer than a second distance between the second transmission/diffuser member and the reflection/transmission member.