Patent ID: 8662673

Claim:
A light source unit comprising: a light emitting plate which has a plurality of segment areas on a base material, wherein at least one of the plurality of segment areas comprises a reflecting portion, a luminescent material layer is formed on the reflecting portion and emits light of a predetermined wavelength band by receiving excitation light, and at least one of the plurality of segment areas comprises a transmission portion which transmits light; a primary light source which shines the excitation light onto the luminescent material layer and the transmission portion; and a collective optical system which collects luminescent light emitted from the luminescent material layer and light that passes through the transmission portion, which are emitted from the light emitting plate, so as to cause the collected light to converge to a same optical path; wherein the collective optical system includes: a dichroic mirror which is disposed between the primary light source and the light emitting plate to allow passage of the excitation light and to reflect the luminescent light emitted from the luminescent material layer; and a plurality of reflecting mirrors which collect the excitation light that passes through the transmission portion of the light emitting plate and the luminescent light reflected on the dichroic mirror so as to cause the collected light to converge to the same optical path to be emitted towards a same direction.