WAVELENGTH CONVERSION MEMBER, OPTICAL SYSTEM HAVING THE WAVELENGTH CONVERSION MEMBER, LIGHT SOURCE DEVICE HAVING THE WAVELENGTH CONVERSION MEMBER, AND PROJECTION DEVICE HAVING THE LIGHT SOURCE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a wavelength conversion member capable of minimizing accumulation of heat due to energy loss or energy absorption caused during wavelength conversion.;SOLUTION: A wavelength conversion member 5 includes: a wavelength conversion substance 8 which responds to irradiation of excitation light P1 to generate light in a wavelength region different from the wavelength region of the excitation light P1; a first filter F1 which is disposed on an incident side of the excitation light P1, which transmits the excitation light P1, and which includes, at least a part thereof, a transmission region that selectively transmits visible light in a predetermined wavelength region as selected light P2 in the generated light in the above mentioned wavelength region, in a direction from the incident side of the excitation light, while reflecting other light as non-selected light P3 than the selected light; and a second filter F2 which is disposed on an opposite side of the wavelength conversion substance 8 to the first filter F1 and includes, at least a part thereof, a reflective region that reflects at least the selected light P2 and transmits the non-selected light P3.;COPYRIGHT: (C)2015,JPO&INPIT