Light Source Having Wavelength Converter and Wavelength Separating Member for Reflecting Converted Light

Abstract

A light source includes a light source unit which supplies first wavelength light, a wavelength converting unit which converts the first wavelength light into second wavelength light different from the first wavelength light, and a leakage preventing unit which prevents leakage of the first wavelength light out of the light source. The area where the light source unit and the wavelength converting unit are disposed is optically separated from the area where the leakage preventing unit is disposed.

1 . A light source comprising:
 a light source unit which supplies first wavelength light;   a wavelength converting unit which converts the first wavelength light into second wavelength light different from the first wavelength light; and   a leakage preventing unit which prevents leakage of the first wavelength light out of the light source,   wherein the leakage preventing unit has a wavelength separating member which transmits the second wavelength light and reflects the first wavelength light, the wavelength separating member being inclined to a plane perpendicular to the light, and a light absorbing member which absorbs the first wavelength light reflected by the wavelength separating member, the light absorbing member being inclined to the plane perpendicular to the light in the direction opposite to the wavelength separating member, and   specular reflection light of the first wavelength light produced by an optical element contained in the leakage preventing unit does not directly return to the area where the light source unit and the wavelength converting unit are disposed.