| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light source apparatus that prevents the cracking of a concave reflector even if the temperature of a part that joins a short-arc type discharge lamp and the concave reflector is high, and that prevents a drop in sustaining rate of light flux due to the buildup of impurities on the reflecting surface of the concave reflector. SOLUTION: The concave reflector 10 is formed of highly pure SiO2 glass. One side of sealed section 12 of a short-arc type discharge lamp 10 is inserted into a cylindrical support section 22 of the concave reflector 22 and directly fused. Further, the sealed section and the cylindrical support section are fused together via frit glass 30 with a thermal expansion coefficientαof 0<=α<=10×10-7/K.</p> |
