Light Source Device, Illumination Optical Device, and Display Device

摘要

A transmissive sealing member 18 is provided on an exit opening portion of an ellipsoidal mirror 11 and forms a sealed space inside the ellipsoidal mirror 11 . A light shielding member 12 a is formed on a surface of the transmissive sealing member 18 on a side of a discharge lamp 10 . The ellipsoidal mirror 11 condenses the light emitted from the discharge lamp 10 and outputs the light to the outside. The light shielding member 12 a shields the light, which is reflected and returns toward the discharge lamp 10 , of the light emitted from the ellipsoidal mirror 11 to the outside. In this way, temperature rise of parts of the discharge lamp 10 is suppressed and reliability of a light source device 17 a is improved.