DISCHARGE LAMP, CABLE FOR CONNECTION, LIGHT SOURCE DEVICE, AND EXPOSURE DEVICE

摘要

A light source device having a large cooling action on the ferrule member of a discharge lamp. The light source device comprises the discharge lamp having a glass tube (25) in which an electrode for discharging is contained and a ferrule part (28) connected to the glass tube (25), and a connection cable (72). The ring-like member (74A) of the connection cable (72) is connected to the ferrule part (28) of the discharge lamp. A cool air blow passage (74Ac) is formed in the ring member (74A). An electric power is supplied from a power supply (32) to the ferrule part (28) through the power cable (33D) of the connection cable (72) and the ring-like member (74A). Cool air is supplied from an air blower (34) to the ferrule part (28) through the air blow pipe (35D) of the connection cable (72) and the ring-like member (74A).