Patent ID: 7210825

Claim:
A light source device comprising: a concave reflector having an open front end section; a light source having a light emitting unit, the unit being positioned on a focal point of the reflector; a cover attached to the open front end section of the reflector to cover the open front end section, the cover having an air inflow opening provided at a side section thereof in relation to the open front end section, at least a part of the cover being made of a transparent material, the part being a light passage through which light emitted by the light source and reflected by the reflector passes; a fan having an air outflow opening, the fan being provided so that airflow created by the fan and blown through the air outflow opening is directed to the air inflow opening of the cover, without obstructing the light passing through the light passage, a direction of the airflow blown through the air outflow opening of the fan being opposed to a direction of the light passing through the light passage; and an air control unit provided between the air outflow opening of the fan and the air inflow opening of the cover, the air control unit controlling the airflow blown through the air outflow opening of the fan so that the airflow blown through the air outflow opening is flown into the reflector through the air inflow opening of the cover and directed at least to one specific section of the light source, thus cooling the specific section.