| 摘要 |
PURPOSE:To effectively cool a light source device in a simple way, by shielding a lighting member which is composed of a lighting lamp and reflection mirror and emits lights from one of the members, from the outside air by containing the member in a case, as well as introducing the outside air into the case by installing communicative holes in a part of the case. CONSTITUTION:A lighting member composed of a lighting lamp 1 and reflection mirror 2 is contained in a case 9 so that the member does not contact with the outside air directly. Lights projected from the lighting member advance in the direction shown by the arrow A through an opening 2b and are made incident on an outside optical system. Three sets of air paths 11a, 11b, and 11c (11a is not shown in the figure) which are also used for shielding the outside air are provided around the case 9 and the outside air is introduced into the case 9. An opening 2a above the reflection mirror 2 forms the upward passage of hot air in the case 9 and an air shielding plate 17 is provided between the reflection mirror 2 and case 9. Spacers 23 and 25 and light shielding plates 22, 24, and 26 are used for blocking lights and also for forming air passages. A fan 20 is suspended from the case 9 with plural piano wires so that vibration of the fan 20 can be absorbed by the piano wires. Therefore, light shielding and cooling can be realized with a simple device and this light source device can be used for a long period. |
