| 摘要 |
PURPOSE:To eliminate the danger of misirradiation caused by forgetting to turn off an irradiation preparing switch and to achieve power saving by cutting off the irradiation preparing switch after a predetermined time is elapsed from the point of time when brightness changes. CONSTITUTION:A control circuit 4, a light detection circuit 5, a holding circuit 6 and an irradiation preparing switch 7 are provided to a control box 1 and a laser oscillation stop switch, a laser beam irradiation preparing switch and a wavelength selection switch are also provided thereto. When operation is completed and the brightness of an operating room becomes usual one and a laser beam coagulation apparatus is not used, the light detection circuit 5 is turned ON to output a reset signal R to the holding circuit 6. The holding circuit 6 turns an irradiation preparing signal OFF after the elapse of a predetermined time. By this constitution, it is eliminated to forget to turn off the irradiation preparing switch 7 and the danger of misirradiation is removed and power saving is achieved by turning the irradiation preparing switch OFF at an unnecessary time. |
