| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a visual acuity correction system by a laser with an embedded type nitrogen purge system. <P>SOLUTION: The laser system in which gas is purged and a method to purge a laser system with gas are disclosed. In one embodiment of the laser system, an excimer laser refraction correction operation system having a laser beam optical path configured so as to enable gas to be purged on a part of a volume surrounded by the optical path and a gas generator to generate gas and supply the gas to the volume part is provided. The volume part can be made a whole of the volume surrounded by the laser beam optical path or a selected part thereof. The gas can be nitrogen gas. The gas generator can be an embedded type nitrogen generator known to those skilled in the art. In one embodiment, a controller to control a flow of purge gas corresponding to received signals representing various parameters of temperature, oxygen level, pressure, humidity, flow rate, etc., is further provided. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
