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To: nycnpbbkr who wrote (8741)	11/8/1997 3:05:00 AM
From: Gerald L. Kerr	Respond to of 25960

>> I asked one of my experts about running the laser continuously and he said that the laser would be running 24 hours a day, 7 days a week and that was normal.<< I think there is a misunderstanding here. Continuous versus pulsed refers to whether the laser is emitting DUV radiation as a continuous wave train or is emitting a rapid series of pulses. Example: A garden hose emits water continuously whereas a machine gun is pulsed. How many hours per day and how many days per week the laser is used is a completely different issue. The NdYAG laser used for cutting sheet metal where I work is used continuously 16+ hours per day for five days per week. But it runs in pulsed mode rather than coninuous mode. Gerry