Gas laser pressure control for maintaining constant pressure
Abstract
Abstract A SENSOR CIRCUIT IS PROVIDED FOR DETECTING A REDUCTION IN THE GAS PRESSURE OF AN ION LASER. THE NOISE SIGNAL VOLTAGES IN THE PLASMA CURRENT OF THE GAS LASER INCREASE RAPIDLY WITH A REDUCTION IN PRESSURE. THE SENSOR TAKES ADVANTAGE OF THIS PHENOMENON BY DETECTING THE NOISE SIGNAL SPECTRUM IN THE PLASMA CURRENT. A DISCRIMINATING CIRCUIT PASSES ONLY THOSE NOISE SIGNALS IN THE NOISE SPECTRUM EXCEEDING A PREDETERMINED VOLTAGE VALUE AND PROVIDES A CONTROL SIGNAL WHENEVER THE GAS PRESSURE FALLS BELOW A PREDETERMINED VALUE RESULTING IN THE INCREASED VOLTAGE NOISE SIGNALS. THIS CONTROL SIGNAL IS UTILIZED TO OPERATE A SOLENOID VALVE TO AUTOMATICALLY PASS REFILL GAS TO THE LASER TUBE AND THEREBY MAINTAIN THE GASS PRESSURE IN THE TUBE WITHIN A PREDETERMINED PRESSURE RANGE.
Inventors
- 👤 Robert H Neusel
- 👤 Homer Eugene Hunley
Bibliographic Details
Claims Analysis
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