Optoelectronic feedback control for a spectrometer
Patent 4256404 Issued on March 17, 1981. Estimated Expiration Date: 
September 28, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 28, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 06/079747 filed on 09/28/1979US Classes:356/316, By high frequency field (e.g., plasma discharge)250/205, Controlling light source intensity315/151, Load device irradiating the radiant energy responsive device315/158Radiant energy controlled regulation of the current supply for the load deviceExaminersPrimary: Evans, F. L.International ClassesG01N 21/68 (20060101)G01N 21/62 (20060101) AbstractLong-term stability for an emission type plasma spectrometer is provided by automatically adjusting the output of a power supply which is being utilized to create the plasma. The automatic adjustment is based on a feedback signal which is derived by monitoring an atomic line of a carrier gas.Other References
Field of SearchBy high frequency field (e.g., plasma discharge) | |
