Patent ID: 6097019
Filing Date: 2000-08-01
Classification: B01J,G01N,H05B

Abstract:
A system for controlling the application of radiation to a workpiece in a cavity comprising:time tracking means for tracking current times;means for receiving an applied power signal indicative of a magnitude of an applied intensity of said radiation;means for receiving a reflected power signal indicative of a magnitude of a reflected intensity of said radiation;means for receiving a temperature signal indicative of a magnitude of a temperature of said workpiece;minimizing means for causing .alpha. to be less than a predetermined value and for providing a signal corresponding to a current value of one of said current times, wherein .alpha. is the ratio of said magnitude of said reflected intensity over said magnitude of said applied intensity;said minimizing means being coupled to said time tracking means, to said means for receiving said applied power signal indicative of said magnitude of said applied intensity, to said means for receiving said reflected power signal indicative of said magnitude of said reflected intensity and to said means for receiving said temperature signal indicative of said magnitude of said temperature of the workpiece;temperature control means coupled to said time tracking means, for producing an intensity signal indicative of said magnitude of said applied intensity of said radiation to control said temperature of said workpiece to be substantially equal to a desired temperature;means for determining when said workpiece has achieved a final determined physical condition; said means for determining is coupled to said time tracking means; andmeans for setting desired temperature based on current physical condition;means for producing an end signal to end operation of said system when said workpiece has achieved said final predetermined physical condition; said means for producing is coupled to said time tracking means.