Adaptive temperature profile control of a multizone crystal growth furnaceAn intelligent measurement system is described which is used to assess the shape of a crystal while it is growing inside a multizone transparent furnace. A color video imaging system observes the crystal in real time, and determines the position and the shape of the interface. This information is used to evaluate the crystal growth rate, and to analyze the effects of translational velocity and temperature profiles on the shape of the interface. Creation of this knowledge base is the first step to incorporate image processing into furnace control.
Document ID
19920046619
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Batur, C. (NASA Lewis Research Center Cleveland, OH, United States)
Sharpless, R. B. (Akron, University OH, United States)
Duval, W. M. B. (NASA Lewis Research Center Cleveland, OH, United States)
Rosenthal, B. N. (NASA Lewis Research Center Cleveland, OH, United States)