公开(公告)号：CA2103396A1

公开(公告)日：1994-07-01

申请号：CA2103396

申请日：1993-11-18

Applicant: CORNING INC

Inventor： KOENIG DAVID M ,  MAJESTIC PETER J ,  MASCHMEYER RICHARD O

IPC: C03B20/00 ,  C03B37/012 ,  C03B37/025 ,  C03B37/07 ,  G02B6/00 ,  G05B11/42 ,  C03B37/023

Abstract: A method and apparatus for drawing glass objects from glass feedstock, wherein a dimension of the glass object is measured on-line and controlled by a control structure which compensates for the deadtime between a change to the drawing speed and the measurement of the effect of that change to the measured dimension. The model which compensates for the deadtime is preferably nonlinear, and the control gains and model parameters are preferably continuously calculated during the drawing process. The invention is particularly applicable to drawing optical waveguide cane from optical waveguide preforms.