An on-line apparatus for accurate measurement of float-glass thickness and edge distortion was built and tested in industrial environments. The intelligent part of the sensor is a diffractive optical element. The theory and construction of the apparatus are described, and data from on-line measurements are presented.
© 2001 Optical Society of America
Jari Räsänen and Kai-Erik Peiponen, "On-Line Measurement of the Thickness and Optical Quality of Float Glass with a Sensor Based on a Diffractive Element," Appl. Opt. 40, 5034-5039 (2001)