Agfa first uses an optical single-point stylus to guarantee the flatness of the optical disks. At 45 minutes, a measuring cycle takes a very long time. Furthermore, the stylus causes the disk to vibrate, making the measuring process unreliable.
Agfa has been utilizing an ACCURA bridge-type measuring machine with the optical LineScan laser line scanner from Carl Zeiss Industrial Metrology since the fall of 2009. The sensor scans the disk in 16 paths and generates 1,470 precisely defined image points on the disk in just three minutes. CALYPSO software displays them at 100x magnification to make the curvature visible to the naked eye. Thanks to the non-contact measurement, the sensitive optical disks are neither deformed nor damaged. At the same time, Agfa receives information about the test piece accurate down to the millimeter.