Groove Profilometer Microscope
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15
An optical system has been constructed which allows a white-light microscope with large-magnification optics to randomly measure average groove pitch width and depth over large areas of a high density erasable magneto-optic disk. The figure shows the optical system for making automated groove measurements. The system makes use of an optical apparatus employing monochromatic interferometry, data acquisition instrumentation, and computer algorithms to calculate the groove parameters. The optics can scan an area of approximately 140 grooves, and can then isolate grooves on an individual basis for further data analysis. Typically, the system operator scans a particular area of the disk, and graphs the individual grooves onto the computer screen.