Optical and electrical switching devices and a polymer compositi
Optical apparatus with improved lens mounting device
Optical data pattern generation device comprising phosphor membe
Optical data recording medium
Optical data storage and recording medium having a replaceable p
Optical data storage medium
Optical device for generating pattern having uniform light inten
Optical device for non-contact recording
Optical device for non-contact recording and particular facsimil
Optical disc
Optical disc and method of manufacturing
Optical disc assemblies for optical disc write/read apparatus
Optical disc humidity protected
Optical disc pressure-collapsible cover
Optical disc structure
Optical disc structure having an air sandwich structure
Optical disc structure, method and apparatus physically optimize
Optical disc unit, fabrication method and cooperating write and/
Optical disc unit, fabrication method and cooperating write and/
Optical disc write/read apparatus