Object having a holographic security feature and method for...
Off-axis holographic instrument illuminator
One piece frame for holding a holographic element in a...
Optical apparatus for the simultaneous production of a...
Optical device, labeled article, optical kit and...
Optical display apparatus
Optical holographic printing and typesetting machinery
Optical image comparison device for identification verification
Optical information recording medium, and recording method...
Optical observation arrangement for decoding layers of...
Optical recording card having hologram contained therein and...
Optical security element