Abstract: A method of manufacturing a master for producing a hologram device. A first master is produced with a compensating angle. The second master is produced from the first master with an index matching material to reduce the interference pattern caused by internal reflections within the holographic plate of the master. The hologram device has a relatively narrow angle of reconstruction to provide visibility from a nearly perpendicular light source such as the headlight of an on-coming vehicle.
Type:
Grant
Filed:
July 2, 2007
Date of Patent:
July 10, 2012
Assignee:
Ciaudelli Productions, Inc
Inventors:
Joseph J. Ciaudelli, Ikuo Nakamura, Ana Maria Nicholson
Abstract: A method of manufacturing a master for producing a hologram device. A first master is produced with a compensating angle. The second master is produced from the first master with an index matching material to reduce the interference pattern caused by internal reflections within the holographic plate of the master. The hologram device has a relatively narrow angle of reconstruction to provide visibility from a nearly perpendicular light source such as the headlight of an on-coming vehicle.
Type:
Grant
Filed:
September 24, 2004
Date of Patent:
August 21, 2007
Assignee:
Ciaudelli Productions, Inc.
Inventors:
Joseph J. Ciaudelli, Ikuo Nakamura, Ana Maria Nicholson