1
David T Wilson, John E Wreede, John E Gunther, James A Arns: Holographic parking assistance device. Hughes Aircraft Company, Leonard A Alkov, W K Denson Low, April 11, 1995: US05406395 (313 worldwide citation)

An optical parking alignment system that includes at least one projector located on a vehicle for projecting a respective image forwardly of the vehicle, whereby alignment of the vehicle is indicated when each respective image is in focus on a screen disposed in front of the vehicle. The projector c ...


2
John E Wreede, James E Scott, David D Tanaka: System for copying multiple holograms. Hughes Aircraft Company, Leonard A Alkov, W K Denson Low, March 12, 1996: US05499118 (40 worldwide citation)

A hologram copying system that includes a first reconstruction beam, a second reconstruction beam that is incoherent with respect to the first reconstruction beam, a first master hologram responsive to the first reconstruction beam for producing a first diffracted beam, a second master hologram resp ...


3
Kevin Yu, Khin S Yin, John E Wreede: Multiple layer holograms. Hughes Aircraft Company, L A Alkov, W K Denson Low, January 25, 1994: US05282066 (32 worldwide citation)

Multiple layers or holographic exposures and methods for preparing multiple layers of holographic exposures are described. The multiple layers of holographic exposure combine to form holographic stacks and are fabricated from layers of exposed and processed photosensitive recording films, each of wh ...


4
Khin S Yin, Kevin H Yu, John E Wreede: Lamination of multilayer photopolymer holograms. Hughes Electronics, Leonard A Alkov, Wanda K Denson Low, February 25, 1997: US05606433 (27 worldwide citation)

A process for making a multilayer photopolymer hologram structure without intervening adhesive layers between component photopolymer layers. The process includes the steps of exposing a first photopolymer recording layer to hologram forming light, exposing the holographically exposed first photopoly ...


5
John E Wreede, James E Scott: Display hologram. Hughes Aircraft Company, Leonard A Alkov, W K Denson Low, October 3, 1995: US05455693 (26 worldwide citation)

A display hologram structure including a display hologram configured for reconstruction with a playback beam having a predetermined wavefront configuration, and a light configuring hologram that provides playback illumination for the display hologram pursuant to diffraction of an off-axis playback b ...


6
Gaylord E Moss, John E Wreede, Edward T Knobbe, Darrell F Hatch: High efficiency holograms by multiple-layer holography. Hughes Aircraft Company, Leonard Alkov, Wanda Denson Low, November 10, 1992: US05162927 (25 worldwide citation)

A method is disclosed for forming a multi-layer holographic device 22. A first hologram is formed on a major surface of a substrate 14. The first hologram is desensitized to prevent interaction with a second subsequently formed hologram. The second hologram is formed conterminous with said first hol ...


7
John E Wreede: Efficient holograms and method for making same. Hughes Aircraft Company, Leonard A Alkov, A W Karambelas, January 24, 1989: US04799746 (25 worldwide citation)

Light sensitive recording medium is exposed to highly absorbed incoherent light either before or after a slant fringe hologram is recorded therein to reduce the sensitivity of the medium at surface regions adjacent a supporting substrate. The fringes recorded in the area of reduced sensitivity have ...


8
James A Arns, Timothy J Edwards, Gaylord E Moss, John E Wreede: Systems for forming improved reflection holograms with a single beam. Hughes Aircraft Company, C B Bailey, A W Karambelas, July 10, 1984: US04458977 (24 worldwide citation)

A hologram forming system for forming, from a single beam source and a reflective mirror, a reflective hologram in which spurious reflection and transmission hologram recordings are eliminated. Reflected rays are changed in phase relative to the primary beams during the recording period so that spur ...


9
John E Wreede, Andrejs Graube, Mark A Mulvihill: Fabrication of holograms on plastic substrates. Hughes Aircraft Company, David W Collins, W H MacAllister, May 18, 1982: US04330604 (22 worldwide citation)

An improved process is provided for attaching layers of hydrophilic, photosensitive materials onto hydrophobic plastic substrates, which comprises forming a layer of a polycrystalline, optically transparent, moisture barrier material on the substrate, followed by depositing thereon a layer of a hydr ...


10
James A Arns, Timothy J Edwards, Gaylord E Moss, John E Wreede: Systems for forming improved diffusion holograms. Hughes Aircraft Company, Craig B Bailey, A W Karambelas, June 26, 1984: US04456328 (21 worldwide citation)

The hologram forming systems of the invention form diffusion type holograms in which undesired spurious transmission hologram recordings are eliminated. The reflecting surfaces are moved during the recording process so that the reflected rays change in phase relative to the primary recording beams a ...