Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-11-01
1995-04-11
Turner, Samuel A.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
356153, 356399, G02B 2722
Patent
active
054063957
ABSTRACT:
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 cam comprise a transparency and an imaging lens, or a hologram and a narrowband light source.
REFERENCES:
patent: 4737001 (1988-04-01), Moss
patent: 4890918 (1990-01-01), Monfond
patent: 5343295 (1994-08-01), Lara et al.
Arns James A.
Gunther John E.
Wilson David T.
Wreede John E.
Alkov Leonard A.
Denson-Low W. K.
Hughes Aircraft Company
Turner Samuel A.
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