Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1996-01-11
1998-01-06
Nguyen, Thong
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 1, 359 13, 296 9612, G02B 532
Patent
active
057061076
ABSTRACT:
A holographic viewing apparatus for allowing an operator of a bus to view a portion of a blind spot region located in front of the bus and below the windshield of the bus. The holographic viewing apparatus includes a volume transmission holographic grating attached to a lower edge of the windshield of the bus for transmissively diffracting light from a portion of the blind spot region such that an operator of the bus sees an image of the portion of the blind spot region superimposed on a scene that is directly and non-diffractingly observed through the holographic transmission grating.
REFERENCES:
patent: 3737212 (1973-06-01), Antonson et al.
patent: 4261635 (1981-04-01), Freeman
Alkov Leonard A.
Denson-Low Wanda K.
Hughes Electronics
Nguyen Thong
Schuberg Darren E.
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