Hologram

Details Hologram Hologram

1992-10-09

1994-05-17

Ben, Loha

Optical: systems and elements

Holographic system or element

Head up display

359 15, 359 1, 359 22, 359580, 359586, 359588, G02B 532, G03H 100, C02B 110

Patent

active

053133170

ABSTRACT:
A hologram includes an optically transparent base plate having first and second opposite surfaces. A hologram element is provided on the first surface of the base plate, and has a predetermined holographic pattern. An optically transparent member has first and second opposite surfaces. The first surface of the member faces the hologram element. An arrangement serves to prevent light, which successively passes through the transparent base plate, the hologram element, and the member and is then reflected at a boundary between the second surface of the member and an atmosphere, from travelling back to the hologram element.

REFERENCES:
patent: 3601017 (1971-08-01), Glatzer et al.
patent: 3635540 (1972-01-01), Nassenstein
patent: 4530564 (1985-07-01), Close
patent: 4586780 (1986-05-01), Chern et al.
patent: 5181141 (1993-01-01), Sato et al.

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