Patent
1981-11-23
1983-11-22
Arnold, Bruce Y.
G03H 120
Patent
active
044165404
ABSTRACT:
An apparatus and method for making holographic copies of film holograms via a contact copying process is disclosed. The apparatus comprises a tray having a clear flat bottom which receives the hologram master film, the blank film and a cover sheet. A pressure roller is provided to move across the cover sheet, to establish good optical contact between the films, in unison with and in alignment with a slit defining curtain being moved across the underside of the tray. A hologram reconstruction beam is beneath and aimed at the curtain so that light passes through the slit and duplicates onto the blank film only that part of the master hologram and film hologram subject to pressure from the pressure roller.
REFERENCES:
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Defensive Publication No. 697,792, by Harper et al., in Defensive Publications, published at 861 O.G., p. 703, Apr. 15, 1969.
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