Method and apparatus for copying holographic disks

Details Method and apparatus for copying holographic disks Method and apparatus for copying holographic disks

1986-09-15

1988-12-13

Corbin, John K.

Photocopying

Contact printing

Light boxes

350 371, 350 373, 350 378, 355 2, G02B 532, G02B 2610, G03B 2700, G03H 130

Patent

active

047906120

ABSTRACT:
A multi-faceted holographic disk can be copied in a one-step process by using a source disk, actually a sandwich of two thin film layers of photosensitive material. The first thin film layer is capable of producing multiple reference beams simultaneously. The second thin film layers is a "master" copy of the disk to be copied. Both layers are produced using known off-axis holographic techniques. A target disk, having an unexposed film of photosensitive material is located ajacent the second thin film layer. The source disk is illuminated with coherent light, preferably in the form of a conical beam with an apparent point of origin on an axis through the common centers of the source and target disks. Several optical elements capable of producing the conical beam are illustrated.

REFERENCES:
patent: 3226557 (1965-12-01), Goodman
patent: 3419321 (1968-12-01), Barber et al.
patent: 3758186 (1973-09-01), Brumm
patent: 4151752 (1979-05-01), Perdijon
patent: 4170396 (1979-10-01), Kraft
patent: 4415224 (1983-11-01), Dickson
patent: 4547037 (1985-10-01), Case
patent: 4623776 (1986-11-01), Buchroeder et al.

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