Holography with insensitivity to object size

Details Holography with insensitivity to object size Holography with insensitivity to object size

1984-04-04

1987-02-24

Arnold, Bruce Y.

G03H 104

Patent

active

046452915

ABSTRACT:
Holograms of objects are made on a light-responsive medium with the aid of a reference beam and an object beam reflected by the object and, throughout the light-responsive medium, are rendered insensitive to object size by projecting the reflected object beam onto the medium at an angle to said reference beam which is constant throughout the medium within a tolerance imperceptible to that light-responsive medium in terms of spatial frequency of the hologram. Preferably, the reflected object beam is projected onto the light-responsive medium at a constant angle of incidence throughout that medium, and is projected through an aperture having a diameter equal to the angle of the reflected object beam to the reference beam, divided by the product of an angular resolution of the hologram and the above mentioned spatial frequency.

REFERENCES:
patent: 3528719 (1970-09-01), Brooks

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