Holograms

Details Holograms Holograms

G - Physics

03

H

88/0.14

G03H 1/04 (2006.01)

Patent

CA 2003164

ABSTRACT In a method of preparing a three-dimensional photo- graph of a subject, for example a three-dimensional portrait, the subject is illuminated, through a diffusing screen by a source of laser light. A retro-reflective screen, comprising an array of cube-corner reflectors, is placed in front of the screen and a beam-splitting plate is arranged, between the retro-reflective screen and the subject, the beam-splitting plate being so inclined relative to the subject as to reflect some of the light from the retro-reflective screen onto a photographic film or plate disposed to one side of the subject, so that the laser light reflected from the subject, passes through the beam- splitting plate to the retro-reflective screen, is reflected back on itself to the beam splitting plate and is partially reflected thereby to form a real image of the subject, in such laser light, on the opposite side of the beam-splitting plate from the subject. The photographic film or plate is located so as to receive the light rays passing through and forming said real image and is further illuminated by said source of laser light whereby there is formed on said film or plate, after conventional development, a holographic three-dimensional image of the subject, viewable in white light.

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