G - Physics – 03 – H
Patent
G - Physics
03
H
95/43, 88/0.14
G03H 1/04 (2006.01)
Patent
CA 1266795
"PHOTOGRAPH BOOTH WITH AUTOMATIC HOLOGRAPHIC CAMERA" Abstract of the Disclosure A photograph booth for providing a hologram of a human subject positioned inside the booth in facing rela- tionship to a holographic sheet film on which the hologram of the subject is to be recorded. The booth comprises a Q-switched laser source for generating a pulsed laser beam having a coherence lenght of at least about one metre and a pulse duration of about 20 to about 100 nanoseconds, at least one beamsplitter for dividing the laser beam into a reference beam and at least one object beam, a sheet film holder for supporting the holographic sheet film in a plane facing the subject, a first optical system for diverging and guiding the reference beam toward the film, and a second optical system for diverging and guiding the at least one object beam toward the subject for illuminating same at an acute angle of incidence such as to cause light reflected by the subject onto the film to interfere with the diverged reference beam and thereby produce a hologra- phic interference pattern. The booth according to the invention further includes a white light source operable prior to activation of the laser source for illuminating the subject with white light of sufficient intensity and over a sufficient period of time to cause pupil contraction to a size permitting safe illumination of the subject by the diverged object beam, a shutter mechanism synchronized with the laser source for exposing the film to the hologra- phic interference pattern for a predetermined exposure time to record thereon the holographic interference pattern while substantially preventing stray light from reaching the film, and a film processing unit for developping the exposed film having the holographic interference pattern recorded thereon to provide a hologram representative of the human subject and viewable directly in white light.
529993
Allon Gerard
Swabey Ogilvy Renault
Trilone Holographie Corp.
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