Computer-assisted holographic image formation technique which de

Details Computer-assisted holographic image formation technique which de Computer-assisted holographic image formation technique which de

1992-11-25

1994-09-13

Ben, Loha

Optical: systems and elements

Holographic system or element

For synthetically generating a hologram

359 35, 359900, 364723, 382 31, G03H 108, G03H 104, G06F 738, G06K 976

Patent

active

053473752

ABSTRACT:
A computer-generated hologram recording apparatus includes a diffraction image generator which receives an input image signal representing an object and computes a corresponding diffraction pattern with a first sampling density. An interpolation processor is connected to the diffraction image generator via an intermediate page memory. The interpolation processor subjects the diffraction pattern to the interpolation process to create an interpolated diffraction pattern with an increased second sampling density. An interference pattern generator is connected to the interpolation processor to compute an interference caused pattern between the interpolated diffraction pattern and a reference wave by converting amplitude and phase distributions of the input image signal into the intensity distribution. A multi-beam scan printing apparatus records the interference pattern on a previously selected recording medium for later reproduction by use of white light.

REFERENCES:
patent: 3606518 (1971-09-01), Metherell
patent: 4109996 (1978-08-01), Ersoy
patent: 4701006 (1987-10-01), Perlmutter
patent: 4778262 (1988-10-01), Haines
patent: 4969700 (1990-11-01), Haines
patent: 5119214 (1992-06-01), Nishii et al.
patent: 5194971 (1993-03-01), Haines
SPIE Institute Series, vol. 158, 1990, pp. 247-267, S. A. Benton, "Experiments in Holographic Video Imaging".

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