Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

glass

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

14,9 cm

Largeur

10,6 cm

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Physique

Catégorie

Lumière et radiation électromagnétique

Sous-catégorie

S/O

Fabricant

Ou

Tianjin

Pays

Chine

État/province

Inconnu

Ville

Tianjin

Contexte

Pays

Canada

État/province

Ontario

Période

late 1980s

Canada

Collected for the exhibit "Images in Time & Space" mounted by the Associates of Science & Technology (AST) & NMST circa1988-1989.

Fonction

A medium which presents a three dimensional image, in this case serving as an information storage device containing 3030 pages of text.

Technique

An example of a high capacity information storage application of holography, a Fourier laser transmission hologram on bleached silver halide emulsion. It consists of microfiche book pages on a hologram & is is designed to be projected onto a microfiche screen. A Fourier hologram is a specialized hologram made for pattern recognition which uses a lens to produce a Fourier transform of the subject (Ref. 2). The theory of holography was developed in 1947 by British/Hungarian scientist Dr. Dennis Gabor while working to improve the resolution of electron microscopes. In 1960 the laser was invented and its pure white light was ideal for holography. In 1962 Emmett Leith and Juris Upatnieks of the University of Michigan, combined Gabor's theory with their own work in side-reading radar and applied it to holography, resulting in the off-axis technique of hologram production still in use & the first laser transmission hologram. Also in 1962 Dr. Yuri N. Denisyuk of the U.S.S.R combined holography with Gabriel Lippmann's work in natural colour photography to produce a white-light reflection hologram which, for the first time, could be viewed in light from an ordinary incandescent light bulb. By 1965 Leith, Upatnieks & other U.S. researchers had developed off-axis reflection holograms (Ref. 1).

Notes sur la région

Inconnu

Détails

Marques

black lettering on glass along top edge reads "No. TVS-01/ "LASER" Vol. 7, no. 1(1980) - Vol. 9, no. 10 (1982)/ "ACTA OPTICA SINICA" Vol. 2, no. 1-4 (1982)"/ brown lettering along bottom edge reads "A HOLOGRAPHIC MICROFICHE (70x43), MADE IN TIANJIN, CHINA"

Manque

appears complete

Fini

colourless transparent glass with brown stripes

Décoration

S/O