General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

glass

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

14.9 cm

Width

10.6 cm

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Light & electromagnetic radiation

Sub-Category

N/A

Manufacturer

AKA

Tianjin

Country

China

State/Province

Unknown

City

Tianjin

Context

Country

Canada

State/Province

Ontario

Period

late 1980s

Canada

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

Function

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

Technical

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).

Area Notes

Unknown

Details

Markings

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"

Missing

appears complete

Finish

colourless transparent glass with brown stripes

Decoration

N/A