General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

glass plate/ aluminum frame/ metal hardware

Dimensions

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

Length

16.3 cm

Width

13.8 cm

Height

N/A

Thickness

1.0 cm

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Light & electromagnetic radiation

Sub-Category

N/A

Manufacturer

AKA

Sollid

Country

United States of America

State/Province

New Mexico

City

Los Alamos

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) & the National Museum of Science and Technology, circa 1988-1989.

Function

A medium which presents a three dimensional image, in this case a photoelastic model in diffused light.

Technical

One of a number of early holograms produced by Jon E. Solid in 1969-1971 at General Dynamics in Fort Worth, Texas, for interferometric research purposes. This is a laser transmission, double exposure hologram done with a Helium/Neon laser. 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). In 1965 Robert Powell and Karl Stetson published the first paper on holographic interferometry. This technique uses the interference between light beams to make more than one exposure on a single plate, of the same object in double exposure holograms, of the ambient air & a moving object in dynamic holograms, & of the same object recorded by two different wavelengths of laser light in contour interferometry (Refs. 1 & 2).

Area Notes

Unknown

Details

Markings

"72" printed in red on glass/ "PHOTOELASTICITY DIFFUSE LIGHT" formerly printed in white crayon (no longer visible - see old worksheet in Supp. Info.)

Missing

appears complete

Finish

colourless transparent glass/ anodized aluminum frame

Decoration

N/A