General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

nickel hologram/ metal frame & hardware/ cardboard mat/ hardboard backing/ synthetic tape & parts

Dimensions

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

Length

36.3 cm

Width

29.3 cm

Height

N/A

Thickness

2.4 cm

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Light & electromagnetic radiation

Sub-Category

N/A

Manufacturer

AKA

See 3

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Ontario

Period

late 1980s

Canada

Unknown

Function

A medium which presents a three dimensional image, in this case of a pair of sunglasses. This was master copy of hologram, used for mass replication for advertising purposes.

Technical

An example of a master for an embossed hologram, in the form of a nickel plate, from which multiple copies were made. 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. In 1968 Dr. Stephen A. Benton invented white-light transmission holography; this type of hologram can be viewed in ordinary white light creating a "rainbow" image from the seven colours which make up white light. This invention made possible mass production of holograms using an embossing technique, now the most frequently used method mass-production in holography. Embossed holograms are transmission holograms with a mirror backing that are usually applied to magazines, credit cards and promotional materials. Holographic information is transferred from light sensitive glass plates to nickel embossing shims. The holographic images are printed by stamping the interference pattern onto plastic and then backing the images with a light reflecting foil. The resulting hologram can be duplicated millions of times for a few cents apiece (Ref. 1).

Area Notes

Unknown

Details

Markings

label on front reads "SEE 3 HOLOGRAMS LTD./ 4 MACAULAY ROAD,/ LONDON SW4 OQX." / lettering reading "MARATHON", "ROBERT LA ROCHE" & "HOLOTRON MILANO 1986"

Missing

appears complete

Finish

chrome plated frame/ grey mat/ brown hardboard

Decoration

pair of folded sunglasses visible on hologram