General Information

Serial #

1122-27-2

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

GLASS/ RECEIVED IN FOAM STORAGE TRAY WITH CARDBOARD COVER.

Dimensions

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

Length

22.0 cm

Width

11.0 cm

Height

3.0 cm

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

Bausch Lomb

Country

United States of America

State/Province

New York

City

Rochester

Context

Country

Canada

State/Province

Ontario

Period

THIS GRATING PRESUMABLY USED C. 1950S TO EARLY 1980S.

Canada

USED IN THE NATIONAL RESEARCH COUNCIL'S SPECTROSCOPY LABORATORIES, WHOSE HIGH STANDARDS AND GROUND BREAKING RESEARCH HELPED TO ESTABLISH NRC'S INTERNATIONAL REPUTATION IN THIS FIELD.

Function

USED WITH SPECTROGRAPH TO SEPARATE LIGHT INTO CHARACTERISTIC WAVELENGTHS FOR PURPOSES OF OBSERVATION AND ANALYSIS.

Technical

PRISM EFFECT ON GLASS SURFACE PRODUCED BY SERIES OF FINE GROOVES, CUT ON PRECISE ANGLES.

Area Notes

Unknown

Details

Markings

Green decal applied tograting back reads " BAUSCH & LOMB INCORPORATED/ ROCHESTER, NEW YORK, U.S.A./ [B&L logo] Certified Precision Grating/ 35-53-25-360/ CATALOGUE NO./ 1122-27-2/ SERIAL NO./ 1200/ GROOVES/mm/ 26[degrees] 45'/ BLAZE ANGLE/ ~ mm/ CONCAVE RADIUS/ BLAZE [arrow symbol points right] ". Right pointing arrow symbol stamped in black ink on lower edge of grating, with "5" handwritten in pencil, beside. "1122-27-2" framed by two right pointing arrows appears on upper long edge of grating./ "DANGER/ GRATING/ Remove carefully" handwritten in black on cardboard cover over foam storage support.

Missing

NONE. From CA of 04/12/2000 by Myles Bailey: No - Complete

Finish

Unknown

Decoration

N/A