General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

GLASS OPTICS; ALL METAL CASING; FABRIC COVERED ELECTRICAL WIRING.

Dimensions

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

Length

25.4 cm

Width

20.0 cm

Height

28.0 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 MID 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 SPECTROMETER 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

"1" & "2" incised on adjustment knobs on rearlevelling feet. "B-6" etched on side of grating; [0 ?] 3 1/2 " handwriten in pencil. Mfr's label on grating back reads " BAUSCH & LOMB/ OPTICAL CO./ ROCHESTER, N.Y. U.S.A./ [logo]/ 6400 mm RADIUS/ 600 GROOVES/mm / SERIAL NO. 64 ". "61" handwritten in pencil at upper right of label. "B&L #64 7-30-50/ 600 GROOVE/mm / Radius 6400 mm " & "B-61" etched above label.

Missing

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

Finish

CASING HAS FLAT BLACK FINISH APPLIED TO ALL EXTERIOR SURFACES.

Decoration

N/A