General Information

Serial #

440A2

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

FUSED QUARTZ OPTICS; METAL (INCLUDING ALUMINUM) CASING; BASE FITTED WITH THREE BRASS LEVELLING SCREWS.

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

18.0 cm

Height

17.0 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 MAY HAVE BEEN 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 SPECTROGRAPH TO SEPARATE LIGHT INTO CHARACTERISTIC WAVELENGTHS FOR PURPOSES OF OBSERVATION AND ANALYSIS.

Technical

PRISM EFFECT ON SURFACE PRODUCED BYSERIES OF FINE GROOVES, CUT ON PRECISE ANGLES. THIS GRATING IS RULED 1200 GROOVES PER MM, ON FUSED QUARTZ. ( REF. 1)

Area Notes

Unknown

Details

Markings

" [symbol] B= 1380 A/ [symbol] B= 4 [degrees] 45'/ SWR " handwritten in black marker on casing back. " SWR " incised on rear levelling screw. Mfr's decal on grating back reads " BAUSCH & LOMB OPTICAL CO./ ROCHESTER, N.Y. U.S.A./ [logo]/ 33.53.00/ CATALOGUE NO./ 440A2/ SERIAL NO./ 1200/mm / GROOVES/mm / 4[degrees] 45/ BLAZE ANGLE/ 2998.3 mm/ CONCAVE RADIUS/ BLAZE [right facing arrow] ". "440A2" etched on lower edge; "440A2" handwritten in pencil on edge of grating.

Missing

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

Finish

BRUSHED ALUMINUM CASING; NATURAL BRASS LEVELLING SCREWS AND SOME FITTINGS.

Decoration

N/A