Achromatic deviation glass prism from artillary range-finder

Made:
1930-1950 in Glasgow
maker:
Barr and Stroud Limited
Achromatic glass deviation prism

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Achromatic glass deviation prism
Science Museum Group
© The Board of Trustees of the Science Museum

Achromatic glass deviation prism, consisting of two circular notched discs cemented together; from artillary range-finder, 70-cm baseline by Barr and Stroud Limited, Glasgow, Scotland, 1930-1950.

Details

Category:
Optics
Object Number:
1955-320
Materials:
glass and Canada balsam
Measurements:
overall: Dp.5 mm x Dia. 25 mm, Wt. 0.119kg
type:
constant deviation prism and component - object
credit:
Banfield, Arthur Clive