Collection

'Pathological set' of twelve objective lenses

PART OF:
objective lenses and control knob
Made:
circa 1920-1939 in London, York and England
maker:
Cooke, Troughton and Simms Limited
'Pathological set' of twelve objective lenses

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'Pathological set' of twelve objective lenses
Science Museum Group
© The Board of Trustees of the Science Museum

'Pathological set' of twelve objective lenses, each lens with a known defect, in fitted box, with separate telescope, all by Cooke, Troughton & Simms Ltd, for demonstrating the effects of imperfect lenses, probably c. 1920-1939. Also three home-made 'artificial stars' consisting of ball bearings mounted on rods on a wooden base. (One lens cracked.)

Details

Category:
Optics
Object Number:
2002-423/1
Materials:
glass, brass, mahogany, felt and metals
Measurements:
box: 40 x 287 x 190 mm
lenses (in mounts): 17 x 44 mm
telescope: 311 x 53 x 45 mm
type:
objective lens
credit:
J. A. Gould.

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