diffraction grating on speculum metal, gra

Made:
1881 in United States and New York
maker:
Lewis Morris Rutherfurd
and
D C Chapman
modifier:
Adam Hilger

Diffraction grating on speculum metal, grating area 44 x 42 mm, with scratched markings reading 'Made by D. C. Chapman with / L. M. Rutherfurd's Engine / 175, 2nd Avenue New York'. 'Tested by A. Hilger July 1881' and ' July 1881 / 29880 spaces / 17296 per inch', in velvet-lined mock fish skin covered case.

Related people

Details

Category:
Optics
Object Number:
2000-1449
Materials:
metal, speculum metal, textiles, wood
Measurements:
grating block: 7 x 76 x 75 mm
case, overall: 23 x 110 x 90 mm
type:
diffraction grating - reflection
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • optical instrument
  • optical instrument component
  • diffraction grating
credit:
Imperial College of Science,Technology & Medicine (Spectroscopy Group)
status:
Permanent collection

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