Concave Rowland-type diffraction grating on specul

Made:
1882-1899
maker:
Henry Augustus Rowland

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Concave Rowland-type diffraction grating on speculum metal, grating area 88 x 42 mm, in wooden box. Unsigned, but very similar to gratings made by Brashear and Rowland. Crystalline structure visible on polished surface.

Details

Category:
Optics
Object Number:
2000-1441
Materials:
speculum metal and wood
Measurements:
grating block: 13 x 100 x 100 mm
box: 32 x 119 x 119 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)