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.
- Object Number:
grating block: 13 x 100 x 100 mm
box: 32 x 119 x 119 mm
- furnishing and equipment
- tools & equipment
- optical instrument
- optical instrument component
- diffraction grating
- Imperial College of Science,Technology & Medicine (Spectroscopy Group)
- Permanent collection
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