Concave diffraction grating on speculum metal, grating area 53 x 38 mm, with scratched markings 'N.P.L. / BLYTHSWOOD RULING / RULED MAY 1926 / No. 53837', in velvet lined wooden case marked V379. German typescript label in case indicates that radius is 100 cm and grating has 14402 lines per inch. A paper label marked in German indicates (according to the donor) that the grating came from Paschen's laboratory.
- Object Number:
case: 88 x 88 x 28 mm
grating block: 12 x 71 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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