Concave diffraction grating on speculum metal, gra

Made:
1926, May in Teddington
maker:
National Physical Laboratory

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.

Details

Category:
Optics
Object Number:
2000-1450
Materials:
felt, metal, speculum metal, wood
Measurements:
case: 88 x 88 x 28 mm
grating block: 12 x 71 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

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.