Establishments primarily engaged in manufacturing instruments and apparatus that measure an optical property and optically project, measure, or magnify an image, such as binoculars, microscopes, prisms, and lenses. Included are establishments primarily engaged in manufacturing optical sighting and fire control equipment.

  • Aiming circles (fire control equipment)
  • Binoculars
  • Boards: plotting, spotting, and gun fire adjustment
  • Borescopes
  • Cinetheodolites
  • Coddington magnifying instruments
  • Contour projectors
  • Correctors: percentage, wind, and roll (sighting and fire control
  • Fuse setters (fire control equipment)
  • Glasses, field or opera
  • Gratings, diffraction
  • Gun sights, optical
  • Interferometers
  • Lens coating
  • Lens grinding, except ophthalmic
  • Lens mounts
  • Lenses, optical: photographic, magnifying, projection, and instrument
  • Light sources, standard
  • Lupes magnifying instruments, optical
  • Magnifying instruments, optical
  • Metallographs
  • Microprojectors
  • Microscopes, except electron, proton and corneal
  • Mirrors, optical
  • Optical alignment and display instruments, except photographic
  • Optical comparators
  • Optical test and inspection equipment
  • Periscopes
  • Phototheodolites
  • Prisms, optical
  • Reflectors, optical
  • Searchlight mirrors and reflectors
  • Sighting and fire control equipment, optical
  • Spy glasses
  • Telescopes
  • Telescopic sights
  • Triplet magnifying instruments, optical