- Optical instruments and apparatus (5)
- Binoculars (1)
- Lenses, optical: all types except ophthalmic (3)
- Metallographs (1)
- Telescopes: elbow, panoramic, sighting, fire control, etc. (1)
- Lens grinding equipment, except ophthalmic (1)
- Gratings, diffraction (1)
- Light sources, standard (2)
- Mirrors, optical (3)
- Optical alignment and display instruments (1)
- Optical elements and assemblies, except ophthalmic (2)
- Optical test and inspection equipment (2)
