9002110055
- Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of or fittings for instruments or apparatus, other than such elements of glass not optically worked
- Objective lenses
- For cameras, projectors or photographic enlargers or reducers
- Infrared optical unit composed of - a germanium lens with a diameter of 11 mm (± 0.05 mm), - a monocrystalline calcium fluoride lens with a diameter of 14 mm (± 0.05 mm), and - a silicon lens with a diameter of 17 mm (± 0.05 mm), assembled on a machined aluminum alloy support, of a kind used for thermal imaging cameras