IPC Subgroup
G02B 3/06 with cylindrical or toric faces
Introduced: September 1968
Last revised: January 2006
Full Title
Simple or compound lenses > with non-spherical faces > with cylindrical or toric faces
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS