IPC Subgroup
G02B 9/38 both – components being meniscus
Introduced: September 1968
Last revised: January 2006
Full Title
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – > having four components only > arranged + –– + > both – components being meniscus
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
2 direct subcodes
Child Classifications
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