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IPC Subgroup
G02B 9/2

the rear component having the compound

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 three components only > arranged + – + > only one component having a compound lens > the rear component having the compound

Classification Context

Section:
PHYSICS
Class:
OPTICS
Subclass:
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS