two of the components having compound lenses

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 + – + > two of the components having compound lenses

Classification Context

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

2 direct subcodes

Child Classifications

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G02B 9/26 the front and rear components having compound lenses
G02B 9/28 the middle and rear components having compound lenses