arranged + – +

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 + – +

Classification Context

Section:

PHYSICS

Class:

OPTICS

Subclass:

OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

Child Classifications

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• G02B 9/16 all the components being simple
• G02B 9/18 only one component having a compound lens
• G02B 9/24 two of the components having compound lenses
• G02B 9/3 the middle component being a – compound meniscus having a + lens