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PCE
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DIFF Subgroup
G02B 9/26

the front and rear components having compound lenses

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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 > the front and rear components having compound lenses

CPC:

Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - (G02B15/00 takes precedence) > having three components only > arranged + - + > two of the components having compound lenses (G02B9/30 takes precedence) > the front and rear components having compound lenses

No child classifications to compare. This is a leaf node in both IPC and CPC.