CPC Subgroup Additional Only
H01J 2237/10 Lenses
Full Title
Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging > Lenses
3 direct subcodes
Child Classifications
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- H01J 2237/103 characterised by lens type
- H01J 2237/12 electrostatic
- H01J 2237/14 magnetic