CPC Subgroup Additional Only
G01N 2201/068 Optics, miscellaneous
Full Title
Features of devices classified in G01N21/00 > Illumination; Optics > Optics, miscellaneous
2 direct subcodes
Child Classifications
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- G01N 2201/0683 Brewster plate; polarisation controlling elements
- G01N 2201/0686 Cold filter; IR filter