CPC Subgroup
G02B 23/02 involving prisms or mirrors (G02B23/14 takes precedence)
Full Title
Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices > involving prisms or mirrors (G02B23/14 takes precedence)
4 direct subcodes
Child Classifications
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- G02B 23/04 for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer (G02B23/10 takes precedence)
- G02B 23/06 having a focussing action, e.g. parabolic mirror
- G02B 23/08 Periscopes
- G02B 23/10 reflecting into the field of view additional indications, e.g. from collimator