IPC Subgroup
G02B 21/14 affording illumination for phase-contrast observation
Introduced: September 1968
Last revised: January 2006
Full Title
Microscopes > Means for illuminating specimen > Condensers > affording illumination for phase-contrast observation
Classification Context
- Section:
- PHYSICS
- Class:
- OPTICS
- Subclass:
- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS