ISO 19012-1:2011 specifies the use of the marking "Plan" on microscope objectives, and defines the diameter of the sharp region of the primary image of a flat object surface.
ISO 19012-1:2011 applies to visual observation using the combination of objective lens, tube lens and eyepiece, as specified by the manufacturer.
Status: WithdrawnPublication date: 2011-07
Edition: 2Number of pages: 6
Technical Committee: ISO/TC 172/SC 5 Microscopes and endoscopes