ISO-19012-1 › Microscopes - Designation of microscope objectives - Part 1: Flatness of field/Plan
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ISO 19012-1:2013 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 19012-1:2013 applies to visual observation using the combination of objective lens, tube lens and eyepiece, as specified by the manufacturer.
This marking is consistent with ISO 8578.
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Document Number
ISO 19012-1:2013
Revision Level
3RD EDITION
Status
Current
Publication Date
May 15, 2013
Committee Number
ISO/TC 172/SC 5