Assertion: microscope's tube length | /r/DefinedAs | the distance
Facets:
value: between the objective rear focal plane
type: LOCATION
value: from the nosepiece opening
type: OTHER
Source sentences:
text: The mechanical tube length of an optical microscope is defined as the distance from the nosepiece opening, where the objective is mounted, to the top edge of the observation tubes where the eyepieces (oculars) are inserted.
text: The optical tube length is defined as the distance between the objective rear focal plane and the intermediate or primary image at the fixed diaphragm of the eyepiece.