Home UK English eyepiece micrometer

Meaning of eyepiece micrometer in English:

eyepiece micrometer

noun

  • A scale of measurement inside an eyepiece that can be viewed at the same time as the image, on which it appears superimposed; an eyepiece incorporating such a scale.

Origin

Early 19th century; earliest use found in David Brewster (1781–1868), natural philosopher and academic administrator.