micrometer eyepiece

noun

Definition of micrometer eyepiece

: an eyepiece fitted with a filar micrometer the lines of which are in the focal plane of the eyepiece and so coincide with the objective image when the microscope or telescope is in focus

called also ocular micrometer

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“Micrometer eyepiece.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometer%20eyepiece. Accessed 16 May. 2021.

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