Ramsden eyepiece

noun

Rams·​den eyepiece ˈramz-dən- How to pronounce Ramsden eyepiece (audio)
: a nearly achromatic optical system that contains two plano-convex lenses with the convex surfaces facing each other and is used especially in instruments fitted with micrometer wires or a scale

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Cite this Entry

“Ramsden eyepiece.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Ramsden%20eyepiece. Accessed 24 Apr. 2024.

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