spot lens

noun

: a condensing lens in which the light is confined to an annular pencil by a small round diaphragm and which is used in dark-field illumination

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Cite this Entry

“Spot lens.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spot%20lens. Accessed 17 Apr. 2024.

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