Definition of Ramsden in English:

Ramsden

noun ˈramzdən

Optics

Attributive and (now rare) in the genitive. Designating an eyepiece consisting of two planoconvex lenses of equal focal length with their convex surfaces towards each other and a separation less than their focal length.

Origin

Late 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From the name of Jesse Ramsden, English instrument-maker, who described the eyepiece in 1783 (Philos. Trans. (Royal Soc.) 73 94).

Definition of Ramsden in US English:

Ramsden

nounˈramzdən

Optics

Attributive and (now rare) in the genitive. Designating an eyepiece consisting of two planoconvex lenses of equal focal length with their convex surfaces towards each other and a separation less than their focal length.

Origin

Late 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From the name of Jesse Ramsden, English instrument-maker, who described the eyepiece in 1783 ( Philos. Trans (Royal Soc.) 73 94).

单词	Ramsden
释义	Definition of Ramsden in English: Ramsden noun ˈramzdən Optics Attributive and (now rare) in the genitive. Designating an eyepiece consisting of two planoconvex lenses of equal focal length with their convex surfaces towards each other and a separation less than their focal length. Origin Late 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From the name of Jesse Ramsden, English instrument-maker, who described the eyepiece in 1783 (Philos. Trans. (Royal Soc.) 73 94). Definition of Ramsden in US English: Ramsden nounˈramzdən Optics Attributive and (now rare) in the genitive. Designating an eyepiece consisting of two planoconvex lenses of equal focal length with their convex surfaces towards each other and a separation less than their focal length. Origin Late 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From the name of Jesse Ramsden, English instrument-maker, who described the eyepiece in 1783 ( Philos. Trans (Royal Soc.) 73 94).
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