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单词 fresnel
释义

fresnel /frāˈnəl/

noun

A unit of optical frequency, equal to 1012Hz (= 1 terahertz)

ORIGIN: AJ Fresnel (1788–1827), French physicist

Fresnel ellipsoid noun

A method, used in crystal optics, of representing the doubly refracting properties of a crystal

Fresnel lens noun (image technol)

A lens having a surface of stepped concentric circles, thinner and flatter than a conventional lens of equivalent focal length

Fresnel zones plural noun (physics)

Zones into which a wavefront is divided according to the phase of the radiation reaching any point from it

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更新时间:2024/12/23 8:13:08