英语词汇“Fresnel lens”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	Fresnel lens
释义	Fres·nel lens (frə-nĕl) n. A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in lighthouses, spotlights, overhead projectors, and the headlights of motor vehicles. [AfterAugustin Jean Fresnel.] Fresnel lens Prisms that make up a Fresnel lens bend and magnify light rays, creating a single, concentrated beam of light.
随便看	downswing Down syndrome down the drain down the hatch down the line down the road down the tube down the tubes down the tubes/tube down the wind downtick downtime down-to-earth down to the wire downtown downtrend downtrodden downturn down under downward downwardly downwash downwind down with downy

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