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单词 light tube
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light tube
light tube n. (a) a pipe or shaft used to guide light into the interior of a building; = light pipe n.; (b) a cylinder or strip of (usually transparent) material along which light can travel with little energy loss by means of total internal reflection; spec. one forming part of an endoscope; (also) a bundle of such cylinders or strips.
ΚΠ
1879 Sci. Amer. 21 June 389/1 If they [sc. the reflectors] are stationary the percentage of light for each floor will be constant, but if either of them is arranged to slide into and out of the light tube, it will vary the amount of light supplied to the corresponding floor.
1960 Jrnl. SMPTE 69 705 Fiber optic bundles, consisting of many thousands of small diameter (less than 0.003 in.) glass fibers can be either solid blocks or flexible light tubes.
1990 Pract. Health Spring 82/1 Normally the investigation, which consists of inserting a flexible light tube into the rectum so that the doctor can see the colon, is done under anaesthetic.
2011 D. Thorpe Solar Technol. ii. 60 Light tubes or sun pipes can transport natural daylight from roofs to rooms that do not have direct access to good natural light.
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更新时间:2024/11/11 3:42:52