aperture
n. 孔, 缝隙, 孔径 [计] 窗孔; 小孔
发音
词形变化
别名
释义与例句
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1.
A small or narrow opening, gap, slit, or hole.
孔
an aperture in a wall
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2.
A hole which restricts the diameter of the lightpath through one plane in an optical system.
光圈
工程 物理 -
3.
A hole which restricts the diameter of the lightpath through one plane in an optical system.
The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.
艺术 天文 工程 物理This telescope has a 100 cm aperture.
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4.
The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.
媒体 -
5.
The maximum angle between the two generatrices.
罕用 数学If the generatrix makes an angle θ to the axis, then the aperture is 2θ.
词汇关系
相关短语
词源
From late Middle English, from Latin apertūra (“an opening”), from aperiō (“to uncover, make or lay bare”) + -tūra (“-ure”, action noun suffix). Doublet of overture and apertura.
来源：wiktionary