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单词 Parabolic dish
释义

Parabolic dish

原声例句
科学快报-科学美国人Science Quickly, from SCIENTIFIC AMERICAN

The flowerpot acts like a parabolic dish, amplifying and concentrating sound from above into the microphone.

花盆就像一个抛物线盘,将来自上方的声音放大并集中到麦克风中。

科学快报-科学美国人Science Quickly, from SCIENTIFIC AMERICAN

It's in a field, and there's this giant six-foot-wide parabolic dish, like a satellite TV dish, pointing toward the sky.

在田野里,有一个巨大的六英尺宽的抛物面盘,就像卫星电视盘一样,指向天空。

VOA Standard 2015年11月合集

He studied ancient sailboats and the movements of birds and fish to develop a parabolic dish that rotates in a peculiar pattern while catching the wind like a ship's sail.

他对古代帆船技术,鸟类和鱼类的运动方式进行了研究,并发明出了能够通过特殊方式转动的抛物柱面反射器,造型酷似船帆。

中文百科

抛物面反射器 Parabolic reflector

(重定向自Parabolic dish)
抛物面镜锅造成的错视。
Circular paraboloid
One of the world's largest solar parabolic dishes at the Ben-Gurion National Solar Energy Center in Israel
Parallel rays coming in to a parabolic mirror are focused at a point F. The vertex is V, and the axis of symmetry passes through V and F. For off-axis reflectors (with just the part of the paraboloid between the points P1 and P3), the receiver is still placed at the focus of the paraboloid, but it does not cast a shadow onto the reflector.

抛物面反射器,也称为抛物面盘抛物面镜,通常是以抛物线回转所形成的形状做成的反射设备。抛物面反射器可以收集或分配来自光、无线电波或声波的能量。

抛物面反射器的来自于抛物面所塑造的几何形状:如果射入至收集器内表面的入射角等于反射角,那么平行于盘面光轴的任何入射光都会被反射至焦点。因为许多类型的能量可以被这样的反射,抛物面反射器可以收集和集中进入反射器的能量至一个特殊的角度上。相似的,从盘面焦点幅射出来的能量也能成为平行盘面轴心的光束发送出去。

约翰·哈德利将抛物面镜引进到实用天文学,在1721年,他使用抛物面镜制造出一个球面像差很小的反射望远镜,在这之前,望远镜都使用球面镜。在19世纪被换成效率更高的菲涅耳透镜之前,灯塔通常也都使用抛物面镜将来自灯笼的点光源校准成光束。

英语百科

Parabolic reflector 抛物面反射器

(重定向自Parabolic dish)
Circular paraboloid
One of the world's largest solar parabolic dishes at the Ben-Gurion National Solar Energy Center in Israel
Parallel rays coming in to a parabolic mirror are focused at a point F. The vertex is V, and the axis of symmetry passes through V and F. For off-axis reflectors (with just the part of the paraboloid between the points P1 and P3), the receiver is still placed at the focus of the paraboloid, but it does not cast a shadow onto the reflector.
An oblique projection of a focus-balanced parabolic reflector

A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis.

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