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单词 Paraboloid reflector
释义

Paraboloid reflector

原声例句
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This baby’s got an 100 meter diameter collecting area, an equatorial mount, an off-axis paraboloid reflector—basically, it’s a really good radio telescope.

这个宝贝有一个 100 米直径的收集区、一个赤道仪、一个离轴抛物面反射器——基本上，它是一个非常好的射电望远镜。

中文百科

抛物面反射器 Parabolic reflector

（重定向自Paraboloid reflector）
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，也称为抛物面盘或抛物面镜，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Paraboloid reflector）
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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