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词汇 spherical aberration
分类 英语词汇 英语翻译词典
释义

spherical aberration

英汉-汉英词典
n. 球面像差
词组 | 习惯用语
您要查找的是不是：
    spherical aberratio 球差
    spherical aberrations 球差
    spherical aberration lens 球差透镜
    xial spherical aberration 轴向球差
    axial spherical aberration 轴向球〔面像〕差；轴向球面像差；翻译
    spherical aberration correction 球面像差校正
    Spherical Aberration Compensator 球面像差补偿器; 即球面像差补偿器;
    longitudinal spherical aberration 纵向球面像差；向球差
spherical aberration n. 球面像差
英语例句库
  1. There is a different spherochromatism after the two systems correct secondary spectrum,spherical aberration and comatic aberration.
    当这两种系统消球差、彗差及复消色差后会产生不同的色球差。

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原声例句
托福阅读备考指南

So don't get nervous when you reread this quote and see inimitable contrivance or adjusting the focus, or correction of spherical and chromatic aberration.

所以当你重读这段引述时，看到无与伦比的精确，调整焦点，或中间看到时，不要紧张调整或调整焦点或校正球差和色差，不要紧张。

VOA Standard 2014年5月合集

Hubble Space Telescope Program Manager Douglas Broome delivered the troubling news: “The conclusion we’ve come to is that a significant spherical aberration appears to be present in the optics, in the optical telescope system optics, ” he said.

哈勃太空望远镜项目经理道格拉斯·布鲁姆 (Douglas Broome) 发布了这个令人不安的消息：“我们得出的结论是，光学望远镜系统的光学元件中似乎存在明显的球面像差， ” 他说。

中文百科

球面像差

球面像差红线代表二次项，蓝线代表二次和四次项之和，黑线为二、四、六次项之和

在光学中，球面像差是发生在经过透镜折射或面镜反射的光线，接近中心与靠近边缘的光线不能将影像聚集在一个点上的现象。这在望远镜和其他的光学仪器上都是一个缺点。这是因为透镜和面镜必须满足所需的形状，否则不能聚焦在一个点上造成的。 球面像差与镜面直径的四次方成正比，与焦长的三次方成反比，所以他在低焦比的镜子，也就是所谓的「快镜」上就比较明显。

对使用球面镜的小望远镜，当焦比低于f/10时，来自远处的点光源（例如恒星）就不能聚集在一个点上。特别是来自镜面边缘的光线比来自镜面中心的光线更不易聚焦，这造成影像因为球面像差的存在而不能很尖锐的成象。所以焦比低于f/10的望远镜通常都使用非球面镜或加上修正镜。

英语百科

Spherical aberration 球面像差

On top is a depiction of a perfect lens without spherical aberration: all incoming rays are focused in the focal point.The bottom example depicts a real lens with spherical surfaces, which produces spherical aberration: The different rays do not meet after the lens in one focal point. The further the rays are from the optical axis, the closer to the lens they intersect the optical axis (positive spherical aberration).(Drawing is exaggerated.)
Spherical aberration of collimated light incident on a concave spherical mirror.
Longitudinal sections through a focused beam with negative (top row), zero (middle row), and positive spherical aberration (bottom row). The lens is to the left.
A point source as imaged by a system with negative (top row), zero (middle row), and positive spherical aberration (bottom row). The middle column shows the focused image, columns to the left shows defocusing toward the inside, and columns to the right show defocusing toward the outside.
Not to be confused with barrel distortion, in which the image appears to be warped onto a sphere.

Spherical aberration is an optical effect observed in an optical device (lens, mirror, etc.) that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre. It signifies a deviation of the device from the norm, i.e., it results in an imperfection of the produced image.

近义、反义、联想词
近义词
n.
aberration, distortion, optical aberration

英英词典
spherical aberration n.
  1. a optical aberration resulting in a distorted image
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