principal ray

A proper starting point is dertermined at first by attempting ray, then position of principal ray and marginal ray is calculated with iteration method.

本文介绍先借用尝试光线确定一个适当的起始点，然后用迭代法计算出主光线和边缘光线的位置，最后给出计算实例。

In the spot diagram formed by a specified beam,the center of the spot for calculating chromatic aberration should not be the cross point of principal ray with image plan,but the weighted mean of coordinates of all traced rays,namely,centroid of rays,which is determined by the distribution of traced rays.

在一束特定成像光束所形成的弥散斑上,作色差计算的光斑中心不是主光线与像面的交点,而应该是弥散斑中所有光线交点的"重心"所在,也就是所谓的质心,它是由被追迹的光线的分布和数量决定的。

Bear in mind that the chief ray is now principal ray.

记住，此时主光线就是主点光线。

Determination of major and minor elements in iron ore by X-ray fluorescence spectrometry

X射线荧光光谱法测定铁矿石中主次成分

X-ray fluorescence spectrometry for determination of major and minor components in zircon sand

X射线荧光光谱法测定锆英砂中主次成分

Determination of major and minor components in bentonite by X-ray fluorescence spectrometry

X射线荧光光谱法测定膨润土中主次成分

Determination of Major and Minor Elements in Tungsten Ores by X-ray Fluorescence Spectrometry

X射线荧光光谱法测定钨矿中主次元素

Determination of Major,Minor and Trace Elements in the Soil Sample by X-Ray Fluorescence Spectrometry

X射线荧光光谱法测定土壤中主、次、微量元素

The Principal Normal Surface of a Nonlightlike Curve in Minkowski 3-Space

三维Minkowski空间中非类光曲线的主法线曲面

I do like having a lot of light in the main living room.

我确实喜欢主起居室的光线非常好。

A reflection of that heaven rested on the Bishop.

来自天空的一线彩光正射在主教的身上。

It is mainly illuminated by shining crystal bubbles clustered in the middle of the ceiling.

光线主要由聚集在天花板中央的水晶泡泡提供。

Cable operators also install fiber optic cables from the head end to a fiber distribution node.

有线电视运营商也须把光缆从头端（主设备）接到光缆分配节点。

Determination of Major and Minor Elements in Bentonite by X-Ray Fluorescence Spectrometry

X射线荧光光谱(XRF)法测定膨润土中主次成分的方法研究

Simultaneous Determination of Major and Minor Components in Iron Ore Samples by XRF Spectrometry

X射线荧光光谱法同时测定铁矿石中的主次量组分

DETERMINATION OF MAIN COMPONENT IN COAL POWDER AND COKE ASH CONTENT WITH X-RAY FLUORESCENCE SPECTRUM

X射线荧光光谱法测定煤粉和焦炭灰分中的主组分

Determination of main and minor components in iron ores by X-ray fluorescence spectrometry with fusion sampling

熔融制样-X射线荧光光谱法测定铁矿石中主次成分

Determination of Major and Minor Components in Phosphate Ores by X-ray Fluorescence Spectrometry with Fused Bead Sample Preparation

熔融制片-X射线荧光光谱法测定磷矿石中主次量组分

Determination of Major and Minor Components in Coal Ash Samples by X-ray Fluorescence Spectrometry with Fused Bead Sample Preparation

熔片制样-X射线荧光光谱法测定煤灰样品中主次量组分

Determination of Major,Minor Elements in the Samples of SrCO_3 Product by X-Ray Fluorescence Spectrometry

X射线荧光光谱法测定碳酸锶产品中的主次组分含量