A new method of observing hologram by changing the beam path in laser hologram is introduced.

本文介绍了激光全息照相中，改变光路图实现了观察全息图的新方法。

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Systematical block diagram, beam path diagram, data collection by computers and computation process are given.

给出系统框图、光路图及计算机数据采集和计算程序。

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The designing principle and theoretical analysis of the beam path of a new photoelectric liquid-level sensor are presented.

本文介绍一种新型光电式液位传感器的设计原理、光路的理论分析。

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This exploits one of the predictions of Einstein's general theory of relativity: that the path of a beam of light (which is a straight line in empty space) is bent inwards by the gravity of a massive object.

ECONOMIST: Cosmology: I spy with my little gravitational lens | The

Walk along a wooded path and the Nao diffuses and dims its beam to give you a more expansive view of the terrain.

WSJ: The Petzl Nao: A Smarter Light | At Play

Many Greyhound buses sweep the road ahead with a radar beam, which warns the driver if there is an obstacle in his path.

ECONOMIST: A safety bet