These swirls of light, called optical vortices, could have implications for future laser devices, the physicists said.

这些光线的漩涡，称为光学旋涡，可能对未来的激光装置产生影响，物理学家说。

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With higher efficiency, construction of laser devices can achieve miniaturization and reduce weight more easily.

效率越高，激光器更易实现小型化和轻量化。

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A second possibility, for more power-hungry devices, is to fire a finely focused infrared laser beam at a photovoltaic cell, which converts the beam back to electrical energy.

第二种可能性则能应用在更加耗电的设备上。其原理是发射一道精确聚焦的红外激光线，击中光伏电池，由此能够将光束转换回电能。

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But while the proposed new legislation would cover phone tapping and mail interceptions, it conspicuously fails to deal with other, no less intrusive, forms of electronic surveillance such as long-distance microphones, laser devices and the placing of bugs.

ECONOMIST: A snooper��s charter

Portable laser pointing devices are less expensive, more powerful, and more readily available than ever.

FORBES: The Growing Threat of Lasers Pointed At Airplanes

Laser Rangefinder: Again, I have exhaustively tested several brands of handheld GPS devices alongside laser rangefinders, and I now carry only the latter.

FORBES: Best Gear for the Traveling Golfer