可根据人眼所见的物体自动调焦的“智能眼镜”原型。 (Dan Hixson/University of Utah College of Engineering)

需要一付眼镜用于驾驶，另一付眼镜用于阅读的日子可能很快就一去不返了。

犹他大学(University of Utah)的研究人员发明了“智能眼镜”，无论远近都可以根据目光所及的物体自动变焦。

该项目的负责人，犹他大学电气和计算机工程教授卡洛斯·马斯特兰格罗(Carlos Mastrangelo)说：“大多数使用阅读眼镜的人都必须经常戴上和摘下眼镜。现在你不必这样做了。你带上这种眼镜，会一直看得很清楚。”

这种眼镜的镜片借助红外测距装置、电子电路和一个微型电机，可以在14毫秒内将焦点从一个物体转到另一个物体。

眼镜原型仍然显得笨重，内置电子装置和电池的框架和镜腿又粗又厚。但研究人员说，他们正在开发一个更接近于普通眼镜的轻型版本。

他们说，更棒的是，一旦新眼镜实现大量生产，眼镜使用者在验光度数改变时可以无线下载验光单。

研究人员说，自动对焦眼镜将在大约三年后上市。

该项目得到国家卫生研究院(National Institutes of Health)和国家生物医学成像和生物工程研究所(National Institute of Biomedical Imaging and Bioengineering)的资助。

ShareAmerica参加本文撰写。

The days of having one set of eyeglasses for driving and another for reading may be coming to an end.

Researchers from the University of Utah have created “smart glasses” that can automatically adjust the focus on what a person is seeing, whether it is far away or close up.

“Most people who get reading glasses have to put them on and take them off all the time,” says Carlos Mastrangelo, an electrical and computer engineering professor at University of Utah who is leading the project. “You don’t have to do that anymore. You put these on, and it’s always clear.”

And the lenses can change focus from one object to another in just 14 milliseconds. They do so with the help of an infrared distance-measuring device, some electronic circuits and a tiny motor.

The prototype is still bulky, with thick frames and handles containing the electronics and the battery, but researchers say they are working on a lighter version, much closer to ordinary glasses.

Even better, they say when the new glasses reach mass production, the owners will be able to wirelessly download their prescriptions whenever they change.

Researchers say the autofocusing glasses could be on the market in about three years.

The project was funded with a grant from the National Institutes of Health and the National Institute of Biomedical Imaging and Bioengineering.

ShareAmerica contributed to this report.

来源：2017-02-15ShareAmerica美国驻华大使馆美国驻华大使馆