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标题: Japanese scientists invent floating 'firefly' light [打印本页]

作者: Arcman    时间: 2018-2-28 04:30
标题: Japanese scientists invent floating 'firefly' light
Japanese scientists invent floating 'firefly' light

SCIENCE NEWS
FEBRUARY 23, 2018
By Hideki Kato


TOKYO (Reuters) - Japanese engineering researchers say they have created a tiny electronic light the size of a firefly which rides waves of ultrasound, and could eventually figure in applications ranging from moving displays to projection mapping.

[SharedVideo]https://www.usatoday.com/videos/tech/2018/02/23/tiny-wireless-light-kept-aloft-ultrasonic-waves/110738496/[/SharedVideo]

Named Luciola for its resemblance to the firefly, the featherweight levitating particle weighs 16.2 mg, has a diameter of 3.5 mm (0.14 inch), and emits a red glimmer that can just about illuminate text.

But its minuscule size belies the power of the 285 microspeakers emitting ultrasonic waves that hold up the light, and have a frequency inaudible to the human ear, allowing Luciola to operate in apparent total silence.

It took two years for Luciola to get this far, said circuit design specialist Makoto Takamiya, a member of the Kawahara Universal Information Network Project that developed the device.