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On 25 August 2009, U.S. patent 7,580,533 was issued for a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air ("Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path"). Sound pressure waves cause disturbances in the smoke that in ...
A laser microphone can be used to reconstruct audio from a laser beam shot onto an object in a room, or the glass pane of a window. Researchers have also prototyped a method for reconstructing audio from video of thin objects that can pick up sound vibrations, such as a houseplant or bag of potato chips. [18]
A new type of laser microphone is a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air. On August 25, 2009, U.S. patent 7,580,533 issued for a Particulate Flow Detection Microphone based on a laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path.
The previous record had been set with a one-way detection of laser light from Earth by the Galileo probe, of 6 million km (3.7 million mi) in 1992. In January 2013, NASA used lasers to beam an image of the Mona Lisa to the Lunar Reconnaissance Orbiter roughly 390,000 km (240,000 mi) away.
The cavity was a high-Q round silver-plated copper "can", with the internal diameter of 31 ⁄ 40 in (19.7 mm) and about 11 ⁄ 16 in (17.5 mm) long, with inductance of about 10 nanohenries. [5] Its front side was closed with a very thin (3 thou , or 75 micrometers) and fragile conductive membrane.
Not only does the Rukus FX mix music, it has an LED light show and over 80 sound effects. And of course, there's a built-in microphone for vocals.
The Philips development of the videodisc technology began in 1969 with efforts by Dutch physicists Klaas Compaan and Piet Kramer to record video images in holographic form on disc. [12] [13] Their prototype Laserdisc shown in 1972 used a laser beam in reflective mode to read a track of pits using an FM video signal. Together with MCA, Philips ...
Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).
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