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Abstract:
We present a simple design of a fast mechanical shutter for light beams using a low-cost personal computer loudspeaker. The shutter is capable of closing an aperture of 5 mm at a maximum speed of 1.7 mm/ms with a timing jitter of less than 10 mus. When combined with polarization optics, our device can also be used as an alterable switch and adjustable attenuator. (C) 2002 American Institute of Physics.