Off court tennis
First Claim
1. An apparatus to provide a virtual tennis net that can be placed on any convenient surface comprising:
- (a) two movable poles each having a light source dependent thereon;
(b) at least two scanning mirrors;
(c) at least two retro-reflectors;
(d) at least two beam splitters;
(e) at least two photo-detectors; and
(f) an audible or visible signal device that is actuated in response to interruptions of light falling on said photo-detectors.
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Accused Products
Abstract
The present invention is an apparatus to provide a virtual tennis net that can be placed on any convenient surface having two movable poles each having a light source dependent thereon; at least two scanning mirrors; at least two retroflectors; at least two beam splitters; at least two photo-detectors; and an audible or visible signal device that is actuated in response to interruptions of light falling on said photo-detectors such that when a the light beam is interrupted by a tennis ball, the beam is momentarily blocked and the signal to the photo-detector is interrupted, providing a signal that is used to trigger a light or sound signal that indicates the ball did not pass over the virtual net.
9 Citations
7 Claims
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1. An apparatus to provide a virtual tennis net that can be placed on any convenient surface comprising:
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(a) two movable poles each having a light source dependent thereon; (b) at least two scanning mirrors; (c) at least two retro-reflectors; (d) at least two beam splitters; (e) at least two photo-detectors; and (f) an audible or visible signal device that is actuated in response to interruptions of light falling on said photo-detectors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification