Optical transmission apparatus employing an illumination light
First Claim
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1. An optical transmission apparatus for transmitting and receiving information by employing light through a free space comprising:
- an illumination light source;
a power source means for supplying power to said illumination light source;
a modulation means for modulating wave forms of said power supplied from said power source means to said illumination light source in response to said information;
a signal transmitting apparatus for transmitting a modulated illumination light obtained from said illumination light source;
a signal receiving means for receiving said modulated illumination light from said illumination light source; and
a signal receiving apparatus having a demodulating means to demodulate said information out of said modulated illumination light received by said signal receiving means.
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Abstract
An illumination light source such as LED illumination light is modulated by information supplied from a personal computer. The illumination light is thereby modulated and transmits the information. Then the illumination light is received by a light receiving device, and is demodulated to drive an apparatus such as a printer connected to the light receiving device to print the information.
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Citations
7 Claims
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1. An optical transmission apparatus for transmitting and receiving information by employing light through a free space comprising:
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an illumination light source;
a power source means for supplying power to said illumination light source;
a modulation means for modulating wave forms of said power supplied from said power source means to said illumination light source in response to said information;
a signal transmitting apparatus for transmitting a modulated illumination light obtained from said illumination light source;
a signal receiving means for receiving said modulated illumination light from said illumination light source; and
a signal receiving apparatus having a demodulating means to demodulate said information out of said modulated illumination light received by said signal receiving means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmission device for an optical transmission apparatus for transmitting information by employing light through a free space comprising:
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an illumination light source;
a power source means for supplying power to said illumination light source;
a modulation means for modulating wave forms of said power supplied from said power source means to said an illumination light source in response to said information; and
a signal transmitting apparatus for transmitting a modulated illumination light obtained from said illumination light source.
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Specification