초록 ▼

Based on binary transmission data 12, a receiver 11 emits electromagnetic waves 13 with modulated plane of polarization into a free space 16. The data propagates along the free space 16 as the azimuth of the plane of polarization. A receiver 17 accepts the electromagnetic wave 13 with modulated plan

Based on binary transmission data 12, a receiver 11 emits electromagnetic waves 13 with modulated plane of polarization into a free space 16. The data propagates along the free space 16 as the azimuth of the plane of polarization. A receiver 17 accepts the electromagnetic wave 13 with modulated plane of polarization discriminates the data based on the state of the plane of polarization, and outputs the binary received data 18. The data and the clock data are transmitted from a plurality of light-emitting units with different polarization states or wavelengths to omit PLL circuits.

대표청구항 ▼

[ We claim:] [1.]1. An optical wireless data communication system for performing communication by emitting light of a wavelength of 100 .mu.m or less into free space, comprising:a transmitter having one or more light sources for emitting two or more types of light with mutually differing optical cha

[ We claim:] [1.]1. An optical wireless data communication system for performing communication by emitting light of a wavelength of 100 .mu.m or less into free space, comprising:a transmitter having one or more light sources for emitting two or more types of light with mutually differing optical characteristics, said transmitter comprising an emitting means for individually modulating said two or more types of light based on first transmission data obtained by modulating the transmission data and second transmission data obtained by calculating and converting the transmission data, and emitting two or more mutually differing modulated signal light beams; anda receiver having one or more light-accepting portions for discriminating and accepting said two or more types of light, said receiver comprising a received data acquiring means for acquiring received data corresponding to said transmission data from the results of the calculation of the modulated signals obtained by accepting said modulated signal light which has propagated along free space.