A bidirectional optical communication apparatus is composed of a set of a first device (1) and a second device (2). Using linear-polarization plates (11A, 11B, 21A, and 21B) and quarter wavelength plates (31A, 31B, 41A, and 41B), a transmission section (TX1) of the first device (1) radiates a first signal...http://www.google.fr/patents/US6359712?utm_source=gb-gplus-shareBrevet US6359712 - Bidirectional optical communication apparatus and optical remote control apparatus
Bidirectional optical communication apparatus and optical remote control ...
