| 摘要 |
PURPOSE: A three-dimensional optical code encoder and decoder is provided to generate more codes than two-dimensional optical codes and to generate three-dimensional optical codes having a strong orthogonal degree. CONSTITUTION: A three-dimensional optical code encoder is composed of a luminous source(1), an optical circulator(Cir1), an AWGM(Arrayed Waveguide Grating Multiplexer)(20), a plurality of optical fiber delay lines, and a plurality of optical fiber gratings. The luminous source(1) emits light having various wavelength components of a wide band and provides the optical signal to the input port(In1) of the optical circulator(Cir1). The optical circulator(Cir1) supplies the optical signal provided from the optical circulator(Cir1) to the AWGM(20). The AWGM(20) separates the supplied optical signal by wavelength components and provides them to the optical fiber delay lines and the optical fiber gratings, connected to each port in turn, through each port. |
