| 摘要 |
PROBLEM TO BE SOLVED: To provide a simply-structured optical multiplexer/demultiplexer and an optical multiplexing unit. SOLUTION: The optical multiplexer/demultiplexer is equipped with: a substrate 11 composed of an optical material that is transparent in a wavelength band in use; a filter film 12 that is installed in one of the two faces 1A, 1B oppositely facing in the thickness direction of the substrate and that shows such characteristic as a split light characteristic in the wavelength band in use varies depending on the angle of incidence of a light beam; and a reflection section 13 that is installed in the other of the two faces to reflect light propagating at a first angle from the first part (e.g., part 2A) of the filter film toward the inside of the substrate and that makes the light enter the second part (e.g., part 2B) of the filter film different from the first part, at a second angle different from the first angle. COPYRIGHT: (C)2007,JPO&INPIT |
