| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem associated with the generation of optical cross talk through multiple reflection within a planar optical circuit, to reduce the size, and to provide a good cross talk performance. SOLUTION: A first light shielding member 26 is arranged between light receiving side reflection surfaces 25a which are provided in the path from incident light beams to a light receiving section and optical circuit side reflection surfaces 22a, which are the top surface of a planar optical circuit 22 and the rear surface like of a substrate 21, with a distance from the light receiving section side reflection surfaces 25a. A second light shielding member 27 is arranged in the region, which is sandwiched between the light receiving side reflection surfaces 25a and the first light shielding member 26, so as to optically shield the set of mutually different light emitting sections and light receiving sections 25. Thus, reflected optical components having angles which are equal to or greater than the angles determined by the distance between the light receiving section side reflection surfaces 25a and the light shielding film and by the opening width of the light shielding film, can not reenter onto the planar optical circuit, and no major cross talk is generated even though mirror light emitting angles are greatly dispersed. COPYRIGHT: (C)2005,JPO&NCIPI |
