OPTICAL FIBER PROJECTION AND PHOTODETECTION DEVICE, OPTICAL FIBER TYPE PHOTOELECTRIC SENSOR, AND CONNECTOR FOR CONNECTING OPTICAL FIBER TYPE PHOTOELECTRIC SENSOR AND OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To improve the detection distance of the optical fiber type photoelectric sensor by improving the efficiency of optical coupling between an optical fiber, and a projector (light emitting element) and a photodetector (light receiving element). ;SOLUTION: An optical rod 12 in the shape of a frustum of a circular cone is interposed between an optical fiber 2 for projection and the projector 1. This optical rod 12 has its large-diameter end surface directed to the projector 1 and its small-diameter end surface directed to the optical fiber 2 for projection. An optical rod 12 in the shape of a frustum of a circular cone is interposed between an optical fiber 9 for photodetection and photodetector 8 as well. This optical rod 12 has its small-diameter end surface directed to the photodetector 8 and its large-diameter end surface directed to the optical fiber 9 for photodetection.;COPYRIGHT: (C)1997,JPO