| 摘要 |
PROBLEM TO BE SOLVED: To provide inexpensive circle fluorescent lamp fixture accurately receiving infrared signals coming in various directions of a transmissive cover by one infrared detector. SOLUTION: Plural optical fibers 80 are used together. Respective input terminals 82 of the optical fibers 80 are arranged so as to face in the different directions each other. Infrared signals incident on a transmissive cover 30 are collected to the position of an infrared detector 90 through the respective optical fibers 80. Thus, the infrared signals coming in the various directions are accurately received by the single infrared detector 90. |
