| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting fixture equipped with a Doppler sensor in which a radiation noise generated by a fluorescent lamp is not easily emitted in a Doppler sensor. <P>SOLUTION: A virtual plane including a surface facing to a fluorescent lamp 2 in a tabular cover 4 is defined as a first plane P1. In a cross-section orthogonal to the central axis O of a light-emitting part of the fluorescent lamp 2 and in a border line of a detection range of a Doppler sensor 5 in a cross-section including a transmitting/receiving part 51 of the Doppler sensor 5, an angle θ formed by a border line 52 on the side close to the fluorescent lamp 2 and a perpendicular line to the first plane P1, a distance d between the central axis O and the first plane P1, a distance y between the first plane P1 and the transmitting/receiving part 51 and a distance x between a second plane P2 which includes the central axis O and is orthogonal to the first plane P1 and transmitting/receiving part 51 satisfy the conditions of the following expression. <P>COPYRIGHT: (C)2012,JPO&INPIT |
