| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an airway beacon capable of emitting two kinds of required lights with the use of an identical kind of LEDs and capable of using an identical lighting circuit. <P>SOLUTION: A white light source 17 emitting white light in one of the longitudinal directions of a runway, includes white-light LED containing 15% or more of light flux of wavelengths of the emission light from 605 nm or more to 700 nm or less relative to the total light flux. A red light source 18 emitting red light in the another side in the longitudinal directions of the runway is formed by setting a filter member 20 transmitting the light flux of the wavelengths from 605 nm to 700 nm inclusive, on LEDs of a kind identical to the kind of LEDs used for the white light source. <P>COPYRIGHT: (C)2013,JPO&INPIT |
