Title:
LIGHTHOUSE BEACON USING LASER DIODE AND PHOSPHOR AT POSITION OF FOCAL POINT OF PARABOLA
Document Type and Number:
WIPO Patent Application WO/2017/200262
Kind Code:
A1
Abstract:
Disclosed is a lighthouse beacon. The lighthouse beacon comprises: a first reflection body in which a cross-sectional shape thereof obtained by cutting the first reflection body perpendicularly to a circumference is a parabola, the inner surface thereof is a paraboloid which is obtained when the parabola rotates about an axis of a parabola passing through the parabola, and an opening is formed in the center of the paraboloid; a second reflection body having a vertex thereof that is the focal point of the parabola, and having a shape of a circular cone in which the vertex is overturned to face the direction of the paraboloid, wherein the shape of a circular cone has an outer surface which is subtended by an angle of 35 to 55 degrees with respect to the progress direction of light reflected from the paraboloid; a laser diode which is positioned below the second reflection body and is disposed such that an output terminal for outputting a laser faces the opening so as to irradiate a laser in the direction of the opening; a phosphor, which is coupled to the second reflection body so as to be positioned on the vertex of the shape of a circular cone, for emitting light as the laser is incident thereon; and a power supply unit which supplies power to the laser diode.
Inventors:
YANG HYUN KYOUNG (KR)
PARK JIN YOUNG (KR)
JOO JUNG SIK (KR)
PARK JIN YOUNG (KR)
JOO JUNG SIK (KR)
Application Number:
PCT/KR2017/005053
Publication Date:
November 23, 2017
Filing Date:
May 16, 2017
Export Citation:
Assignee:
PUKYONG NATIONAL UNIV INDUSTRYUNIV COOPERATION FOUNDATION (KR)
International Classes:
F21V7/04; F21V23/02; F21W111/047; F21Y101/00; F21Y115/30
Foreign References:
| JP2015069952A | 2015-04-13 | |||
| KR101470387B1 | 2014-12-08 | |||
| JP2005150041A | 2005-06-09 | |||
| JP2013168586A | 2013-08-29 | |||
| JP2013157241A | 2013-08-15 |
Attorney, Agent or Firm:
NAM, Gunpil et al. (KR)
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