Lighthouse lantern for lighthouse using laser diode and fluorescent substance

Patent metadata

Field	Value
Publication number	US-10583899-B2
Application number	US-201715769230-A
Country	US
Kind code	B2
Filing date	Jan 4, 2017
Priority date	Jan 5, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.

First claim

What is claimed is:

1. A lighthouse lantern comprising:
a power supply;
a laser diode configured for receiving power from the power supply and irradiating laser in one direction;
a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and
a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter,
wherein each of the pair of reflective structures has a conical shape, wherein vertex portions of the cones of the pair of reflective structures are positioned on a traveling line of the laser, wherein the phosphor-containing emitter is in contact with the vertex portions of the cone, wherein the vertex portion of one of the pair of reflective structures is open such that the laser is incident on the phosphor-containing emitter.

2. The lighthouse lantern of claim 1 , wherein the lighthouse lantern further comprises a Fresnel lens disposed around the pair of reflective structures.

3. The lighthouse lantern of claim 1 , wherein the phosphor-containing emitter includes an inorganic material base body with a predetermined shape, and phosphors dispersed in the base body.

4. The lighthouse lantern of claim 1 , wherein the phosphors include at least one selected from a group consisting of (Y,Tb) 2 Al 5 O 12 :Ce 3+ , (Sr,Ba,Ca) 2 Si 5 N 8 :Eu 2+ , CaAlSiN 3 :Eu 2+ , BaMgAl 10 O 17 :Eu 2+ , BaMgAl 10 O 17 :Eu 2+ ,Mn 2+ , Ca-alpha-SiAlON:Eu 2+ , Beta-SiAlON:Eu 2+ , (Ca, Sr,Ba) 2 P 2 O 7 :Eu 2+ , (Ca, Sr,Ba) 2 P 2 O 7 :Eu 2+ ,Mn 2+ , (Ca, Sr,Ba) 5 (PO 4 ) 3 Cl:Eu 2+ , Lu 2 SiO 5 :Ce 3+ , (Ca, Sr,Ba) 3 SiO 5 :Eu 2+ , (Ca, Sr,Ba) 2 SiO 4 :Eu 2+ , Zn 2 SiO 4 :Mn 2+ , BaAl 12 O 19 :Mn 2+ , BaMgAl 14 O 23 :Mn 2+ , SrAl 12 O 19 :Mn 2+ , CaAl 12 O 19 :Mn 2+ , YBO 3 :Tb 3+ , LuBO 3 :Tb 3+ , Y 2 O 3 :Eu 3+ , Y 2 SiO 5 :Eu 3+ , Y 3 Al 5 O 12 :Eu 3+ , YBO 3 :Eu 3+ , Y 0.65 Gd 0.35 BO 3 :Eu 3+ , GdBO 3 :Eu 3+ and YVO 4 :Eu 3+.

5. The lighthouse lantern of claim 1 , wherein the phosphor-containing emitter has a spherical shape.

Assignees

• Pukyong National Univ Industry—Univ Cooperation Foundation
• Nat Univ Pukyong Ind Univ Coop Found

Inventors

• Yang Hyun Kyoung

Classifications

• B63B51/00 Primary

  Marking of navigation route · CPC title

• F21V7/041

  with conical or pyramidal surface · CPC title

• F21W2111/00

  Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 · CPC title

• F21W2111/04

  for waterways · CPC title

• F21V7/0025

  Combination of two or more reflectors for a single light source (array of reflectors for a cluster of light sources F21V7/0083) · CPC title