Floodlight device

Patent metadata

Field	Value
Publication number	US-2019242553-A1
Application number	US-201716312442-A
Country	US
Kind code	A1
Filing date	Jun 5, 2017
Priority date	Jun 30, 2016
Publication date	Aug 8, 2019
Grant date	—

Abstract

A floodlight device comprises a light-emitting element that emits laser light, a fluorescent element on which light emitted from the light-emitting element is incident and which converts at least a portion of said light into fluorescent light that is output therefrom, a first optical system on which light output from the fluorescent element is incident, and a second optical system on which light exiting the first optical system is incident and which causes said light to be made into a collimated light beam that is made to exit therefrom so as to be directed toward the exterior of the device, a divergence angle of light incident on the second optical system is greater than a divergence angle of light incident on the first optical system.

First claim

1 . A floodlight device comprising:
a light-emitting element that emits laser light; a fluorescent element on which light emitted from the light-emitting element is incident and which converts at least a portion of said light into fluorescent light that is output therefrom; a first optical system on which light output from the fluorescent element is incident; and a second optical system on which light exiting the first optical system is incident and which causes said light to be made into a collimated light beam that is made to exit therefrom so as to be directed toward the exterior of the device; wherein a divergence angle of light incident on the second optical system is greater than a divergence angle of light incident on the first optical system.

2 . The floodlight device according to claim 1 wherein
the first optical system is a condensing optical system that causes light which is incident thereon to exit therefrom as a convergent light beam; and
the second optical system is arranged at a location separated from the first optical system in such fashion as to cause light exiting the first optical system to be a divergent light beam when incident on the second optical system.

3 . The floodlight device according to claim 2 further comprising a light blocking body that blocks light that is output from the fluorescent element and that is directed at the second optical system without having passed through the first optical system;
wherein the light blocking body comprises an optical path unit for allowing light that exits the first optical system to pass therethrough and be incident on the second optical system.

4 . The floodlight device according to claim 3 wherein
the optical path unit is arranged at a location of a focus of the first optical system; and
a locus of the optical path unit is larger than an optical output locus of the fluorescent element.

5 . The floodlight device according to claim 3 wherein the light blocking body comprises a reflecting layer at a surface thereof.

6 . The floodlight device according to claim 1 further comprising:
a first casing that houses at least the light-emitting element; and
a second casing that houses at least the second optical system;
wherein volume at the interior of the first casing is less than volume at the interior of the second casing; and
hermeticity of the first casing is greater than hermeticity of the second casing.

7 . The floodlight device according to claim 6 wherein at least a portion of the first casing is arranged at the interior of the second casing.

8 . The floodlight device according to claim 6 further comprising:
a heat dissipating unit that causes heat produced by the light-emitting element to be discharged to the exterior of the first casing;
wherein the heat dissipating unit is arranged at the exterior of the second casing.

9 . The floodlight device according to claim 6 wherein
the second casing comprises an open portion for allowing circulation of air between the interior of the second casing and the exterior of the second casing; and
the open portion is arranged so as to face the direction of gravity.

10 . A floodlight device comprising:
a solid-state light source element that emits light; an optical element on which light emitted from the solid-state light source element is incident and which causes said light to exit therefrom so as to be directed toward the exterior of the device; a first casing that houses the solid-state light source element; and a second casing that houses the optical element; wherein volume at the interior of the first casing is less than volume at the interior of the second casing; and hermeticity of the first casing is greater than hermeticity of the second casing.

11 . The floodlight device according to claim 4 wherein the light blocking body comprises a reflecting layer at a surface thereof.

12 . The floodlight device according to claim 2 further comprising:
a first casing that houses at least the light-emitting element; and
a second casing that houses at least the second optical system;
wherein volume at the interior of the first casing is less than volume at the interior of the second casing; and
hermeticity of the first casing is greater than hermeticity of the second casing.

13 . The floodlight device according to claim 12 wherein at least a portion of the first casing is arranged at the interior of the second casing.

14 . The floodlight device according to claim 12 further comprising:
a heat dissipating unit that causes heat produced by the light-emitting element to be discharged to the exterior of the first casing;
wherein the heat dissipating unit is arranged at the exterior of the second casing.

15 . The floodlight device according to claim 10 wherein at least a portion of the first casing is arranged at the interior of the second casing.

16 . The floodlight device according to claim 15 further comprising:
a heat dissipating unit that causes heat produced by the light-emitting element to be discharged to the exterior of the first casing;
wherein the heat dissipating unit is arranged at the exterior of the second casing.

17 . The floodlight device according to claim 16 wherein
the second casing comprises an open portion for allowing circulation of air between the interior of the second casing and the exterior of the second casing; and
the open portion is arranged so as to face the direction of gravity.

18 . The floodlight device according to claim 10 further comprising:
a heat dissipating unit that causes heat produced by the light-emitting element to be discharged to the exterior of the first casing;
wherein the heat dissipating unit is arranged at the exterior of the second casing.

19 . The floodlight device according to claim 18 wherein
the second casing comprises an open portion for allowing circulation of air between the interior of the second casing and the exterior of the second casing; and
the open portion is arranged so as to face the direction of gravity.

20 . The floodlight device according to claim 10 wherein
the second casing comprises an open portion for allowing circulation of air between the interior of the second casing and the exterior of the second casing; and
the open portion is arranged so as to face the direction of gravity.

Assignees

• Ushio Electric Inc

Inventors

• Matsuoka Tomomi

Classifications

• F21V7/26

  the material comprising photoluminescent substances · CPC title

• F21V7/28

  characterised by coatings · CPC title

• F21V14/06

  by movement of refractors {(in vehicle head lamps F21S41/635)} · CPC title

• G02B19/00

  Condensers, {e.g. light collectors or similar non-imaging optics}(for microscopes G02B21/08) · CPC title

• F21V29/67

  characterised by the arrangement of fans · CPC title