Floodlight device with two optical systems that condense and collimate laser light
AssigneeUshio Denki Kabushiki Kaisha
InventorTomomi Matsuoka
Life of this patent
Estimating the term…
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.
Claims13
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, and
- the first optical system includes a lens on which light is first incident after being output from the fluorescent element.
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;
- 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;
- and
- 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;
- the first optical system is a condensing optical system that causes light which is incident thereon to exit therefrom as a convergent light beam;
- 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;
- and
- 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.
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;
- 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 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;
- hermeticity of the first casing is greater than hermeticity of the second casing;
- and
- 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.
Dependencies are inferred from the claim text.