Laser-beam utilization device and vehicle headlight

Patent metadata

Field	Value
Publication number	US-9261259-B2
Application number	US-201214127127-A
Country	US
Kind code	B2
Filing date	May 25, 2012
Priority date	Jun 30, 2011
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A headlamp ( 1 ) that utilizes a laser beam includes a scattered-light emitting unit ( 21 ) that emits scattered light upon receipt of a laser beam deviated from a predetermined path through which the laser beam is to pass or a predetermined irradiation region that is to be irradiated by the laser beam.

First claim

The invention claimed is:

1. A laser-beam utilization device that utilizes a laser beam, the device comprising:
a scattered-light emitting unit that emits scattered light upon receipt of a laser beam deviated from a predetermined path through which the laser beam is to pass or a predetermined irradiation region that is to be irradiated by the laser beam;
a light source that emits the laser beam; and
a light emitting unit that is disposed in the predetermined irradiation region and that emits fluorescence upon receipt of the laser beam emitted from the light source.

2. A laser-beam utilization device that utilizes a laser beam, the device comprising:
a scattered-light emitting unit that emits scattered light upon receipt of a laser beam deviated from a predetermined path through which the laser beam is to pass or a predetermined irradiation region that is to be irradiated by the laser beam; and
a detector for detecting the scattered light emitted from the scattered-light emitting unit.

3. The laser-beam utilization device according to claim 2 , further comprising a stop instruction controller for instructing the light source, which emits the laser beam, to stop emitting the laser beam when the detector has detected the scattered light.

4. A laser-beam utilization device that utilizes a laser beam, the device comprising:
a scattered-light emitting unit that emits scattered light upon receipt of a laser beam deviated from a predetermined path through which the laser beam is to pass or a predetermined irradiation region that is to be irradiated by the laser beam,
wherein the scattered-light emitting unit emits fluorescence having a predetermined wavelength as the scattered light.

5. The laser-beam utilization device according to claim 2 ,
wherein the scattered-light emitting unit emits fluorescence having a predetermined wavelength as the scattered light, and
wherein the device further comprises an outdoor-light blocking filter for preventing outdoor light having a wavelength equal to or close to the predetermined wavelength from entering a detectable range of the detector.

6. The laser-beam utilization device according to claim 1 , wherein the scattered light emitted from the scattered-light emitting unit has a wavelength different from a wavelength of the fluorescence emitted by the light emitting unit.

7. A vehicle headlight comprising the laser-beam utilization device according to claim 1 .

8. A vehicle headlight comprising the laser-beam utilization device according to claim 2 .

9. A vehicle headlight comprising the laser-beam utilization device according to claim 3 .

10. A vehicle headlight comprising the laser-beam utilization device according to claim 4 .

11. A vehicle headlight comprising the laser-beam utilization device according to claim 5 .

12. A vehicle headlight comprising the laser-beam utilization device according to claim 6 .

Assignees

• Shiomi Takeshi
• Nomura Masaru
• Ohta Yoshiji
• Iwata Hiroshi
• Takahashi Koji
• Kishimoto Katsuhiko
• Sharp Kk

Inventors

• Shiomi Takeshi
• Nomura Masaru
• Ohta Yoshiji
• Iwata Hiroshi
• Takahashi Koji
• Kishimoto Katsuhiko

Classifications

• F21S41/285

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805 · CPC title

• F21Y2115/30

  Semiconductor lasers · CPC title

• B60Q1/0023

  the element being a sensor, e.g. distance sensor, camera · CPC title

• F21S41/176

  Light sources where the light is generated by photoluminescent material spaced from a primary light generating element · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title