Illumination light source device and laser projection device

Details Illumination light source device and laser projection device Illumination light source device and laser projection device

2007-02-22

2010-11-16

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular beam control device

Control of pulse characteristics

C372S024000, C372S026000, C372S034000, C372S096000, C372S099000, C372S102000, C362S259000

Reexamination Certificate

active

07835409

ABSTRACT:
An illumination light source is provided with a laser light source having a laser medium with a specified gain region, and a reflector having a narrow band reflection characteristic. A part of a laser light emitted from the laser light source is reflected and fed back by the reflector, so that an oscillation wavelength of the laser light source is fixed at a reflection wavelength. A peak of a gain region of the laser medium is shifted from the reflection wavelength by a change of an oscillation characteristic of the laser light source, so that the oscillation wavelength of the laser light source is changed from the reflection wavelength. Thus, an oscillation spectrum of the laser light source is spread to reduce speckle noise.

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International Search Report issued May 22, 2007 in the International (PCT) Application No. PCT/JP2007/053268.

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