Title:
MULTI-WAVELENGTH LIGHT SOURCE AND LIGHT SOURCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/072360
Kind Code:
A1
Abstract:
The purpose of the preset invention is to achieve high arrival efficiency for excitation light traveling from a light-emitting element to a fluorescent body and high outcoupling efficiency for light emitted externally from the fluorescent body. A multi-wavelength light source comprises: an integrated light source wherein multiple element light sources each including a light-emitting element and a collimator element are integrated side by side; a dichroic reflective element wherein regions that selectively reflect the light with the same emission wavelength as the light-emitting element are selectively provided at the points where light beams emitted from the integrated light source impinge; a condensing element for condensing a light beam; and a fluorescent body for absorbing the light with the same emission wavelength as the light-emitting element as the excitation light and emitting fluorescent light in another wavelength bandwidth. The condensing element converts a diverging light beam mixed with the fluorescent light emitted from a condensing region on the surface of the fluorescent body and the residual excitation light reflected from the condensing region into a light beam that is propagated in the direction opposite the direction of a focused light beam to form a distant image. The converted light beam passes through the dichroic reflective element and is thereby output externally as a mixed output light beam.
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Inventors:
OSAWA OSAMU (JP)
OKAMOTO MASASHI (JP)
INOUE MASAKI (JP)
BESSHO KAZUNORI (JP)
OKAMOTO MASASHI (JP)
INOUE MASAKI (JP)
BESSHO KAZUNORI (JP)
Application Number:
PCT/JP2015/080732
Publication Date:
May 12, 2016
Filing Date:
October 30, 2015
Export Citation:
Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
F21S2/00; G03B21/14; F21V7/00; F21V7/22; F21V13/00; G03B21/00; F21Y115/10
Domestic Patent References:
| WO2014174559A1 | 2014-10-30 | |||
| WO2013047542A1 | 2013-04-04 | |||
| WO2014174560A1 | 2014-10-30 |
Foreign References:
| JP2014075221A | 2014-04-24 | |||
| JP2012004009A | 2012-01-05 | |||
| JP2011164151A | 2011-08-25 | |||
| JP2013178290A | 2013-09-09 |
Attorney, Agent or Firm:
OHI, Masahiko (JP)
Masahiko Oi (JP)
Masahiko Oi (JP)
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