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Title:
LIGHT SOURCE DEVICE AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2019/167309
Kind Code:
A1
Abstract:
The present invention provides a light source device (1) capable of increasing the light output with a plurality of semiconductor laser chips (5) while preventing the use of the plurality of semiconductor laser chips (5) from increasing the device footprint. The light source device (1) comprises: a plurality of semiconductor laser units (2) that includes a plurality of light emission regions provided on the same or different semiconductor laser chips (5), and a first refractive optical system (6) whereon a plurality of first pencils of rays emitted from the plurality of adjacent light emission regions is incident and which converts each of the plurality of first pencils of rays to a plurality of second substantially-parallel pencils of rays and emits the converted second pencils of rays; and a second refractive optical system (3) which includes a plurality of flat surfaces having different tilt angles, whereon at least a portion of each of the second pencils of rays in the plurality of second pencils of rays emitted from the same semiconductor laser unit (2) enters different flat surfaces, and which converts the traveling direction of the principal ray of each of the plurality of second pencils of rays to substantially parallel to the optical axis and emits the converted second pencils of rays. The number of the second refractive optical systems (3) corresponds to the number of the semiconductor laser units (2).

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Inventors:
SHINODA KAZUHIKO (JP)
MIURA YUICHI (JP)
Application Number:
PCT/JP2018/031118
Publication Date:
September 06, 2019
Filing Date:
August 23, 2018
Export Citation:
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Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
F21S2/00; G03B21/14; F21V5/02; F21V5/04; G03B21/00; H04N5/74; F21Y115/30
Domestic Patent References:
WO2014115194A12014-07-31
WO2010064559A12010-06-10
WO2012039895A12012-03-29
WO2013062932A12013-05-02
Foreign References:
JP2013251222A2013-12-12
JP2017138471A2017-08-10
JP2006133655A2006-05-25
JP2005024664A2005-01-27
JP2018004742A2018-01-11
JP2003207643A2003-07-25
JP2015184617A2015-10-22
JPH08234205A1996-09-13
JP2004139087A2004-05-13
JP2004151177A2004-05-27
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
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