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Title:
LIGHT SOURCE DEVICE, IMAGE DISPLAY DEVICE USING THE SAME, MONITOR DEVICE AND LIGHTING DEVICE
Document Type and Number:
Japanese Patent JP2008261899
Kind Code:
A
Abstract:

To provide a technology to control the interval among a plurality of optical beams, using a simple structure.

The optical beams LG1, LG2 parallel to each other are made incident to a first and a second incident planes 18a, 18b of a beam interval control element 15, respectively comprising a translucent material. The refracted first and second optical beams are intersected inside the beam interval control element 15; after that, the first optical beam LG1 is refracted again to exit from a first outgoing plane 18c, and the second optical beam LG2 is also refracted again to exit from a second outgoing plane 18d. The interval between the exiting first and second optical beam LG1a, LG2a is controlled, corresponding to the incidence position of the first and the second optical beam and the refractive index of the beam interval control element 15.


Inventors:
YONEKUBO MASATOSHI
Application Number:
JP2007102324A
Publication Date:
October 30, 2008
Filing Date:
April 10, 2007
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
G02B27/09; F21S2/00; F21V11/00; F21V14/00; G02B27/18; G02F1/13357; G03B21/14; F21Y101/00
Domestic Patent References:
JPH10282441A1998-10-23
JP2007058163A2007-03-08
JPH06331939A1994-12-02
JPH10282441A1998-10-23
JPH06331939A1994-12-02
JP2007058163A2007-03-08
Foreign References:
US20040252743A12004-12-16
US20070024959A12007-02-01
Attorney, Agent or Firm:
Meisei International Patent Office