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Title:
LIGHT SOURCE DEVICE
Document Type and Number:
Japanese Patent JP2009238990
Kind Code:
A
Abstract:

To provide a white light source device can align the positions and shapes of emission part images in an entire emission wavelength band, and prevent emitted light from being separated to become white light nor becoming light with a color pattern.

Light from an excitation LED 1 is collimated by a positive power optical system 2, and a part thereof passes through a dichroic prism 3, reflected by a flat mirror 6 to be returned to the dichroic prism 3, and a part thereof is reflected and output through an aperture stop 7. Light reflected on the dichroic prism 3 is focused by a positive power optical system 4, and produces an image of the excitation LED 1 on a phosphor 5. Thereby, fluorescence generated from the phosphor 5 is collimated by the positive power optical system 4, passes through the dichroic prism 3, and is output through the aperture stop 7. Thereby, white light with direct light and fluorescence mixed therein is output from the aperture stop 7.


Inventors:
KATSUNUMA ATSUSHI
OHIRA HIROHISA
Application Number:
JP2008000082711
Publication Date:
October 15, 2009
Filing Date:
March 27, 2008
Export Citation:
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Assignee:
NIKON CORP
International Classes:
G02B5/04; G02B5/28; H01L33/00; H01L33/50; H01L33/58; H01L33/60; H01S5/022
Attorney, Agent or Firm:
特許業務法人オカダ・フシミ・ヒラノ