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Title:
AXIALLY SYMMETRIC POLARIZATION CONVERSION ELEMENT
Document Type and Number:
WIPO Patent Application WO/2013/118810
Kind Code:
A1
Abstract:
Provided is an axially symmetric polarization conversion element (10) that converts incident light into an axially symmetric polarization beam. The present invention comprises a reflection portion (20) that has a shape in which a cross section in an optical axis direction of a Fresnel rhomb wavelength plate is rotated about an axis parallel to the optical axis. The incident light is converted into the axially symmetric polarization beam (PB) using Fresnel reflection twice in the reflection portion (20).

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Inventors:
WAKAYAMA TOSHITAKA (JP)
YOSHIZAWA TORU (JP)
OTANI YUKITOSHI (JP)
Application Number:
PCT/JP2013/052834
Publication Date:
August 15, 2013
Filing Date:
February 07, 2013
Export Citation:
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Assignee:
UNIV SAITAMA MEDICAL (JP)
UNIV UTSUNOMIYA (JP)
International Classes:
G02B5/30; G02B6/26; G02B27/28
Domestic Patent References:
WO2008054558A22008-05-08
Foreign References:
JP2002182030A2002-06-26
JPH09184918A1997-07-15
JP2009532733A2009-09-10
JP2004233936A2004-08-19
JP2008233903A2008-10-02
Other References:
See also references of EP 2813871A4
Attorney, Agent or Firm:
FUSE, Yukio et al. (JP)
Yukio Fuse (JP)
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Claims:



 
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