Title:
HOLOGRAM REPRODUCTION DEVICE AND HOLOGRAM REPRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2005/098552
Kind Code:
A1
Abstract:
There is provided a hologram reproduction device whose size can be reduced. The hologram reproduction device reproduces recorded information from a recorded recording medium obtained by recording a diffraction grating area generated by interference between a reference light beam and a signal light beam when the reference light beam which is coherent and the signal light beam which has been spatially modulated in accordance with recording information are applied on the same optical axis to the recording medium. The hologram reproduction device includes: a light source unit for emitting a coherent light beam; a light beam irradiation unit for irradiating the light beam to the diffraction grating area of the recording medium; a light collecting unit for collecting the reproduction light beam reproduced by irradiating the light beam to the diffraction grating area, toward the convergence position; an incident light processing unit arranged at the convergence position for separating the Fourier 0-dimension component from the reproduction light beam and the diffraction light component from the reproduction light beam; and a detection unit for detecting the recording information from the diffraction light component.
Inventors:
TACHIBANA AKIHIRO (JP)
ITO YOSHIHISA (JP)
OGASAWARA MASAKAZU (JP)
TANAKA SATORU (JP)
KUBOTA YOSHIHISA (JP)
ITO YOSHIHISA (JP)
OGASAWARA MASAKAZU (JP)
TANAKA SATORU (JP)
KUBOTA YOSHIHISA (JP)
Application Number:
PCT/JP2005/005059
Publication Date:
October 20, 2005
Filing Date:
March 15, 2005
Export Citation:
Assignee:
PIONEER CORP (JP)
TACHIBANA AKIHIRO (JP)
ITO YOSHIHISA (JP)
OGASAWARA MASAKAZU (JP)
TANAKA SATORU (JP)
KUBOTA YOSHIHISA (JP)
TACHIBANA AKIHIRO (JP)
ITO YOSHIHISA (JP)
OGASAWARA MASAKAZU (JP)
TANAKA SATORU (JP)
KUBOTA YOSHIHISA (JP)
International Classes:
G03H1/16; G11B7/0065; G11B7/135; G03H1/22; (IPC1-7): G03H1/16; G03H1/22; G11B7/0065; G11B7/135
Foreign References:
| JP2001066977A | 2001-03-16 | |||
| JPH07311306A | 1995-11-28 | |||
| JPH07239305A | 1995-09-12 | |||
| JP2001194624A | 2001-07-19 | |||
| JP2001272636A | 2001-10-05 |
Other References:
See also references of EP 1734417A4
Attorney, Agent or Firm:
Fujimura, Motohiko (Ginza -Ohno Bldg. 1-17, Tsukiji 4-chom, Chuo-ku Tokyo 45, JP)
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