Title:
HOLOGRAM-RECORDING OPTICAL MODULE AND HOLOGRAM RECORDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/208283
Kind Code:
A1
Abstract:
In order to reduce the size of a device while suppressing a reduction in hologram recording density, a hologram-recording optical module is provided with a holding unit for holding a recording medium, a first lens system, and a lens barrel for holding the first lens system; provided with a signal light lens for focusing a signal light incident on the first lens system upon the recording medium, a second lens system, and a lens barrel for holding the second lens system; and provided with a reference light lens for irradiating, with a reference light incident on the second lens system, a portion of the recording medium upon which the signal light is focused. The distance along a first optical axis from a vertex, on the recording-medium-side surface, of the lens closest to the recording medium and included in the first lens system to the surface of the recording medium is shorter than the distance along a second optical axis from a vertex, on the recording-medium-side surface, of the lens closest to the recording medium and included in the second lens system to the surface of the recording medium, and the signal light lens is provided on the opposite side from the second optical axis against a standard reference light.
Inventors:
MATSUURA ATSUSHI (JP)
Application Number:
PCT/JP2014/064594
Publication Date:
December 31, 2014
Filing Date:
June 02, 2014
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G11B7/135; G03H1/04; G11B7/0065
Foreign References:
| JP2009294512A | 2009-12-17 | |||
| JP2008197597A | 2008-08-28 | |||
| JP2012069207A | 2012-04-05 | |||
| JP2011253600A | 2011-12-15 |
Other References:
HIDEYOSHI HORIMAI: "Collinear Hoshiki", THE JOURNAL OF THE INSTITUTE OF IMAGE INFORMATION AND TELEVISION ENGINEERS, vol. 61, no. 6, 2007, pages 735 - 737
TAKUO TANAKA: "Holographic Memory, Optical Memory and its Systems for Next Generation", 31 January 2009 (2009-01-31), pages 166 - 179
TAKUO TANAKA: "Holographic Memory, Optical Memory and its Systems for Next Generation", 31 January 2009 (2009-01-31), pages 166 - 179
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
Hidetoshi Yoshitake (JP)
Hidetoshi Yoshitake (JP)
Download PDF: