Title:
ホログラム再生方法およびホログラム再生装置
Document Type and Number:
Japanese Patent JP7008319
Kind Code:
B2
Abstract:
To provide a hologram reproduction device capable of high speed reproduction with high reproduction quality even if a wavelength of reproducible reference light differs from a wavelength of a laser beam from a laser light source, which is used for reproduction, in the hologram reproduction device adopting a spherical reference light shift multiple recording system.SOLUTION: A hologram reproduction device comprises: a spherical wave generation condenser lens for converting reference light outputted from a laser light source into spherical reference light; a reading section for reading reproduced light obtained by irradiating a recording medium with the spherical reference light emitted from the spherical wave generation condenser lens; and a control section for controlling a position of a condensing point of the spherical reference light emitted from the spherical wave generation condenser lens to a state where a wave number vector for satisfying a diffraction condition of Bragg on a hologram of a reproduction object is obtained in the spherical reference light.SELECTED DRAWING: Figure 1
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Inventors:
Yamamoto Manabu
Shuhei Yoshida
Shuhei Yoshida
Application Number:
JP2017175424A
Publication Date:
January 25, 2022
Filing Date:
September 13, 2017
Export Citation:
Assignee:
Tokyo University of Science
International Classes:
G03H1/26; G11B7/0065; G11B7/08; G11B7/135
Domestic Patent References:
| JP2006023430A | ||||
| JP2006084526A | ||||
| JP2017097934A |
Foreign References:
| WO2006006488A1 | ||||
| WO2008001573A1 |
Attorney, Agent or Firm:
Nobuo Fujimoto
Masuo Yamada
Keisuke Shigenobu
Masahiko Oi
Masuo Yamada
Keisuke Shigenobu
Masahiko Oi