Hologram recording device

Patent metadata

Field	Value
Publication number	US-2017269549-A1
Application number	US-201615226193-A
Country	US
Kind code	A1
Filing date	Aug 2, 2016
Priority date	Mar 18, 2016
Publication date	Sep 21, 2017
Grant date	—

Abstract

A hologram recording device includes a light outputting unit, which sequentially outputs laser beams having different wavelengths such that the laser beams are coaxial and includes an optical member and laser beam sources, and a recording unit, which sequentially irradiates the recording medium with the laser beams to record holograms in a multiwavelength superimposing manner. The optical member includes optical elements that reflect, in the optical direction, a laser beam incident thereon in a direction crossing the optical axis direction, and that allow a laser beam incident thereon in the optical axis direction to pass therethrough. The laser beam sources radiate laser beams to the optical member, and are arranged so that a laser beam emitted from a laser beam source among the laser beam sources that exposes a recording medium for a longer exposure period with the laser beam passes through a smaller number of optical elements.

First claim

What is claimed is:

1 . A hologram recording device comprising:
a light outputting unit that sequentially outputs a plurality of laser beams having different wavelengths such that the laser beams are coaxial with one another, the light outputting unit including
an optical member that includes a plurality of optical elements arranged in an optical axis direction, the optical elements reflecting, in the optical direction, a laser beam incident thereon in a direction crossing the optical axis direction, and the optical elements allowing a laser beam incident thereon in the optical axis direction to pass therethrough, and
a plurality of laser beam sources that emit a plurality of laser beams having different wavelengths, that radiate the laser beams to the optical member, and that are arranged so that a laser beam emitted from a laser beam source among the laser beam sources that exposes a recording medium for a longer exposure period with the laser beam passes through a smaller number of optical elements; and
a recording unit that sequentially irradiates the recording medium with the laser beams, which have different wavelengths and are sequentially output from the light outputting unit so as to be coaxial with one another, for use as recording beams to record a plurality of holograms in a multiwavelength superimposing manner.

2 . The hologram recording device according to claim 1 , wherein the exposure period is an exposure period required to acquire a white hologram by additive mixing when a laser beam does not cause an optical loss after passing through a corresponding number of optical elements.

3 . The hologram recording device according to claim 1 ,
wherein the light outputting unit includes
a first optical element that reflects, in the optical axis direction, a laser beam incident thereon in a first direction, the first optical element allowing a laser beam incident thereon in the optical axis direction to pass therethrough and outputting the laser beam,
a second optical element that reflects, in the optical axis direction, a laser beam incident thereon in a second direction and causes the laser beam to be incident on the first optical element, the second optical element allowing a laser beam incident thereon in the optical axis direction to pass therethrough and causing the laser beam to be incident on the first optical element,
a first laser beam source that causes a laser beam to be incident on the first optical element in the first direction,
a second laser beam source that causes a laser beam to be incident on the second optical element in the second direction, and
a third laser beam source that causes a laser beam to be incident on the second optical element in the optical axis direction, and
wherein the exposure period for which the recording medium is exposed with a laser beam emitted by the third laser beam source is greater than the exposure period for which the recording medium is exposed with a laser beam emitted by the second laser beam source and the exposure period for which the recording medium is exposed with a laser beam emitted by the second laser beam source is greater than the exposure period for which the recording medium is exposed with a laser beam emitted by the first laser beam source.

4 . The hologram recording device according to claim 2 ,
wherein the light outputting unit includes
a first optical element that reflects, in the optical axis direction, a laser beam incident thereon in a first direction, the first optical element allowing a laser beam incident thereon in the optical axis direction to pass therethrough and outputting the laser beam,
a second optical element that reflects, in the optical axis direction, a laser beam incident thereon in a second direction and causes the laser beam to be incident on the first optical element, the second optical element allowing a laser beam incident thereon in the optical axis direction to pass therethrough and causing the laser beam to be incident on the first optical element,
a first laser beam source that causes a laser beam to be incident on the first optical element in the first direction,
a second laser beam source that causes a laser beam to be incident on the second optical element in the second direction, and
a third laser beam source that causes a laser beam to be incident on the second optical element in the optical axis direction, and
wherein the exposure period for which the recording medium is exposed with a laser beam emitted by the third laser beam source is greater than the exposure period for which the recording medium is exposed with a laser beam emitted by the second laser beam source and the exposure period for which the recording medium is exposed with a laser beam emitted by the second laser beam source is greater than the exposure period for which the recording medium is exposed with a laser beam emitted by the first laser beam source.

5 . The hologram recording device according to claim 3 ,
wherein the first laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color blue, the second laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color red, and the third laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color green.

6 . The hologram recording device according to claim 4 ,
wherein the first laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color blue, the second laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color red, and the third laser beam source is a laser beam source that emits a laser beam of a wavelength corresponding to a color green.

Assignees

• Fuji Xerox Co Ltd

Inventors

• Nakamura Shigetoshi
• Minabe Jiro
• Ogasawara Yasuhiro

Classifications

• G03H2001/266

  Wavelength multiplexing · CPC title

• G03H2222/18

  RGB trichrome light · CPC title

• G03H1/28

  superimposed holograms only · CPC title

• G03H2001/2695

  Dedicated printer · CPC title

• G03H2222/34

  Multiple light sources · CPC title