Volumetric holographic data storage devices and volumetric holograms

The volumetric holographic data storage device according to any preceding claim, wherein the at least one volumetric holographic optical element includes a first and a second volumetric holographic optical element, and

• wherein the first and second volumetric holographic optical elements are recorded in the same holographic optical element medium.

The volumetric holographic data storage device according to any preceding claim,

• further including a further volumetric holographic optical element,
• wherein the volumetric holographic data storage device is configured to record data in the volumetric holographic medium by diffracting light with the first and/or, if present, the second volumetric holographic optical element and diffracting light with the further volumetric holographic optical element to the volumetric holographic medium.

A volumetric holographic data storage device for recording data in a volumetric holographic medium,

• the volumetric holographic data storage device including an arrangement for projecting an image containing data onto a random phase mask such that the image can be recorded in the volumetric holographic medium.

A volumetric holographic data storage device for recording data in a volumetric holographic medium and/or reading data from a volumetric holographic medium,

• the volumetric holographic data storage device including at least one optical fibre for carrying a signal beam and/or a reference beam.

A volumetric holographic data storage device for recording data in a volumetric holographic medium,

• wherein the data storage device is configured to record data in the volumetric holographic medium by passing light (such as coherent monochromatic light, e.g. laser light) through or reflecting light (such as coherent monochromatic light, e.g. laser light) off a Spatial Light Modulator and/or a digital micromirror device (DMD) to the volumetric holographic medium,
• and wherein between the Spatial Light Modulator and/or a digital micromirror device (DMD) and the volumetric holographic medium the image is compressed by a factor of at least 10−2, 10−3, 10−4, 10−5, or 10−6.

A volumetric holographic data storage device for recording data in a volumetric holographic medium,

• wherein the data storage device is configured to record data in the volumetric holographic medium in at least a first data page and a second data page,
• and wherein the first data page and the second data page include identical data.

A volumetric holographic data storage device for reading data from a volumetric holographic medium,

• wherein the volumetric holographic data storage device is configured to read data from at least a first data page and a second data page of the volumetric holographic medium,
• and wherein data storage device is configured to verify accurate reading of the data by comparing data from the first data page and data from the second data page.

A volumetric holographic data storage device for reading data from a volumetric holographic medium,

• wherein the volumetric holographic data storage device is configured to read data from a volumetric holographic medium by illuminating the volumetric holographic medium by diffracting light with a volumetric holographic optical element.

A volumetric hologram including a volumetric holographic medium, the volumetric holographic medium including an interference structure which when illuminated displays a projection of a data page information on a hologram or random phase mask.

A volumetric hologram including a volumetric holographic medium, the volumetric holographic medium including an interference structure which when illuminated displays at least a first data page and a second data page,

• and wherein the first data page and the second data page include identical data.

A volumetric hologram including a volumetric holographic medium, the volumetric holographic medium including at least a first interference structure which when illuminated displays a first data page and a second interference structure which when illuminated displays a second data page,

• and wherein the first data page and the second data page include identical data.

Use of a Holographic Optical Element in data storage.