PatentDOI
Holographic storage using shift multiplexing
TLDR
In this article, the authors present a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least one first axis with a separation angle between adjacent waves and directing the fan of the M waves as a reference beam along a reference path onto the recording medium.Abstract:
The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent waves and directing the fan of M waves as a reference beam along a reference beam path onto the recording medium, successively modulating a wave with a succession of images to produce a succession of signal beams along a signal beam path lying at a propagation angle relative to the reference beam path so that the signal and reference beams intersect at a beam intersection lying within the medium, the beam intersection having a size corresponding to beam areas of the reference and signal beams, producing a succession of relative displacements in a direction parallel to the first axis between the recording medium and the beam intersection of the signal and reference beam paths in synchronism with the succession of signal beams, each of the displacements being less than the size of the intersection whereby to record successive holograms partially overlapped along a direction of the displacements.read more
Citations
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Patent
Focal plane coding for digital imaging
TL;DR: In this article, an imaging system includes an array of lenses, a plurality of sensor pixels for each lens, the sensor pixels being on an image plane of the imaging system, and a corresponding plurality of focal plane coding elements.
Journal ArticleDOI
Shift Selectivity and Hologram Playback Margin Dependence on the Average Speckle Size of a Randomly Phase Encoded Reference Beam
TL;DR: In this article, several important hologram reconstruction parameters of shift multiplexing with a randomly phase encoded reference beam were investigated as functions of the reference beam average speckle size at the medium.
Journal ArticleDOI
Optical design for page access to volume optical media.
Mark A. Neifeld,Mark McDonald +1 more
TL;DR: It is found that a parallelism of ≥ 10(5) bits per page and a crystal information density of ≈2 Mbits/mm(3) are achievable with standard optical elements and that advanced designs offer significant improvements.
Journal ArticleDOI
Error-free reconstruction of magnetic hologram via improvement of recording conditions in collinear optical system
Yuichi Nakamura,Zen Shirakashi,Hiroyuki Takagi,Pang Boey Lim,Taichi Goto,Hironaga Uchida,Mitsuteru Inoue +6 more
TL;DR: The results indicate that magnetic holograms can potentially be utilized as holographic memory and modify the shape of the reference beam to ensure more effective interference.
Patent
Holographic recording techniques using reference zone of spatial light modulator
TL;DR: In this paper, a spatial light modulator is used to create the data encoded object beam and the reference beam, which are then used to interfere in a holographic medium to record a hologram.
References
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Journal ArticleDOI
Angle-multiplexed storage of 5000 holograms in lithium niobate.
TL;DR: As many as 5000 holograms of high-resolution images have been stored within a single crystal of Fe:LiNbO3 using fracture-space multiplexing to increase the storage bandwidth.
Journal ArticleDOI
Optical data storage by using orthogonal wavelength-multiplexed volume holograms
TL;DR: A volume holographic data storage scheme that employs counterpropagating reference and image beams and wavelength multiplexing for page differentation and a reduction in holographic cross talk is predicted.
Journal ArticleDOI
Volume hologram multiplexing using a deterministic phase encoding method
TL;DR: A novel phase encoding method using deterministic orthogonal phase codes in a reference-based multiplexing technique is obtained that is able to retrieve multiple images with high diffraction efficiency without energy losses, adjustment problems or any time delay.
PatentDOI
Method for holographic storage using peristrophic multiplexing
TL;DR: A method of multiplexing holograms by rotating the material or, equivalently, the recording beams is described, and a total of 295 holograms in a 38-microm-thick photopolymer film is multiplexed by combining peristrophicmultiplexing with angle multiplexers.