Patent
Hologram recording device
TLDR
In this paper, a hologram recording device is provided with a plurality of optical elements (20p, 20p’) which can be in two statuses, i.e., in on-mode where the reference beam is transmitted or reflected in a prescribed direction toward the HMD, and in off-mode when the reference beacon is guided outside the prescribed direction or blocked.Abstract:
A hologram recording device records hologram in a hologram recording medium by splitting a coherent beam outputted from a beam source into a signal beam and a reference beam, irradiating the hologram recording medium with the signal beam by modulating the signal beam by a spatial light modulator, and by irradiating the hologram recording medium with the other reference beam to have the reference beam overlap the signal beam. The hologram recording device is provided with a plurality of optical elements (20p, 20p’) which can be in two statuses, i.e., in on-mode wherein the reference beam is transmitted or reflected in a prescribed direction toward the hologram recording medium, and in off-mode where the reference beam is guided outside the prescribed direction or blocked. Each of the optical elements (20p, 20p’) is provided with an optical phase modulating means which generates prescribed phase differences (0, π), and a phase modulation control means which controls each of the optical elements (20p, 20p’) to be in the on-mode or off-mode and modulates the reference beam to a beam having a prescribed phase pattern.read more
Citations
More filters
Patent
Laser machining device and laser machining method
TL;DR: In this article, a laser machining device is provided with a laser light source, a spatial light modulator, a driving unit, a control unit, and a condensing optical system.
Patent
High-speed wavefront optimization
Rafael Piestun,Donald B. Conkey +1 more
TL;DR: In this paper, a binary off-axis hologram is encoded by selective adoption of states for each mirror of a deformable mirror device, which is illuminated with an incident beam of light.
Patent
Gas-sensitive sensor made of palladium hybridization ferroferric oxide nanometer material
Wei Qin,Du Bin,Zhai Qingfeng,Wu Dan,Yong Zhang,Liangguo Yan,Li He,Luo Chuannan,Ma Hongmin,Yu Haiqin,Zhu Baocun,Wei Cao,Sun Meng,Zhu Peihua,Fan Dawei,Yongfang Zhang +15 more
TL;DR: In this article, a gas-sensitive sensor made of a palladium hybridization mesoporous ferroferric oxide nanometer material has been developed for detection of organic gas.
Patent
System and method for autostereoscopic imaging using holographic optical element
TL;DR: In this article, a holographic optical element (HOE) is recorded using coherent light divided into diverging reference and object beams that illuminate the HOE from opposite sides, and the object beam passes through first and second diffusers with one diffuser being a directional diffuser.
Patent
System and Method for Autostereoscopic Imaging
TL;DR: In this article, a holographic optical element made by preparing a silver halide gelatin emulsion, coating one side of a glass substrate with the emulsion and holographically recording an eyebox on the coated glass substrate using at least three wavelengths of coherent light combined in a source beam that is divided into a reference beam and object beam with at least one of the reference and object beams passing through a beam shaping device to substantially uniformly illuminate the glass substrate from opposite sides.
References
More filters
Patent
System and method for replicating volume holograms
Richard L. Sutherland,John Sappington,Donna M. Brandelik,Stephen A. Siwecki,Christina K. Shepherd,R. T. Pogue +5 more
TL;DR: In this article, an improved method of contact printing employs a polymer-dispersed liquid crystal (PDLC) recording medium as the duplication blank and/or the master hologram material.
Patent
Hologram recording method and hologram recording device
Jiro Minabe,Katsunori Kawano,Yasuhiro Ogasawara,Koichi Haga,Shin Yasuda,Kazuhiro Hayashi,Hisae Yoshizawa,Makoto Furuki +7 more
TL;DR: In this article, a method for recording information of signal light as holograms in an optical recording medium, which includes illuminating signal light at the optical medium, and shifting a region in the recording medium at which the signal light and the reference light intersect, by shifting an illumination position of the reference beacon along an optical axis of the signal beacon.
Patent
Optical information recording/reproduction device and method
TL;DR: In this paper, an optical information recording device includes a first spatial light modulator (I) for spatially modulating light from a light source (143) by a plurality of pixels so as to generate information light and a second spatial light modulation (R) to generate reference light.
Patent
Holographic memory with fringe stabilizing compensation for recording medium motion
Isao Satoh,Makoto Kato +1 more
TL;DR: In this article, a holographic recording system consisting of a pair of aligned first and second Fourier transforming lenses, a beam splitter having a series of random phase illumination holograms at a front focal plane of the first lens and arranged to move in a given direction to successively receive a light beam for deffracting it into a zero-order diffracted beam and a first order diffracted array of sampled, phase shifted beams, and a mask having a first-and second apertures disposed at the Fourier transform plane of a first lens.
Patent
Apparatus and method for recording and reproducing optical information
TL;DR: In this paper, an input device is used to input individual information which is unique to an individual, and a phase modulation pattern is generated based on the individual information using a phase modulator for spatially modulating a phase of the reference light.