| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359035000 | Hardware for producing a hologram | 11 |
| 20080231927 | APPARATUS AND METHOD TO STORE INFORMATION IN A HOLOGRAPHIC DATA STORAGE MEDIUM - A method is disclosed to store information in a holographic data storage medium. The method provides a hologram comprising an alignment pattern, and disposes that hologram into a holographic data storage medium during manufacture. | 09-25-2008 |
| 20080304122 | HOLOGRAM RECORDER - A hologram recorder (A) records holograms in a selected unit recording area (B | 12-11-2008 |
| 20090002790 | System and method for manipulating and processing materials using holographic optical trapping - An apparatus for manipulating particles (micro, nano, and pico) having one or more characteristics with an optical trap formed by modulating a laser beam with a Diffractive Optical Element (DOE). At least one characteristic of the material is selected; and a laser beam having a selected wavelength corresponding to the at least one selected characteristic of the material is generated. Values of the DOE are calculated corresponding to the at least one selected characteristic of the material. The beam and the DOE are modulated to produce a holographic optical trap having properties corresponding to the at least one selected characteristic; the trap is focused to a beam focus or selected spot size; and the beam focus is located near a particle location for trapping the particle therein. | 01-01-2009 |
| 20090040582 | System and method for holographic storage - A system and a method for holographic storage mainly involve forming a holographic interference pattern in a holographic recording medium. The holographic storage system utilizes a light source to emit a coherent beam. The coherent beam is irradiated to a first reflector to form a divergent beam. The divergent beam is then irradiated to a second reflector to form collimating beams (a signal beam and a reference beam). The signal beam goes through a spatial light modulator (SLM) and is modulated by the SLM. After that, the reference beam and the modulated signal beam are irradiated to a convergent unit, and are directed to the holographic recording medium for forming the holographic interference pattern. The holographic storage system that the light source is split into a signal beam and a reference beam by a set of reflectors according to the reflection principle without involving refraction may employ wavelength multiplexing. | 02-12-2009 |
| 20090059330 | OPTICAL APPARATUS - An optical apparatus includes: a focusing lens that focuses light which is one of recording light being irradiated to an optical recording medium with reference light for recording a hologram and reference light being irradiated to an optical recording medium for reading out a hologram; and a focal position-shifting unit that refracts the light while moving in accordance with a moving speed of the optical recording medium, so as to shift a focal position of the light in the optical recording medium a distance in a thickness direction of the optical recording medium. | 03-05-2009 |
| 20090086299 | APPARATUS AND METHOD TO ENCODE INFORMATION HOLOGRAPHICALLY - A method to encode information holographically, wherein the method provides information, and generates a plurality of data images, wherein each data image comprises a portion of the information. The method holographically encodes each of the plurality of data images in a holographic data storage medium, generates a plurality of identifiers, and associates a different one of the plurality of identifiers with a different one of the plurality of data images. The method forms a directory image reciting each of plurality of identifiers, encodes the directory image in a non-holographic data storage medium, and holographically encodes the directory image in the holographic data storage medium. | 04-02-2009 |
| 20090122376 | Optical Information Recorder (Reflection Holographic Memory Device) - A holographic memory in which a disk recording medium having a mechanism for operating an optical pick-up system is used, signal and reference light beams are so coaxially directed as to be opposed, the polarization planes of the signal with each other on the disk recording medium and which is well compatible with existing techniques and high in cost performance when manufactured as a product. The reflection holographic memory comprises random-phase modulation multiplex recording means disposed in the light guide of the signal and/or reference light beams and a spatial-shift multiplex recording means so as to increase the recording capacity. Signals are recorded in the thickness direction of the disk so as to further increase the recoding capacity. That is, by combining random-phase modulation multiplex recording and spatial-shift multiplex recording, the recording density is enhanced tens to hundreds times to improve the recording capacity of multilayer type by using a micro recording area of the reflection hologram. Simultaneously, the encryption effect can be produced by the random-phase modulation multiplex recording. | 05-14-2009 |
| 20100033785 | DIFFRACTIVE DISPLAY DEVICE, FINDER DEVICE AND CAMERA - There is provided a diffractive display device having small non-uniformity of luminance within a surface, and a finder device and a camera using the diffractive display device. The diffractive display device includes a pair of substrates | 02-11-2010 |
| 20110032588 | METHOD AND SYSTEM FOR PRODUCING MULTIPLE IMAGES IN A SINGLE IMAGE PLANE USING DIFFRACTION - Methods create images viewable under different selected angels on optical storage devices and other photosensitive surfaces and optical storage devices with super-imposed images. Generally, a photosensitive surface is exposed with multiple diffraction patterns creating super-imposed images. These diffraction patterns create super-imposed images on the photosensitive surfaces, which can be read by either a human or a computer. | 02-10-2011 |
| 20120224237 | HOLOGRAPHIC RECORDING SYSTEM HAVING A RELAY SYSTEM - According to one aspect and example, a holographic recording system includes a light source, an object for modulating an object beam from the light source, and a relay system adapted to magnify (positive or negative) the modulated beam (e.g., an image of the object) to an output image. The object may include an SLM operable to modulate the object beam with an information layer comprising a plurality of data pages. The output image is directed to the holographic storage medium, where a reference beam is also directed, to record the resulting interference pattern. Additionally, the relay system converges the output image to an output Fourier plane, which may be disposed within the holographic storage medium. A filter may be placed at an intermediate Fourier plane located prior to the output Fourier plane, and a phase mask may be placed at the position of the output image. | 09-06-2012 |
| 20120287491 | METHOD FOR FINDING AND TRACKING SINGLE-MODE OPERATION POINT OF EXTERNAL CAVITY DIODE LASERS - An apparatus comprising: a processor for determining if a laser is operating in a single-mode state and for determining the degree to which one of one or more tunable parameters for the laser must be adjusted so that laser operates in a single-mode state if not operating in a single-mode state, wherein the one or more tunable parameters include the following parameters: the laser current and the wavelength of the output light. The apparatus may include a laser and/or a holographic storage medium. Also provided is a method for determining if a laser is operating in a single-mode state and for determining the degree to which one of one or more tunable parameters for the laser must be adjusted so that laser operates in a single-mode state if not operating in a single-mode state. | 11-15-2012 |
