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| Number | Title | Issue Date |
| 7372202 | Phase locked microdischarge array and AC, RF or pulse excited microdischarge The invention is directed to a method and apparatus for phase-locking microdischarge device arrays and an ac, rf, or pulse-excited microdischarge. The invention provides output from a non-laser optical source that is a phase-locked array of microdischarges formed of... | 05/13/2008 |
| 7339668 | Spectrometer for analysis of multiple samples A spectrometer (100) includes a light source (102) providing output light (106) to the bundled input ends (108) of multiple light pipes (110). The light pipes (110) branch into sets (118) between their input ends (... | 03/04/2008 |
| 7215457 | Apparatus and methods for modulating refractive index An iono-refractive structure that includes one or more ion insertion layers having a real portion and an imaginary portion of the dielectric constant is provided. While both the real portion and the imaginary portion of the dielectric constant change, the change in ... | 05/08/2007 |
| 7202984 | Double faced double storage capacity medium A first holographic data storage device has a first set of holograms stored thereon. A second holographic data storage device has a second set of holograms stored thereon. An opaque layer is disposed between and attached to one side of the first and the second holog... | 04/10/2007 |
| 7151623 | Holographic data-storage medium In an example holographic data storage medium, which has a polymer film which serves as a storage layer and can be changed locally by heating, the polymer film is set up as a top layer of the data storage medium. Arranged underneath the polymer film is an absorber l... | 12/19/2006 |
| 7145709 | Apparatus and methods for modulating refractive index An iono-refractive structure that includes one or more ion insertion layers having a real portion and an imaginary portion of the dielectric constant is provided. While both the real portion and the imaginary portion of the dielectric constant change, the change in ... | 12/05/2006 |
| 7133171 | Double facing double storage capacity A first holographic data storage device has a first set of holograms stored thereon. A second holographic data storage device has a second set of holograms stored thereon. An opaque layer is disposed between and attached to one side of the first and the second holog... | 11/07/2006 |
| 7112359 | Method and apparatus for multilayer optical articles The present invention provides a method and apparatus for a multilayer optical articles. A method comprises forming a first multilayer article with a first substrate and a second substrate with a first adherent disposed between the first and second substrate. A firs... | 09/26/2006 |
| 7009750 | Apparatus and methods for modulating refractive index An iono-refractive structure that includes one or more ion insertion layers having a real portion and an imaginary portion of the dielectric constant is provided. While both the real portion and the imaginary portion of the dielectric constant change, the change in ... | 03/07/2006 |
| 6998195 | Device for registration of optical holograms on the amorphous molecular semiconductor films This invention relates to the field of holography, in particular to a method and a device for recording optical holograms by means of amorphous molecular semiconductor (AMS) films deposited on a glass substrate pre-covered with a transparent electric conducting sub-... | 02/14/2006 |
| 6998197 | Device for registration of optical holograms on the amorphous molecular semiconductor films This invention relates to the field of holography, in particular to a method and a device for recording optical holograms by means of amorphous molecular semiconductor (AMS) films deposited on a glass substrate pre-covered with a transparent electric conducting sub-... | 02/14/2006 |
| 6611612 | Security reader for automatic detection of tampering and alteration A document (10) is covered by a laminate (13) comprising a layer of microspheres (16) over an adhesive layer (14) covering a source image (12) such as a photograph, printed matter, or a bar code arranged on a substrate (11). Light impinging on the documen... | 08/26/2003 |
| 6558851 | Optical medium for registration of holographic interferograms This invention relates to the photo-sensitive thermoplastic top-layer of optical media for registration of holograms, where the media consists of three transparent layers where the bottom layer is a glass substrate, the mid layer is an electro-conductive ... | 05/06/2003 |
| 6473208 | Two-color holographic recording apparatus A two-color holographic recording apparatus reduces error signals possibly included in reproduced digital data signals. The two-color holographic recording apparatus has first, second and third light shutters for passing or blocking gate light, signal lig... | 10/29/2002 |
| 6366278 | Camera system A picture recording device includes at least one photodetector for each picture element to be recorded before which one focusing element is arranged for forming an image of each element of the picture to be recorded on the photodetector. The picture recor... | 04/02/2002 |
| 6363097 | Semiconductor laser with a rewritable wavelength stabilizer A semiconductor laser with a rewritable wavelength stabilizer which comprises a laser mirror made of a grating written into a photorefractive material, in which the oscillation wavelength of the laser diode is determined by the period of the grating. This... | 03/26/2002 |
| 6156415 | Method for fabricating a multilayer optical article and a system having a multilayer optical article A method for fabricating an article, comprising the steps of grasping an outer surface of a first substrate with a first holder, whereby the outer surface of the first substrate is held to an inner surface of the first holder; grasping an outer surface of... | 12/05/2000 |
| 5920409 | Optoelectronic devices using persistent photoconductivity A compound semiconductor that is suitably doped to exhibit the DX effect is irradiated with an optical beam of spatially varying intensity whereby localized regions of persistently higher conductivity and lower refractive index are created in the semicond... | 07/06/1999 |
| 5903648 | Method and apparatus for encryption A method and apparatus of encrypting optical images and storing these images in memory using random phase encoding is presented. The encryption technique uses random phase encoding in both the input plane and the Fourier plane. Each image is encrypted and... | 05/11/1999 |
| 5569565 | Hologram recording material A hologram recording device, which comprises a recording layer of a polymer composition a photoconductive element, a second-order super-polarization element and an electron or hole capturing material and having a non-centro symmetric structure is disclose... | 10/29/1996 |
| 5539542 | Photorefractive device having an electro-optical material between two photoconductive materials A photorefractive apparatus is exposed to a write beam or radiation for creating a system of interference fringes in the apparatus, as well as to a read beam or radiation which diffracts the system created and includes at least one elementary pattern (1) ... | 07/23/1996 |
| 5497254 | Optical apparatus including a liquid crystal modulator An optical apparatus for controlling a wave front of a coherent light including at least a coherent light source, an electrically addressable liquid crystal device having a plurality of pixels receiving the light from said light source, and a signal gener... | 03/05/1996 |
| 5258860 | Optical phase adder A photosensitive element 46 absorbs at least a portion of an incident write beam 40, causing a spatially varying electric field to be applied across a layer of a ferroelectric liquid crystal (FLC) 48, thereby forming a pattern of local polarizations corre... | 11/02/1993 |
| 5132811 | Holographic operating optical apparatus A holographic apparatus has an inferometer for concurrently irradiating an image recording medium by a writing reference light of spherical or plane wave form and a signal light containing image information which interfere with each other to form a hologr... | 07/21/1992 |
| 5049963 | Holographic television apparatus with semiconductor device A holographic television apparatus is disclosed for detecting and displaying three-dimensional holographic information corresponding to a holographic optical interference pattern. The apparatus includes an image detecting device for successively detecting... | 09/17/1991 |
| 4831244 | Optical record cards Various configurations of rectangular optical information storage card include an information surface arranged in a generally concentric and/or spiral format so that the information surface can be read as the card is rotated. Such configurations can inclu... | 05/16/1989 |
| 4542955 | Device for illuminating an electro-optical medium for recording holograms in real time The invention relates to electro-optical media which make it possible to record holograms in real time. It consists in using a lamina of a selected material such as bismuth-silicon oxide, this lamina being subjected to a transverse electric field perpendi... | 09/24/1985 |
| 4304458 | Arrangement for displaying deformations of deformable structures by holographic interferometry The arrangement for displaying deformations of deformable structures by holographic interferometry, in which the interferogramme of the object is obtained by double exposure for an object subjected to periodic deformation or by prolonged exposure by compa... | 12/08/1981 |
| 4252400 | Nondestructive dynamic controller for thermoplastic development A nondestructive dynamic controller for thermoplastic development is disclosed. The dynamic controller monitors the development of a hologram, without altering the charge pattern on the recording medium that is required for the development. The dynamic co... | 02/24/1981 |
| 4174881 | Recording a synthetic focused-image hologram on a thermally deformable plastic A synthetic focused image hologram of a white light image is recorded as variations in the depths of grooves of a diffraction grating in a layer of thermoplastic material located on a layer of photoconductive material. The thermoplastic layer is manufactu... | 11/20/1979 |
| 4124268 | Optical device for the storage and the selective erasure of information The object of the invention is to provide a device for storing and selectively erasing information in electrooptical photoconductive materials in which selective recording and erasure are obtained by identical optical devices which project the same distri... | 11/07/1978 |
| 4014603 | Method of holographic recording Disclosed are a method and apparatus for holographically recording a plurality of holograms on a recording material. The method comprises producing two coherent light beams, altering one of these beams by an information bearing object, causing the changed... | 03/29/1977 |
| 3997238 | Holographic recording process using a thermoplastic photosensitive member A holographic recording process uses a thermoplastic photosensitive member in which charging on the member and exposing the same to light having holographic information are carried out simultaneously, and an unevenness image corresponding to the informati... | 12/14/1976 |
| 3976354 | Holographic memory with moving memory medium In a holographic memory or a holographic recording system, one dimensional Fourier transform holograms are recorded on a moving memory medium. The one dimensional Fourier transform holograms have their elongated dimension oriented in a direction which is ... | 08/24/1976 |
| 3972716 | Color electrophotography using encoded multicolor information A system for electrostatic photography using a camera having an aperture formed in one side for imaging light onto a photoconductive insulating layer positioned and supported in the camera housing to permit formation of an electrostatic latent image on di... | 08/03/1976 |
