Process for making phase holograms
An object of this invention is to provide a process for making phase holograms which has the advantages of the bleached silver halide type process and the hardened dichromated gelatin type process wit... Read More
Inventors: Gladden, James W.;, Assignee: The United States of America as represented by the Secretary of the Army (Washington, DC) |
Recording/reproducing system using phase encoding of optical storage medium
Therefore, it is an object of the present invention and of my earlier filed co-pending applications Ser. No. 07/410,943 and Ser. No. 07/614,627 to provide an optical storage system for increasing the ... Read More
Inventors: Russell, James T.;, Assignee: |
Method and apparatus for multiplexing data in different planes of incidence of a thin holographic storage media
The present invention disclosed and claimed herein comprises a holographic recording system. The holographic recording system includes the holographic storage media having recording regions defined th... Read More
Inventors: Redfield, Stephen Roger; Trisnadi, Jahja Irwanto;, Assignee: Tamarack Storage Devices (Austin, TX) |
System and method for steering fresnel region data to access data locations in a holographic memory
To address the above-discussed deficiencies of the prior art, the present invention provides systems and methods for steering a complex, spatially-modulated incident beam of coherent light to gain acc... Read More
Inventors: Campbell, Scott Patrick; Curtis, Kevin Richard; Tackitt, Michael C.;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Method and apparatus for holographic data storage system
The invention is based on the novel and unobvious use of feedback in a holographic memory system to facilitate access to information in a stored data page. The feedback of the invention can provide co... Read More
Inventors: Campbell, Scott Patrick; Curtis, Kevin Richard; Richardson, Thomas J.;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Data carrier having an optically variable element and methods for producing it
What is claimed is: 1. A system comprising a series of data carriers which are manufactured and thereafter issued for use, each of the data carriers having a body provided with a multilayer, optically... Read More
Inventors: Heckenkamp, Christoph; Kaule, Wittich; Stenzel, Gerhard;, Assignee: GAO Gesellschaft fur Automation und Organisation mbH (Munich, DE) |
Image scanner
OF THE PREFERRED Embodiment The main characteristic of the image scanner of the present invention is that it may optionally decide to proceed reflection document scanning or transmission document sca... Read More
Inventors: Fang, Po-Hua; Huang, Yin-Chun;, Assignee: |
Apparatus for executing light control operations in a bidirectional film printer
The present invention concerns apparatus for use with a film printer that executes light control operations during bidirectional transport of a master film and a raw film to transfer to the raw film f... Read More
Inventors: Wohlrab, Hans Chr;, Assignee: PSC Technology Inc. (Glendale, CA) |
Holographic optical apparatus for use with expanded-beam type fiber optical components
OF THE PREFERRED EMBODIMENT This invention in general relates to apparatus by which two or more optical fibers can be optically connected in predetermined ways and in particular to apparatus employin... Read More
Inventors: Fantone, Stephen D.;, Assignee: Polaroid Corporation (Cambridge, MA) |
Optical fiber connector having integral electrodes for use in fusion splicing
We claim: 1. A fiber optic connector comprising: (a) a ferrule having walls defining an interior splice chamber and first and second bores forming fiber-receiving paths extending from the splice chamb... Read More
Inventors: Munn, Robert D.; Stilwell, Jr., George R.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Method for extending life of optically recorded information
I claim: 1. A method for extending the life of optically recorded information comprising, recording information on a non-delete optical information storage medium by creating information data spots wi... Read More
Inventors: Drexler, Jerome; Bouldin, Eric W.;, Assignee: Drexler Technology Corporation (Mountain View, CA) |
Single laser direct read after write system (draw)
In the apparatus of the present invention a laser outputs a single beam to a grating which grating separates the beam into two parallel spaced-apart beams that are directed to a folding mirror and to ... Read More
Inventors: Barnard, James A.;, Assignee: Eastman Kodak Company (Rochester, NY) |
Control apparatus for a recording medium drive motor in a digital information reproducing apparatus
Accordingly, it is an object of the present invention to provide a control apparatus for a recording medium drive motor in a digital information reproducing apparatus in which the rotation of a record... Read More
Inventors: Inagawa, June; Kojima, Tadashi;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Mark sense detector with variable threshold
It is an object of the invention to provide a mark sense reader especially adapted to reading hand written marks, using a dynamically variable threshold technique rendering the reader insensitive to s... Read More
Inventors: D'Onofrio, Enzo D.;, Assignee: GTECH Corporation (West Greenwich, RI) |
Track access and laser beam alignment system for an optical recording and reproduction apparatus
An object of the present invention is to provide an optical memory system wherein the number of guide grooves through which a light beam has actually passed can be counted even in the course of access... Read More
Inventors: Fujiwara, Tsuneo; Nomura, Masaru; Deguchi, Toshihisa; Kojima, Kunio; Yamaguchi, Takeshi;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Optical card reading and writing method with redundant directory storage to improve reliability
The present invention has for its object to provide a novel and useful method of recording and/or reproducing information on and/from an optical record medium, in which the reliability of the informat... Read More
Inventors: Mikamo, Noboru;, Assignee: Olympus Optical Co., Ltd. (Tokyo, JP) |
Strontium barium niobate single crystal doped with Ce
An object of the present invention is to provide an optical element which overcomes the above-mentioned difficulties in the prior art and has a high sensitivity with respect to photo-induced refractiv... Read More
Inventors: Megumi, Koichi; Kozuka, Hirotsugu; Kobayashi, Masayoshi; Furuhata, Yoshio;, Assignee: Hitachi, Ltd. (JP) |
Polycrystalline ferroelectric fiber
What is claimed is: 1. An inorganic, polycrystalline, ferroelectric fiber with a diameter of from about 1 micron to 1 millimeter, a porosity of less than about 40 percent, a density of at least about ... Read More
Inventors: Seth, Vinay K.;, Assignee: Alfred University (Alfred, NY) |
Photosensitive composition for volume hologram recording
OF THE INVENTION In the present specification, a cationic photopolymerization initiator composition which shows "low photosensitivity" to a laser beam or a light having excellent coherence means thos... Read More
Inventors: Kawabata, Masami; Sato, Akihiko; Sumiyoshi, Iwao;, Assignee: Nippon Paint Company, Ltd. (Osaka-fu, JP) |
Data recording/reproducing device
The present invention provides a data recording/reproducing device which has accurate re-synchronization in recording or reproducing data by an edge recording method. The present invention also has ac... Read More
Inventors: Mizokami, Takuya; Saito, Atsushi; Yoshida, Naozane; Sekine, Takehiko;, Assignee: Hitachi, Ltd. (Tokyo, JP); Hitachi Video Engineering, Incorporated (Yokohama, JP) |
System and method using linear translation to access data locations in a holographic memory
To address the above-discussed deficiencies of the prior art, the present invention provides systems and methods for steering a complex, spatially-modulated incident beam of light from a spatial light... Read More
Inventors: Campbell, Scott Patrick; Curtis, Kevin Richard; Tackitt, Michael C.;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Scanning device
The scanning device of the present invention scans an original which is set at a predetermined position and has information recorded thereon. The present scanning device comprises: a plurality of ligh... Read More
Inventors: Aikawa, Toshiya; Tazawa, Masashi; Fujinawa, Nobuhiro;, Assignee: Nikon Corporation (Tokyo, JP) |
Method and apparatus for implementing high density recording on a recording medium and a method of manufacturing same
Accordingly, it is the object of the present invention to provide an optical head and optical disk apparatus which are capable of high density recording on a recording medium and enhancing the size mi... Read More
Inventors: Ueyanagi, Kiichi;, Assignee: Fuji Xerox Co., Lt.d. (Tokyo, JP) |
Article comprising silica-based glass containing aluminum and phorphorus
We have discovered that co-pending fused silica with Al and P, in approximately equimolar amounts, can leave the refractive index of the silica substantially unchanged or even result in a lowering of ... Read More
Inventors: Lemaire, Paul J.; MacChesney, John B.; Simpson, Jay R.;, Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories (Murray Hill, NJ) |
Method for removing sulfate ions from aqueous solution of alkali metal chloride
OF THE INVENTION The present invention relates to a method for removing sulfate ions from brine, wherein the brine containing sulfate ions and zirconium hydrous oxide are brought into contact with ea... Read More
Inventors: Shiga, Minoru; Kano, Toshiji; Kishi, Takamichi;, Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha (Osaka, JP) |
Method of forming volume phase reflection holograms
Embodiments of the present invention are volume phase reflection (VPR) holograms which can be replicated without using an on-line laser exposure or subsequent chemical processing steps. Further, the r... Read More
Inventors: Cowan, James J.;, Assignee: Polaroid Corporation (Cambridge, MA) |
Optical sight
OF THE DRAWINGS The apparatus according to the invention will be described in greater detail in connection with the accompanying drawings in which FIG. 1 shows an embodiment of an optical sight utili... Read More
Inventors: Wiklund, Klas Rudolf;, Assignee: AGA Aktiebolag (Lidingo, SW) |
Off axis optical sight system for a firearm
What is claimed is: 1. An off axis optical sight system for a firearm such as a rifle especially designed to be effective in situations where a target is situated in a dim or dark area a substantial d... Read More
Inventors: Morris, Donald D.;, Assignee: |
Illuminated gunsight
This invention comprises an illuminated gunsight for shooting in the dark that provides its own light source, conforms to conventional sight posts and sighting methods, switches on automatically as th... Read More
Inventors: Santiago, Julio A.;, Assignee: |
Improved adjustment means for sighting instrument
What is claimed is: 1. An optical sighting instrument, comprising: a tubular lens housing having front and rear apertures; a lens mounted within said lens housing and having a concave light reflecting... Read More
Inventors: Ekstrand, Per-Olof S.;, Assignee: |
Optical Systems 
