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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7150552 | Vehicle headlight The invention concerns a vehicle headlight, comprising a two-dimensional array (2) of a plurality of electronic light emitter elements (4), which are arranged for emitting a plurality of parallel light beams (6), a collection lens (8), wh... | 12/19/2006 |
| 7015944 | Device for improving visibility in vehicles The present invention relates to a device for improving visibility in a vehicle, especially in darkness, bad weather and fog, including one or more laser headlights radiating laser light of a wavelength outside the visible spectrum into a predetermined solid angle a... | 03/21/2006 |
| 6877879 | Process for improving the visibility in vehicles The invention concerns a process for improving the view in vehicles, in particular at night, poor weather and fog, in which laser light is emitted at a wavelength outside the visible spectrum in a predetermined angular range, which is being observed with a camera, o... | 04/12/2005 |
| 6863412 | Device for vehicle lighting A device for vehicle lighting includes a deviating prism which deflects a light beam by approximately 180 degrees from a direction of incidence in which the light beam is emitted by a light source. A reflector is also provided which deflects the light beam so that t... | 03/08/2005 |
| 6552342 | System for improving the visibility in vehicles A system for improving the visibility in vehicles, including the following: an illumination optical system (2) for continuous radiation of infrared pulsed light; an associated receiver optical system (3) for receiving reflected components of the radiated ... | 04/22/2003 |
| 6236520 | Lighting device for picture recording The invention relates to a device for picture recording that is used in image sensors in robotics, navigation and surveillance systems. Said device comprises a lighting device having several series connected lasers as a light source and a dispersing lens ... | 05/22/2001 |
| 4966430 | Semiconductor circuit An integrated semiconductor circuit arrangement composed of a substrate with an electrical portion, configured, for example, of an integrated circuit in planar CMOS or bipolar technology, an optical connecting layer disposed thereabove which includes at l... | 10/30/1990 |
| 4867520 | Optical fiber multiplexer An optical multiplexer is disclosed which comprises three waveguides, one for admitting or emitting light and two for receiving light. Each waveguide has an end face. One of the receiving waveguides has an optical layer on its end face which is disposed a... | 09/19/1989 |
| 4836644 | Fiber optic star coupler A fiber optic star coupler which is suitable, in particular, for monomode optical waveguides. This is realized by a multiple taper coupler configured as a hollow cylinder.... | 06/06/1989 |
| 4592619 | Optical coupling device An optical coupling element is provided between a semiconductor transmitter, a semiconductor receiver and a lightwave guide. The optical coupling is effected through microoptics which are adjustable in a simple way. Such a coupling element is useful parti... | 06/03/1986 |
| 4467276 | Arrangement for evaluating an optical beam A high-resolution Bragg-cell receiver for monitoring and/or analyzing the frequency of RF signals comprises a lightwave guide arrangement with discrete photodiodes coupled thereto which is substituted for a photodiode array. The guide has closely spaced i... | 08/21/1984 |
