Other

Messerschmitt-bolkow-blohm Gmbh

Eads Deutschland Gmbh

Daimler Chrysler Ag

Daimler-benz Ag

Messerschmitt-boelkow-blohm Gesellschaft MIT Beschraenkter Haftung

Daimler-benz Aerospace Ag

Micro Systems Design Dr. Altmann Gmbh

Messerschmitt-bogmbh

Thorsteinn Halldorsson

Heinrich Alexander Eberl

Horst Schmidt-Bischoffshausen

Helmut Grantz

Guenter Abersfelder

Stefan Uhl

Ernst A Seiffarth

Peter Peuser

Konrad Altmann

Ernst-August Seiffarth

Nikolaus Peter Schmitt

Paul Zeller

Sigmund Manhart

Helmut Seidel

Walter Kroy

Max Koniger

Axel Mehnert

Gerald Sobotta

Theo Tschudi

Michael Hofmann

Gunter Reithmeier

Hartmut Neumann

Palmi Petursson

Karin Bauer

Lingli Wang

Alois Seilmeier

Heinrich Graener

John Langerholc

Sigmnund Manhart

In the case of a method of detecting wind velocities by means of a Doppler-lidar system (), a laser beam of a defined frequency generated by means of a laser () is emitted by a transmitting device () toward a space area and the light backscattered from the space area is received by means of a receiving telescope (). For determining a Doppler shift, an interferogram is generated by means of an interferometer (), the intensity distribution of the interferogram being directly measured by means of a photodetector (). The measured intensity distribution is compared with one or more reference patterns which had previously been determined for defined parameters and are filed in a memory device (). From the comparison, the Doppler shift is determined as a measurement for the wind velocity. The Doppler-lidar system () comprises an analyzing unit () for implementing the method, having a comparison unit () for the comparison of reference patterns with the measured interferogram.

Method and apparatus for detecting wind velocities by means of a doppler-lidar system

In a method of producing video screen holograms, a real video screen is illuminated by means of a narrowband light for producing a hologram of the real video screen. A plurality of individual recordings is carried out, each covering only a partial area of the real video screen being imaged in the hologram. The individual recordings take place, for example, by means of a scanning pulsed laser beam. The individual recordings are assembled to form the video screen hologram of the entire video screen. A recording device for this purpose comprises a scanning device for guiding the light radiation over the video screen and a light source which generates pulsed light radiation. The light source is, for example, a laser system with a pulsed q-switched oscillator and with an optical parametric oscillator.

Method, device and laser system for producing screen holograms, and screen hologram

An imaging system for motor vehicles has a holographic screen, which scatters incident narrow band light at a predetermined solid angle, and a modulator and a lens to project images on the holographic screen. A holographic, transparent ray uniter, which allows broad band ambient light to pass through essentially unimpeded, guides the narrow band light, coming from the holographic screen to the viewer, whereby a virtual image is produced at the viewing location by means of an imaging function. Images from the outside of the motor vehicle are shot by means of a camera system and are faded as virtual images into the windshield of the motor vehicle in order to enable there additionally a view to the rear or to the side.

Image representation system and method for vehicles

The use of a holographic video screen which appears black, gray or colored in ambient light as the display surface in a vehicle, wherein a driver can view the screen while driving without taking his eyes of the road. Additionally, the display system containing such a video screen permits the projection and viewing of multiple images on a single screen.

Use of a holographic video screen as a display surface in a vehicle

A display unit for an information processing system comprises a holographic image generating system. The information processing system may be a computer, television, telephone or other information system. The display may also be used in a large format, including a matrix of individual units, for sports arenas, road signs and the like.

Use of a holographic video screen as a display surface for information systems

In an electronic image enhancement system, a reflex image is scanned in the interior of the eye. After modification by a processor, the image is projected back into the eye along the same path, and aligned in registration with the original scanned image. An elliptical scan pattern is used.

Method for improving optic perceptive faculty by modifying the retinal image

A system for stereoscopic image display includes a projection device ( ) with modulators ( ) and a polarization splitter prism ( ) for the projection of images with differing perspectives each with differing polarization directions. A holographic screen ( ) has a grid structure that corresponds to a hologram recording of actual screens with differing polarization directions. The incident light beams (A, B) have the effect that two differently polarized images are generated on the holographic screen ( ), where said images can be perceived separately by the left and the right eye by using eyeglasses ( ) with polarization filters.

System and method for stereoscopic imaging and holographic screen

A method for the elimination of image speckles in a scanning laser projection is suggested, in which a phase hologram is used for dividing the illumination beam of the projector into partial beams. The partial beams are heterodyned again on the image screen within the image element (pixels) to be projected in such a way that differing speckle patterns are formed which average each other out in the eye of the viewer over time and/or space. Thus, a device is provided especially for the laser projection which substantially eliminates or reduces the speckles at the viewer. However, the beam form and the beam density are hardly or not changed.

Method and device for eliminating image speckles in scanning laser image projection

A method for suppressing image speckles in a holographic screen is provided in which the screen is illuminated in the hologram in a plurality of individual steps, changing the recording parameters at each step. As a result, a holographic screen is obtained that produces a speckle-free image from a hologram recorded with lasers and then illuminated by a laser. Depending on the application, the object screen can be recorded as a reflection or transmission hologram.

Holographic display screen with integrated speckle suppression

An apparatus for recording the exterior retina reflex image of the human eye, has a scanning recorder. The beams of the exterior images pass through the spectacle glasses constructed on the inner side as vaulted, imaging, beam splitting mirrors. The scanning recorder for recording and detouring the parallel beam bundles exiting from the eye after backscattering by each spot on the retina, is a biaxial scanner. An opto-electronic detector receives the light bundles from the biaxial scanner for serial recording of the retina reflex image.

Apparatus for recording the retina reflex image and for superimposing of additional images in the eye

A method and apparatus for transmitting light, wherein a holographic video screen is used as part of an illuminating system. The tendency of such a video screen to backscatter light of certain wavelengths from a predefined direction into a certain solid angle area is utilized to generate holographic images at precisely defined angles. In ambient light, such a video screen need not appear black, or at least dark.

Illuminating system

Laser amplification system

Diode-pumped solid-state ring laser gyroscope

Solid-state laser system for color picture projection

Integrated microsystem comprising electrical and nonelectrical, particularly optical functions in a laser system, wherein a base comprising anisotropically etchable semiconducting material on which etching structures for receiving optical and/or electro-optical and electrical/electronic and/or fluidic and/or mechanical elements or their mountings are arranged in predetermined distances and/or levels, as well as integrated switching circuits, and that at least a part of the optical, electro-optical or mechanical elements or their mounting is controllable and movable electrically in such a way that its position relative to the base is actively changeable, and that at least one sensor is provided which determines the effect of the position change on the function of at least a part of a microsystem and supplies a signal for repeated readjustment (self-adjusting) of optical elements and their mounting.

Integrated microsystem

Growing community of inventors

Munich, Germany

Thorsteinn Halldorsson