Abstract: A device for reducing the brightness level of a portion of a display area of an imaging unit. The device comprises a gaze tracking unit adapted to assess eye gazing direction of an observer, a controllable transparency panel adapted to be mounted in front of a display area of an imaging unit and to display a changeable brightness reduction pattern having a original display brightness portion and a darkening portion therearound, and a controller which instructs the controllable transparency panel to change the brightness reduction pattern according to the eye gazing direction in real time so that the location of the original display brightness portion being correlated with the location of at least one fovea of the observer in real time.

Abstract: A directional filter device for controlling direction of maximal blocking of incident light, including: (a) a front polarizer; (b) a plurality of front electrodes; (c) a liquid crystal layer having a front surface for receiving light and a back surface for emitting light; (d) a plurality of back electrodes; (e) a back polarizer; and (f) circuitry for applying a voltage between said front electrodes and said back electrodes, wherein said circuitry is configured to apply voltage between front and back electrodes that do not face each other using voltage sequences that create electric fields at angles selected from a range of angles, which are not perpendicular to the front surface of the liquid crystal layer.

Abstract: The present invention provides a multi layer directional filter comprising (a) a front polarizer, (b) a front glass plate provided with a plurality of transparent, individually addressable upper electrodes and addressing lines, said front glass plate being disposed behind said front polarizer, (c) a front transparent insulating layer, said front transparent insulating layer being disposed behind said front glass plate, (d) a middle liquid crystal layer containing liquid crystal molecules, (e) a hind transparent insulating layer, said hind transparent insulating layer being disposed behind said middle liquid crystal layer, (f) a hind glass plate provided with a plurality of transparent, individually addressable lower electrodes and addressing lines, (g) a hind polarizer, said hind polarizer being disposed behind said hind glass plate, and, (h) control circuitry adapted to provide sequences of voltage patterns to said electrodes of said front glass plate and said hind glass plate.

Abstract: Permanent magnet assemblies are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient s body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized.

Abstract: Permanent magnet assemblies are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized.

Abstract: Permanent magnet assemblies are disclosed for use in medical applications, particularly permanent magnet assemblies for use in Magnetic Resonance Imaging (MRI) and/or Magnetic Resonance Therapy (MRT) to produce a volume of substantially uniform magnetic field in a restricted part of the patient's body in a region either adjacent to the surface of one permanent magnet assembly or between a set of a first and second permanent magnet assemblies, leaving open access to the patient's body. The assemblies consist of a plurality of annular concentric magnets spaced-apart along their axis of symmetry. A method for constructing such annular permanent magnetic assemblies is disclosed, using equi-angular segments permanently magnetized.