Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Ralf Gottfried-Gottfried

Heinz Kueck

Heinrich Grueger

Detlef Kunze

Heinz K&uuml;ck

Michael Mueller

An apparatus for detecting a rotation angle of a rotation around an axis of rotation includes a transducer magnet for generating a magnetic field as well as a plurality of magnetic-field-sensitive sensor elements for detecting the magnetic field. The magnet and the plurality of magnetic-field-sensitive sensor elements are arranged such that, during a rotation around the axis of rotation, the plurality of magnetic-field-sensitive sensor elements circles relative to the transducer magnet around the same. By the plurality of magnetic-field-sensitive sensor elements, a scale is defined, with the transducer magnet being arranged such that the generated magnetic-field comprises a characteristic on a locus on the scale, and the locus on the scale being dependent on a partial area of a full rotation in an unique manner from the rotation angle. The transducer magnet is magnetized inclined to the axis of rotation. The apparatus enables on the one hand a simple transducer magnet structure and on the other hand an accurate and easy measuring processing process.

Rotation angle sensor

A structure for the phase modulation of light (,) incident upon said structure comprises a mirror (,), a deformable and transparent dielectric (,) disposed on the mirror (,), at least two electrodes (,) having one or several fixed potentials and being adapted to have one or more control voltages applied thereto for generating an electric field (,) in at least a partial region of said dielectric (,), thereby changing the optical path length of the light passing through said dielectric (,) with respect to a state of the dielectric (,) in which the electric field is not applied thereto. An arrangement of a plurality of such phase-modulating structures applied on a CMOS active matrix constitutes a very large scale integrated spatial light modulator.

Phase-modulating microstructures for highly integrated surface light modulators

Miniaturized coil arrangement made by planar technology, for the

Infrared radiation absorption device

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Dresden, Germany

Ralf Gottfried-Gottfried