Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Sascha Mühlmann

Ulrich Hofmann

Thomas Lisec

Joachim Janes

Manfred Weiss

Lars Ratzmann

Sven Grünzig

The invention relates to a deflection device for a projection apparatus for projecting Lissajous figures onto an observation field which is made to deflect a light beam about at least one first and one second deflection axis for generating Lissajous figures having a deflection unit for producing oscillations about the deflection axes and having a control apparatus for producing control signals for the deflection unit having a first and second control frequency which substantially corresponds to the resonant frequencies of the deflection unit, wherein the deflection unit has a quality factor of &#x3e;3,000 and the control apparatus includes a feedback loop which is configured to regulate the first and/or second control frequencies in dependence on a measured phasing of the oscillations of the deflection unit so that the maximum amplitude of the oscillations remains in the resonant range of the deflection unit. The invention further relates to a projection apparatus having such a deflection device as well as to a method for controlling a corresponding deflection device.

Deflection device for a projection apparatus, projection apparatus for projecting an image and method for controlling a deflection apparatus for a projection apparatus

A pipette system including a pipette capillary tube and an actuator, with the actuator serving to set the position of a phase boundary between a system medium and a second medium in the pipette capillary is described. A sensor element is also provided for measuring the position of the phase boundary, in such a way that the actuator is controlled by a regulating element in response to an output signal from the sensor element.

Pipette system and pipette array

Growing community of inventors

Itzehoe, Germany

Sascha Mühlmann