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Vorrichtung und Verfahren zur Erzeugung eines optischen Musters aus Bildpunkten in einer Bildebene

Device and method for producing an optical pattern form pixels in an image plane
 
: Dürr, Peter; Mai, Alexander

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Frontpage ()

DE 102016204703 A1: 20160322
German
Patent, Electronic Publication
Fraunhofer IPMS ()

Abstract
The invention relate to a device for producing an optical pattern from pixels in an image plane, comprising: a control apparatus for controlling the production of the optical pattern; a micromirror array for reflecting light beams, which hit the micromirror array over an area, wherein the micromirror array has a plurality of micromirrors, each of which can be tilted by the control apparatus at least about a first axis such that a direction of a center-of-gravity beam of the light beams reflected at the particular micromirror can be set; a lighting apparatus controllable by the control apparatus for producing the light beams, which is designed in such a way that the light beams are at least partially planarly coherent; a focusing apparatus for focusing the light beams reflected at the plurality of micromirrors of the micromirror array onto the image plane; wherein the control apparatus is designed to control one or more micromirror groups formed by several micromirrors of the plurality of micromirrors in such a way that the center-of-gravity beams reflected at the micromirrors of one of the micromirror groups meet in the image plane and that optical path lengths of the center-of-gravity beams reflected at the micromirrors of the particular micromirror group from the lighting apparatus to the image plane are equal or differ by an integer multiple of a wavelength of the light beams in order to thus produce one of the pixels.

: http://publica.fraunhofer.de/documents/N-487431.html