The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2018
Filed:
Apr. 24, 2015
Alicona Imaging Gmbh, Raaba bei Graz, AT;
Manfred Prantl, Graz, AT;
Stefan Scherer, Graz, AT;
Franz Helmli, St. Nikolai/Sausal, AT;
Attila Saghy, Mosonmagyrovar, HU;
ALICONA IMAGING GMBH, Raaba Bei Graz, AT;
Abstract
An illumination device for a microscope or an optical 3D surface measuring apparatus, more particularly according to the principle of focus variation. The illumination device includes LEDs arranged in a planar fashion, and an illumination optical unit for imaging the illumination spectrum onto an object to be examined. The illumination optical unit includes an arrangement of converging lenses and one Fresnel lens, and the light beams emitted by the LEDs firstly impinge on the converging lenses and then impinge in a parallel-directed manner on the Fresnel lens. The Fresnel lens is oriented in reflective arrangement such that lens vertices of a prism structure are arranged at a light exit side of the Fresnel lens, facing away from the converging lenses. The converging lenses are formed by annular segments, and adjacent annular segments adjoin one another in a planar fashion at a segment side surface.