Patent ID: 6875972
Filing Date: 2005-04-05
Classification: G02B

Abstract:
1. An autofocus module for a microscope-based system, comprising: an objective that defines an image beam path which is perpendicular to a surface of a specimen an illumination beam path that encompasses a light source for illumination of the specimen, a light source for generating a measurement light bundle for determining a focus position; an optical means for splitting the measurement light bundle in such a way that an eccentrically extending measurement light beam bundle is created; a first dichroic beam splitter is provided in the image beam path of the microscope-based system, which couples the measurement light beam bundle eccentrically into the microscope-based system and directs it onto the surface of the specimen; the optical means directs onto a detector element a measurement light beam bundle remitted from the microscope-based system; and a cylindrical lens between the detector element and the optical means.