Patent ID: 11460683

Abstract:
A detection optical unit (112) of an optical apparatus is configured to produce an imaged representation (151, 152) of a sample object (150) on a detector (114). An adjustable filter element (119) is arranged in a beam path of the detection optical unit (112) that defines the imaged representation (151, 152). A controller is configured to drive the adjustable filter element (119) to filter the spectrum of the beam path with a first filter pattern (301-308) and with a second filter pattern (301-308) and to drive the detector (114) to capture a first image, associated with the first filter pattern (301-308), and to capture a second image, which is associated with the second filter pattern (301-308). The controller is furthermore configured to determine a focus position (181) of the sample object (150) based on the first image and the second image. The first filter element (301-308) here defines a first line and the second filter element (301-308) defines a second line.