Patent ID: 9661212
Date: 2017-05-23
CPC Classifications: G02B,H04N

Claim:
1. An apparatus for capturing an image, comprising: a stage configured to support a sample; a light source configured to emit light to the sample; an objective lens configured to face to the sample; a light splitting unit configured to split an optical image of the sample into a first optical path for obtaining a first optical image and a second optical path for obtaining a second optical image; a stage drive unit configured to move a field position of the objective lens with respect to the sample; a first imaging unit configured to capture the first optical image; a second imaging unit configured to capture the second optical image; a focus calculation unit configured to analyze the second optical image and calculate focus information of the sample according to a result of the analysis; an operation control unit configured to control operations of the stage drive unit and the second imaging unit; and an optical path difference generating member configured to generate an optical path difference in the second optical image; wherein the second imaging unit has a two-dimensional image pickup element, adapted to perform rolling readout, including a plurality of pixel columns; and wherein the operation control unit is configured to synchronize between movement of a predetermined part of the sample within a field of the objective lens caused by the field drive unit and readout of each pixel column of the two-dimensional image pickup element by rolling readout of the two-dimensional image pickup element.