IMAGING DEVICE AND METHOD FOR IMAGING AN OBJECT USING A MICROSCOPE

An imaging device for a microscope comprises an optical imaging system configured to form at least two optical images of an object in at least two different focusing states, and a processor configured to process image information from the at least two optical images in order to obtain phase information, said phase information being characteristic of said object being imaged. The optical imaging system comprises an image sensor module having at least two image sensors associated with the at least two different focusing states, respectively, said at least two image sensors being configured to simultaneously detect the at least two optical images for generating the image information. The image sensor module comprises an adjustable aperture element which is controllable by the processor.