1. A confocal microscope for imaging a sample comprising at least a light source arranged between at least one objective and an interference means, said microscope comprising a tube lens with an image focus, wherein said interference means is arranged between the at least one objective and the tube lens and is configured to generate interference figures from said light source, wherein said interference means comprise first image generation means constructed to generate a first image of said light source, second image generation means constructed to generate a second image of said light source symmetrical to the first image relative to the image focus, image interference means constructed to make said first image and said second image interfere.