CONOSCOPIC ILLUMINATION OPTICAL DEVICE WITH A HOLLOW CONE FOR AN OPTICAL MICROSCOPE AND METHOD OF OPTICAL MICROSCOPY IN CONOSCOPY

摘要

The present invention concerns a method of microscopy and an illumination optical device with a hollow cone for a microscope. According to the invention, the illumination device comprises a first conical lens (1) able to receive a collimated incident light beam (10) and form a conical light beam (20), a second conical lens (5) arranged in such a way as to receive said conical light beam (20, 40) and to form a cylindrical light beam with a black background (50) and an optical lens (6) having an image focal plane (12) arranged in such a way as to receive said cylindrical light beam with a black background (50), to form a hollow cone light beam (60) and to focus said hollow cone light beam (60) into a point (18) in the image focal plane (12).