Patent ID: 7154092
Filing Date: 2006-12-26
Classification: H01J

Abstract:
1. A method of three-dimensional image reconstruction for reconstructing a three-dimensional image of a specimen based on TEM (transmission electron microscope) images by tilting the specimen at plural tilt angles and obtaining the TEM images at these tilt angles, wherein (a) a positive focal point position of an objective lens incorporated in a transmission electron microscope is detected at each of the tilt angles of the specimen, (b) a focal point position of the objective lens is set to plural positions which are shifted from said positive focal point position by amounts of defocus Δf (c) a single optimum TEM image is selected at each of the tilt angles of the specimen from the TEM images obtained by the steps (a) and (b) above, and (d) a three-dimensional image of the specimen is reconstructed based on the selected TEM images.