Patent ID: 7907348
Filing Date: 2011-03-15
Classification: G02B

Abstract:
1. A microscope optical system comprising: a microscope objective including anti-symmetric lenses or lens groups; wherein image defects of the microscope objective, selected from a group consisting of spherical aberration, coma, astigmatism, distortion and a combination of the forgoing, are largely corrected; primary longitudinal chromatic aberration of the microscope objective is corrected; nominal optical magnification of the microscope objective is −100 for a numerical aperture, using oil immersion, of 1.25; and longitudinal chromatic aberrations of the microscope objective for a secondary spectrum are within the range of a triple depth of focus, and image field flattening of the microscope objective is reduced such that a best focus position on an edge of the field differs by less than two depths of focus from an axial focus position.