Patent ID: 9091845
Filing Date: 2015-07-28
Classification: G02B

Abstract:
1. A confocal scanning microscope comprising: an apochromat objective optical system that converges illumination light on a sample, forms a first image plane locating at a conjugate position with the sample, and corrects lateral chromatic aberration over an entire visible wavelength range; a scanning mechanism that scans the illumination light on a surface of the sample; and a scanning optical system that is provided between the scanning mechanism and the first image plane formed by the apochromat objective optical system; the scanning optical system being composed of, in order from the scanning mechanism side, a first lens group, a second lens group, and a third lens group, wherein the first lens group has positive refractive power, the second lens group has negative refractive power, and the third lens group has positive refractive power, the third lens group has first and second chromatic aberration correction portions, each formed by a positive lens and a negative lens adjoining each other or by a negative lens and a positive lens adjoining each other, the first chromatic aberration correction portion being configured to carry out chromatization, and the second chromatic aberration correction portion being configured to carry out achromatization, and the first and second chromatic aberration correction portions correct lateral chromatic aberration generated in an ultraviolet wavelength region by the apochromat objective optical system.