Patent ID: 8177364

Claim:
An illumination device for an observation device having one, two or more observation beam paths, having an observation light bundle for each path, having at least one light source for producing at least one illumination light bundle for illuminating an object to be observed, in particular, an eye to be observed, wherein at least two partial illumination light bundles are provided and wherein each partial illumination light bundles runs coaxially to a corresponding observation light bundle, hereby characterized in that at least one device for changing the cross section of the bundle of the at least one illumination light bundle and/or at least one partial illumination light bundle is provided, in that the partial illumination light bundle are/will be structured in such a way that they form two or more lighting spots that are variable in size on the fundus of an object to be observed, and in that the diameter of the lighting spots on the fundus of the object to be observed can be varied in a range between 0.5 and 1.5 mm, and in that the device is constructed as a diaphragm, in particular an iris diaphragm, or a discrete diaphragm, as an LCD display, as a DMD, as an LCOS or as an FLCOS.