Patent ID: 8705000

Claim:
An illumination optics configured to illuminate an object field, the illumination optics comprising: a condenser group comprising optical components configured to guide a bundle of useful light along a path, the optical components comprising a first optical component having positive refractive power or negative refractive power; an objective group comprising bundle-guiding components arranged downstream of the condenser group in the path of useful light, the bundle-guiding components comprising a first bundle-guiding component; first and second displacement drives; and a control device, wherein: the first displacement drive is configured to displace the first optical component; the second displacement drive is configured to displace the first bundle-guiding component; the control device is configured so that, during use of the illumination optics: a) the control device sends a first signal to the first displacement drive so that the first displacement drive displaces the first optical component; and b) the control drive sends a second signal to the second displacement drive so that the second displacement drive displaces the first bundle-guiding component, thereby reducing an absolute value of a uniformity of an illumination state of the illumination optics; and the illumination optics is configured to be used in a projection exposure apparatus for microlithography.