Patent ID: 8456616

Claim:
An optical system having an optical axis, the optical system comprising: an optical correction arrangement, comprising: a first optical correction element having a first aspherical surface contour; a second optical correction element having a second aspherical surface contour and a third aspherical surface contour; a third optical correction element having a fourth aspherical contour; and a rotary drive configured to rotate at least one element about a rotation axis which is at least approximately parallel to the optical axis of the optical system, the at least one element being selected from the group consisting of the first optical correction element, the second optical correction element and the third optical correction element, wherein: the second optical correction element is between the first and third optical correction elements; the first and second surface contours are complementary; the third and fourth surface contours are complementary; the first and second optical correction elements form a first correction element pair; the second and third optical correction elements form a second correction element pair; the aspherical surface contours of the first correction element pair differ from the aspherical surface contours of the second correction element pair; the aspherical surface contours of the first correction element pair are matched to an order of aberration; the aspherical surface contours of the second correction element pair are matched to a higher order of the same aberration; and the optical system is a microlithography projection objective.