Carl-zeiss-smt Ag

Manfred Dahl

Michael Totzeck

Ulrich Wegmann

Michael Hartl

Martin Schriever

Wolfgang Emer

Helmut Haidner

Markus Mengel

Uwe Schellhorn

Rainer Hoch

A method for determining at least one of distortion and de-focus for an optical imaging system. The method includes determining wavefront aberrations in a pupil plane of the optical imaging system by a wavefront measurement method, determining focus offset measured values in an xy-direction and/or z-direction for one or more different illumination settings by a test pattern measurement method with imaging and comparative evaluation of test patterns for the optical imaging system, and determining values for one or more aberration parameters that relate to the distortion and/or image surface from a prescribed relationship between the determined wavefront aberrations and the determined focus offset measured values. By prescribing a relationship between the wave aberrations and the focus offset measured values, it is possible for the results of the wavefront measurement method and of the test pattern measurement method to be linked to one another so as to enable an improved precision in the determination of distortion and/or image surface.

Method for determining distortion and/or image surface

A method and an apparatus for determining the influencing of the state of polarization of optical radiation by an optical system under test, wherein radiation with a defined entrance state of polarization is directed onto the optical system, the exit-side state of polarization is measured, and the influencing of the state of polarization is determined by the optical system with the aid of evaluation of the exit state of polarization with reference to the entrance state of polarization. An analyser arrangement which can be used for this purpose is also disclosed. The method and the apparatus are used, e.g., to determine the influencing of the state of polarization of optical radiation by an optical imaging system of prescribable aperture, the determination being performed in a pupil-resolved fashion.

Method and apparatus for determining the influencing of the state of polarization by an optical system; and an analyser

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Lauchheim, Germany

Manfred Dahl