Photocopying – Projection printing and copying cameras – Illumination systems or details
Reexamination Certificate
2006-01-24
2008-08-12
Kim, Peter B (Department: 2851)
Photocopying
Projection printing and copying cameras
Illumination systems or details
C359S490020, C359S506000, C355S053000, C355S067000
Reexamination Certificate
active
07411656
ABSTRACT:
A retardation arrangement for converting an input radiation beam, incident from an input side of the retardation arrangement, into an output radiation beam which has over its cross section a spatial distribution of polarization states which can be influenced by the retardation arrangement and differs from the spatial distribution of polarization states of the input radiation, is designed as a reflective retardation arrangement. A useful cross section of the retardation arrangement has a multiplicity of retardation zones of different retardation effect. Such a mirror arrangement having a retardation effect varying as a function of location can be used to compensate undesired fluctuations in the polarization state over the cross section of an input radiation beam and/or to set specific output polarization states, for example in order to set radial or tangential polarization.
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Enkisch Birgit
Schuster Karl-Heinz
Totzeck Michael
Carl Zeiss SMT AG
Kim Peter B
Sughrue & Mion, PLLC
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