Sensor, lithographic apparatus, and device manufacturing method
The invention relates to a sensor comprising: a radiation source to emit radiation having a coherence length towards a sensor target; and a polarizing beam splitter to split radiation diffracted by the sensor target into radiation with a first polarization state and radiation with a second polarizat...
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| creator | Den Boef, Arie Jeffrey Kok, Haico Victor Tinnemans, Patricius Aloysius Jacobus Goorden, Sebastianus Adrianus Van Drent, William Peter |
| description | The invention relates to a sensor comprising: a radiation source to emit radiation having a coherence length towards a sensor target; and a polarizing beam splitter to split radiation diffracted by the sensor target into radiation with a first polarization state and radiation with a second polarization state, wherein the first polarization state is orthogonal to the second polarization state, and wherein the sensor is configured such that after passing the polarizing beam splitter radiation with the first polarization state has an optical path difference relative to radiation with the second polarization state that is larger than the coherence length. |
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Van Drent, William Peter</creatorcontrib><description>The invention relates to a sensor comprising: a radiation source to emit radiation having a coherence length towards a sensor target; and a polarizing beam splitter to split radiation diffracted by the sensor target into radiation with a first polarization state and radiation with a second polarization state, wherein the first polarization state is orthogonal to the second polarization state, and wherein the sensor is configured such that after passing the polarizing beam splitter radiation with the first polarization state has an optical path difference relative to radiation with the second polarization state that is larger than the coherence length.</description><language>eng</language><subject>ACCESSORIES THEREFOR ; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES ; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM ; APPARATUS SPECIALLY ADAPTED THEREFOR ; 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| subjects | ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS |
| title | Sensor, lithographic apparatus, and device manufacturing method |
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