Carrier with at least one transilluminated optical position mark
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United States of America Patent
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Issued Date -
Dec 8, 2005
app pub date -
Jun 3, 2005
filing date -
Jun 3, 2004
priority date (Note) -
Abandoned
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Abstract
A carrier (2) with optically transilluminated position marks (3) can be positioned between a source of light (5) and an optical detector (4). The position mark (3) is built as an optical element that deflects the beam of light, which leads to significant variations in the intensity of light (8) at the central area of the image in the detector plane. With that, it is possible with less fabrication costs to furnish a measuring device that is robust against interfering influences.
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