Measuring device with a reduced share of stray light
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United States of America Patent
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Aug 23, 2016
Grant Date -
Nov 12, 2015
app pub date -
Jul 1, 2015
filing date -
Aug 25, 2009
priority date (Note) -
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Abstract
A device for measurement by means of a light ray is equipped with a covering device for reducing stray light. The device comprises an array of lenses along an optical axis; a prism attached to one of the lenses with a slanted surface for coupling of the light ray incident from a light source placed lateral to the optical axis, onto the optical axis, so that the light ray can pass through the array of lenses along the optical axis; a receiver for receipt of a share of the light ray reflected by an object; and a covering device for at least one area of the prism that scatters a share of the light ray as stray light to the receiver.
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