Filter array with reduced stray focused light
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United States of America Patent
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Jun 25, 2019
Grant Date -
May 4, 2017
app pub date -
Oct 28, 2016
filing date -
Nov 3, 2015
priority date (Note) -
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Abstract
An apparatus is disclosed comprising an optical filter array including an array of optical filter elements; wherein each optical filter element has opposing mutually parallel principal faces connected by sidewalls including at least one pair of opposing trapezoidal sidewalls and at least one pair of opposing sidewalls that are not mutually parallel; and wherein the opposing mutually parallel principal faces of the filter elements collectively define optical entrance and exit apertures of the optical filter array and include interference filters. Further disclosed is a method of illuminating such a filter array.
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