VECTOR LIGHT SENSOR AND ARRAY THEREOF
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United States of America Patent
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Issued Date -
May 5, 2016
app pub date -
Oct 28, 2015
filing date -
Oct 31, 2014
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Abstract
A vector light sensor (VLS) includes a substrate and a sensor structure. The substrate includes a major surface. The sensor structure includes a pyramid structure, light-sensitive areas, and electrical contacts. The pyramid structure forms at least a portion of a body of the sensor structure and has predefined angles between the major surface of the substrate and a plurality of sidewalls of the pyramid. The light-sensitive areas are formed on two or more of the plurality of sidewalls of the pyramid structure. The electrical contacts are electrically coupled to the light-sensitive areas. Information about the intensity and direction of an incident light beam can be extracted by comparing signals from two or more of the light-sensitive areas. One or two dimensional arrays of VLS may be fabricated and used, for example, as an image sensor.
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