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Lens-less optical position measuring sensor

  • US 9,702,690 B2
  • Filed: 12/19/2011
  • Issued: 07/11/2017
  • Est. Priority Date: 12/19/2011
  • Status: Active Grant
First Claim
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1. An integrated circuit for detecting an angle of incident light, comprising:

  • a surface having apertures;

    a plurality of photodetectors arranged in at least three pairs of photodetectors and separated from each other by trenches, each of the pairs of the photodetectors is aligned underneath a respective one of the apertures; and

    an optically transparent solid medium disposed between the surface and the plurality of photodetectors,wherein at least two pairs of the pairs of photodetectors are aligned in a first direction and wherein outputs of corresponding photodetectors of each of the at least two pairs of photodetectors are electrically coupled together in parallel so as to generate aggregated photocurrents that depend on the angle of the incident light in relation to the first direction, with the angle of incident light in relation to the first direction being detectable based on a ratio of the aggregated photocurrents generated by the corresponding photodetectors of the at least two pairs of photodetectors; and

    a plurality of opaque barriers disposed in the optically transparent solid medium, wherein each of the at least three pairs of photodetectors is separated from each adjacent pair of photodetectors by one of the plurality of opaque barriers and the pairs of photodetectors that are adjacent to each another are collinear.

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