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Focusing mechanisms for compressive imaging device

  • US 8,717,492 B2
  • Filed: 08/11/2011
  • Issued: 05/06/2014
  • Est. Priority Date: 08/11/2010
  • Status: Expired due to Fees
First Claim
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1. A method for focusing a compressive imaging (CI) device, the method comprising:

  • (a) supplying a sequence of spatial patterns to a light modulation unit of the CI device, wherein the light modulation unit includes an array of light modulating elements;

    (b) the light modulation unit modulating an incident light stream with the sequence of spatial patterns to produce a modulated light stream, wherein each of the spatial patterns is restricted to a subset of the array of light modulating elements;

    (c) a light sensing device of the CI device receiving the modulated light stream and acquiring a sequence of samples representing an intensity of the modulated light stream as a function of time, wherein the sequence of samples includes at least one sample for each of the spatial patterns;

    (d) constructing an image using the sequence of spatial patterns and the acquired samples;

    (e) computing a focus indicator value based on the image, wherein the focus indicator value indicates an extent to which the incident light stream is in focus at the light modulation unit.

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