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System, apparatus and method for extracting three-dimensional information of an object from received electromagnetic radiation

  • US 9,804,563 B2
  • Filed: 02/03/2016
  • Issued: 10/31/2017
  • Est. Priority Date: 11/17/2006
  • Status: Active Grant
First Claim
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1. An apparatus configured to produce a hologram of an object, said apparatus comprising:

  • an electromagnetic radiation source configured to provide incoherent electromagnetic radiation on the object;

    a correlator comprising a first optical assembly configured to receive incoherent electromagnetic radiation reflected by or scattered from the object and transmit transformed electromagnetic radiation, a mask assembly configured to receive the transformed electromagnetic radiation and transmit amplitude and/or phase modified electromagnetic radiation, and a second optical assembly configured to receive the amplitude and/or phase modified electromagnetic radiation and transmit further transformed electromagnetic radiation; and

    an image capture assembly configured to capture an image of the transmitted further transformed electromagnetic radiation, and produce the hologram of the object based on the captured image,wherein the mask assembly includes one or more diffractive optical elements, each of the one or more diffractive optical elements including an array of plural transform regions, each of which is configured to transform amplitude and/or phase of the received transformed electromagnetic radiation, and at least one of the diffractive optical elements includes a plurality of volume-modulated diffractive optical elements, each of the volume-modulated diffractive optical elements corresponding to a different transform region, each of the volume-modulated diffractive optical elements having a volume that is different from a volume of at least one other volume-modulated diffractive optical element and is configured to transform the amplitude and/or phase of the received transformed electromagnetic radiation to produce the amplitude and/or phase modified electromagnetic radiation.

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