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Wavefront coding interference contrast imaging systems

  • US 7,732,750 B2
  • Filed: 09/01/2006
  • Issued: 06/08/2010
  • Est. Priority Date: 02/03/1995
  • Status: Expired due to Term
First Claim
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1. In a method for imaging a phase object utilizing an interference contrast imaging system, the system having an illumination source, an optical element for dividing light polarizations, illumination optics, an optical element for recombining the light polarizations, and objective optics to form an image at a detector, the system characterized by an unaltered optical transfer function, the improvement comprising:

  • configuring at least one of the optical elements and the optics of the interference contrast imaging system for encoding a wavefront transmitted therethrough to produce an altered optical transfer function of the interference contrast imaging system that is substantially insensitive to an object distance between the phase object and the objective optics over a greater range of object distances as compared to the unaltered optical transfer function.

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