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Apparatus and method for imaging

  • US 6,833,920 B2
  • Filed: 01/12/2002
  • Issued: 12/21/2004
  • Est. Priority Date: 07/11/2000
  • Status: Expired due to Term
First Claim
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1. An apparatus for imaging, comprising:

  • a light source emitting a polarized light beam;

    an optical assembly including a top surface and a bottom surface, wherein (a) the bottom surface includes first and second grating portions positioned such that the light beam passes through the first grating portion, reflects at the top surface to provide an evanescent field adjacent the top surface, and exits the optical assembly through the second grating portion, and (b) the optical assembly accommodates positioning a specimen array within the evanescent field, such that the specimen array causes spatially distributed polarization changes in the cross-section of the light beam; and

    a two-dimensional array detector positioned to detect the spatially distributed polarization changes in the light beam to provide an image of the specimen array.

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