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Ocular fundus camera system and methodology

  • US 9,936,869 B2
  • Filed: 01/18/2017
  • Issued: 04/10/2018
  • Est. Priority Date: 03/02/2011
  • Status: Active Grant
First Claim
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1. An ocular fundus camera system comprising:

  • light-source structure for illuminating the fundus in a subject'"'"'s eye,an optical path having upstream and downstream ends and an axis, extending downstream from the subject'"'"'s eye, and carrying, downstream along its length, both light that acts as if the pupil were its source, and light reflected from, and carrying an image of, the fundus,an image-detecting sensor located on the optical path proximate to the downstream end,an aperture operatively associated with, and stationary with respect to, said image-detecting sensor at a location which is upstream along the optical path from the image-detecting sensor,a discriminatory, light-content shifting structure disposed on said axis upstream therealong relative to said aperture, operable selectively for producing, within that portion of the optical path which is disposed intermediate the shifting structure and the aperture, relative trans-axial displacement-shifting solely of any non-collimated light carried in that portion of the optical path which is disposed immediately upstream from the shifting structure, anda structure selectively placeable across said illumination path for introducing, effectively, into light reflected from the fundus, edge-portion-containing optical contrast imagery having at least one contrast edge portion which lies at an angle relative to the direction of trans-axial shifting producible by said shifting structure, and whose spatial disposition in the fundus-reflection light is independent of eye movement.

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