System and method for measuring corneal topography

A - Human Necessities – 61 – B

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A61B 3/107 (2006.01) G01B 11/24 (2006.01)

Patent

CA 2691658

A system measures a corneal topography of an eye. The system includes a group of first light sources arranged around a central axis, the group being separated from the axis by a radial distance defining an aperture in the group; a plurality of second light sources; a detector array; and an optical system adapted to provide light from the second light sources through the aperture to a cornea of an eye, and to provide images of the first light sources and images of the second light sources from the cornea, through the aperture, to the detector array. The optical system includes an optical element having a focal length,/ The second light sources are disposed to be in an optical path approximately one focal length,/ away from the optical element.

L'invention concerne un système servant à mesurer la topographie cornéenne d'un oeil. Le système comprend un groupe de premières sources lumineuses placées autour d'un axe central, ledit groupe étant séparé de l'axe par une distance radiale définissant une ouverture dans le groupe; une pluralité de deuxièmes sources lumineuses; un réseau de détecteurs; et un système optique conçu pour transmettre la lumière provenant des deuxièmes sources lumineuses, par l'ouverture, sur la cornée d'un oeil, et pour transmettre au réseau de détecteurs, par l'ouverture, des images des premières sources lumineuses et des images des deuxièmes sources lumineuses provenant de la cornée. Ce système optique comprend un élément optique comportant une longueur focale. Les deuxièmes sources lumineuses sont placées dans un chemin optique, à une distance approximative d'une longueur focale de l'élément optique.

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