Patent ID: 7648241
Filing Date: 2010-01-19
Classification: A61B

Abstract:
1. An apparatus for measuring a subject's cornea, comprising: (A.) a slit beam projection subsystem comprising a light source; (B.) a mask subsystem disposed in a path of light from the light source, comprising a first slit mask defining a plurality of apertures; (C.) a movement apparatus adapted to move at least a portion of the slit projection subsystem to transmit light through each of the plurality of apertures while maintaining the plurality of apertures in a fixed location, the movement apparatus configured and arranged such that, by moving the portion of the slit beam projection subsystem, portions of the light can be selectively transmitted through only one aperture of the plurality of apertures at a time toward the cornea; (D.) an imaging element configured and arranged to image at least one of the plurality of apertures onto the cornea; and (E.) an image capture subsystem arranged to capture images of the portions of light after the light impinges on the cornea.