| 摘要 |
A corneal topographer is described, the topographer comprising: - a multicolored stimulator comprising a plurality of light sources arranged to form a multicolored pattern of source points for projecting a plurality of light rays onto a surface of an object of interest, such as a cornea; - a lens-camera system arranged to receiving a respective plurality of reflected light rays reflected of the surface of the object of interest, thereby forming a pattern of image points; - a computational unit for determining a mathematical model of the surface; the computation unit comprising a memory unit provided with color pattern information based on the multicolored pattern of source points of the stimulator; the computational unit being arranged to, for each of the plurality of reflected light rays, establishing a one-to-one correspondence between a source point and an image point based on the color pattern information; the computational unit further being arranged to construct, based on positions of the image points and positions of the corresponding source points, the mathematical model of the surface. |
