The development and tests of a scanning system to be used to determine the corneal topography with the laser deflectometry method are presented. In this equipment, a He-Ne laser beam scans the cornea by describing a spiral trajectory generated by two components: radial and angular. The first component is produced by the displacement of a plane mirror moved by a linear pneumatic actuator. The second component is produced by passing the beam through a Dove prism which is rotating by means of a belt drive coupled to a high-speed electric motor. Tests were first performed by analyzing both components independently and then they were characterized by combining the two components. Results are discussed and compared to those of an earlier cited work.

Topics
DC motors, Data acquisition, Electric motors, Transducers, Fourier analysis, Geometrical optics, Optical devices, Optical reflectors, Visual system, Lasers
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© 2005 American Institute of Physics.
2005
American Institute of Physics
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