Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1987-11-25
1990-02-20
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351247, A61B 310
Patent
active
049021230
ABSTRACT:
A contour measuring apparatus and method of using the apparatus is disclosed to measure the three-dimensional contour of a surface. A multi-point light source directs a plurality of light beams onto the surface to be measured. The light beams are reflected through a lens onto a photodetector to produce electro-optically measurable optical images. A structure is provided to determine the local radius of curvature of the surface at each desired point of incidence of individual light beams and the three-dimensional surface contour of the surface being measured. A calibration device is provided to reduce instrument errors of the apparatus. The calibration device includes a calibration surface with a known contour to be positioned in substitution of the surface being measured. The apparatus includes a structure to sequentially determine and store a memory of the location of the calibration surface and to compare the reflection of the light from the calibration surface as well as the surface being measured to determine the contour of the surface being measured.
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Bovernick Rodney B.
Taunton Technologies, Inc.
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