Optics: measuring and testing – Shape or surface configuration
Reexamination Certificate
2006-04-07
2009-02-17
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
Shape or surface configuration
C356S603000, C356S612000, C356S625000, C433S029000, C433S215000
Reexamination Certificate
active
07492470
ABSTRACT:
The invention relates to a method for three-dimensional shape measurement of a body or of a part thereof, in particular of a dental object such as a model, by scanning non-contact distance measurement using an optical sensor device comprising a beam source, where the shape of the body subjects reproducing areas to a beam at various incidence angles (impinging beam), and the reflected beam (measuring beam) is measured, with the body being adjusted relative to the optical sensor device. To permit measurement with high precision of the body and undercuts thereof, without tilting being necessary, it is proposed that for shape measurement of the respectively measured area the beam (measuring beam) reflected therefrom, which describes an angle α to a surface normal corresponding to the respective area, is taken into account, said angle being equal to or smaller than a predefined critical angle αGRrelative to the surface normal.
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Brinkmann Hartmut
Büchler Erik
Garthaus Andre
Von Schroeter Philip
Degudent GmbH
Dennison, Schultz & MacDonald
Nguyen Sang
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