Three-dimensional scanner and control method
AssigneeJ. Morita Mfg. Corp.
InventorTsuyoshi Tanaka
Life of this patent
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Abstract
A three-dimensional scanner includes a lens, imaging circuitry that obtains an image of an object located at a focal position of the lens, a lens driver that drives the lens to make reciprocating motion in a linear direction, obtaining circuitry that obtains geometrical data representing a surface geometry based on an image taken by the imaging circuitry, and lens controller circuitry that controls the lens driver to change an amplitude of reciprocating motion of the lens based on the geometrical data obtained by the obtaining circuitry.
Claims18
A three-dimensional scanner configured to obtain three-dimensional data of a surface geometry of an object with a focus method, the three-dimensional scanner comprising:
- a lens;
- imaging circuitry configured to obtain an image of the object located at a focal position of the lens;
- a lens driver configured to drive the lens to make reciprocating motion in a linear direction;
- obtaining circuitry configured to obtain geometrical data representing the surface geometry based on the image taken by the imaging circuitry;
- an estimator circuitry configured to estimate a ratio, in a depth of field, of a tooth included in the object based on the geometrical data obtained by the obtaining circuitry;
- and
- lens controller circuitry configured to control the lens driver to change an amplitude of reciprocating motion of the lens based on the ratio.
A control method of controlling a three-dimensional scanner configured to obtain three-dimensional data of a surface geometry of an object, the control method comprising, using processing circuitry of a computer:
- obtaining an image of the object located at a focal position of a lens provided in the three-dimensional scanner;
- driving the lens to make reciprocating motion in a linear direction;
- obtaining geometrical data representing the surface geometry based on an image taken in the obtaining of the image;
- estimating a ratio, in a depth of field, of a tooth included in the object based on the geometrical data;
- and
- changing an amplitude of reciprocating motion of the lens based on the ratio.
Dependencies are inferred from the claim text.