Device and method for optical 3D measurement and for color measurement
AssigneeSirona Dental Systems GmbH
InventorsFrank Thiel, Peter Fornoff
Life of this patent
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Abstract
The invention relates to a device and a method for optical 3D measurement, wherein said device can be switched between a first mode for optical 3D measurement using a chromatic confocal measurement method or the triangulation measurement method and a second mode for colorimetric measurement. In the first mode, a broad-band illuminating beam is focused onto a first plane and in the second mode the broad-band illuminating beam is focused onto a second plane other than the first plane at a distance d from the surface of the object to be measured.
Claims17
A device that operates in a first mode in which the device performs an optical 3D measurement and a second mode in which the device performs a colorimetric measurement, the device comprising:
- a base unit including a light source, a beam splitter, a diaphragm, and a color sensor;
- a first handpiece including a first objective that focuses a broad-band illuminating beam from the light source onto a first plane of a surface of an object to be measured when the device is operating in the first mode;
- a second handpiece including a second objective that focuses the broad-band illuminating beam from the light source onto a second plane other than the first plane at a distance from the surface of the object to be measured when the device is operating in the second mode, wherein,
- when the device is operating in said second mode, a plurality of points of focus for a plurality of wavelengths of said illuminating beam are at a distance from said first plane and the illuminating beam is reproduced out-of-focus as a measurement area on the surface of the object to be measured;
- and
- a light guide, wherein said light guide interconnects the base unit and the first handpiece when the device is operating in the first mode, and said light guide interconnects said base unit and the second handpiece when the device is operating in the second mode.
A device that operates in a first mode in which the device performs an optical 3D measurement and a second mode in which the device performs a colorimetric measurement, the device comprising:
- a base unit including a light source, a beam splitter, a diaphragm, and a color sensor;
- and
- a handpiece;
- and
- a light guide connecting the handpiece to the base unit,
- wherein the handpiece includes:
- a first objective that focuses a broad-band illuminating beam from the light source onto a first plane of a surface of an object to be measured when the device is operating in the first mode;
- a second objective that focuses the broad-band illuminating beam from the light source onto a second plane other than the first plane at a distance from the surface of the object to be measured when the device is operating in the second mode;
- and
- a revolving mechanism that revolves the first objective into the optical path of the illuminating beam when the device is operating in the first mode, and that revolves said second objective into the optical path of said illuminating beam when the device is operating in the second mode.
A method for optical 3D measurement and colorimetric measurement, the method comprising:
- selecting a device that operates in a first mode performing an optical 3D measurement and operates in a second mode performing a colorimetric measurement;
- and
- switching said device between said first and second modes, wherein
- when the device is operating in the first mode a broad-band illuminating beam is focused onto a first plane of a surface of an object to be measured, and
- when the device is operating in the second mode, said broad-band illuminating beam is focused onto a second plane other than said first plane at a distance from the surface of the object to be measured, such that a plurality of focal points for a plurality of wavelengths of said illuminating beam are at a distance from said first plane and said illuminating beam is reproduced out-of-focus and forms a circular feature as a measurement area on the surface of the object to be measured.
A device that operates in a first mode in which the device performs an optical 3D measurement and a second mode in which the device performs a colorimetric measurement, the device comprising:
- a base unit including a light source, a beam splitter, a diaphragm, and a color sensor;
- and
- a handpiece, wherein the handpiece includes:
- a first objective that focuses a broad-band illuminating beam from the light source onto a first plane of a surface of an object to be measured when the device is operating in the first mode;
- a second objective that focuses the broad-band illuminating beam from the light source onto a second plane other than the first plane at a distance from the surface of the object to be measured when the device is operating in the second mode, and
- wherein, the first objective is inserted into the optical path of the illuminating beam when the device is operating in the first mode, and the second objective is inserted into the optical path of the illuminating beam when the device is operating in the second mode.
Dependencies are inferred from the claim text.