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1. CA2763426 - PROCEDE ET DISPOSITIF DE MESURE TRIDIMENSIONNELLE D'UN OBJET

Office
Canada
Numéro de la demande 2763426
Date de la demande 17.05.2010
Numéro de publication 2763426
Date de publication 18.11.2010
Numéro de délivrance
Date de délivrance 22.08.2017
Type de publication C
CIB
G01B 11/24
GPHYSIQUE
01MÉTROLOGIE; TESTS
BMESURE DE LA LONGUEUR, DE L'ÉPAISSEUR OU DE DIMENSIONS LINÉAIRES ANALOGUES; MESURE DES ANGLES; MESURE DES SUPERFICIES; MESURE DES IRRÉGULARITÉS DES SURFACES OU CONTOURS
11Dispositions pour la mesure caractérisées par l'utilisation de moyens optiques
24pour mesurer des contours ou des courbes
A61B 5/00
ANÉCESSITÉS COURANTES DE LA VIE
61SCIENCES MÉDICALE OU VÉTÉRINAIRE; HYGIÈNE
BDIAGNOSTIC; CHIRURGIE; IDENTIFICATION
5Mesure servant à établir un diagnostic; Identification des individus
G02B 21/00
GPHYSIQUE
02OPTIQUE
BÉLÉMENTS, SYSTÈMES OU APPAREILS OPTIQUES
21Microscopes
CPC
G01B 11/24
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
24for measuring contours or curvatures
A61B 5/0068
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
0059using light, e.g. diagnosis by transillumination, diascopy, fluorescence
0062Arrangements for scanning
0068Confocal scanning
A61B 5/0088
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
0059using light, e.g. diagnosis by transillumination, diascopy, fluorescence
0082adapted for particular medical purposes
0088for oral or dental tissue
A61B 5/1075
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
103Detecting, measuring or recording devices for testing the shape, pattern, ; colour,; size or movement of the body or parts thereof, for diagnostic purposes
107Measuring physical dimensions, e.g. size of the entire body or parts thereof
1075for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer
A61B 2562/0233
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2562Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
02Details of sensors specially adapted for in-vivo measurements
0233Special features of optical sensors or probes classified in A61B5/00
A61C 9/006
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
9Impression cups, ; i.e. impression trays; Impression methods
004Means or methods for taking digitized impressions
0046Data acquisition means or methods
0053Optical means or methods, e.g. scanning the teeth by a laser or light beam
006projecting one or more stripes or patterns on the teeth
Déposants DEGUDENT GMBH
Données relatives à la priorité 102009025815 15.05.2009 DE
Titre
(EN) METHOD AS WELL AS MEASURING SYSTEM FOR THREE-DIMENSIONAL MEASURING OF AN OBJECT
(FR) PROCEDE ET DISPOSITIF DE MESURE TRIDIMENSIONNELLE D'UN OBJET
Abrégé
(EN)



Method for measuring the shape of at least one section of an object (8), in
particular a semi-transparent object such
as at least one section of a tooth, using a light source (1) for generating
light with preferably a broadband spectrum in a device (3)
for generating a multifocal illumination pattern, a lens (6) with a large
chromatic aberration for imaging foci of the illumination
pattern onto the object, and a detection device (12) for determining the
wavelength spectra of the foci confocally imaged onto the
object via the lens, wherein a spectral peak position of each focus is
determined from the respective wavelength spectrum, from
which position the extent of the object in the direction of the imaging beam
(Z coordinate) is calculated, wherein the multifocal
illumination pattern is formed via optical waveguides (5) arranged between the
light source (1) and the lens (6) with a large
chromatic aberration, wherein the lens (6) images object-side ends of the
optical waveguides onto the object and images light remitted
by the object onto the object-side ends of the optical waveguides, and wherein
light guided and remitted by the optical waveguides
is guided to the detection device (12). In order to make it possible to carry
out highly accurate measurements with structurally
simple measures, wherein the intention is to



enable both the best possible distribution of measuring points on the sample
and optimum spectrum distribution in the detection
device, provision is made for the object-side illumination pattern to be
formed via the optical waveguides (5) in such a manner
that an object-side distribution of measuring points is independent of an
illumination-side and detection-side microlens or pinhole
distribution.