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1. US20090021750 - Method and arrangement for a rapid and robust chromatic confocal 3D measurement technique

Amt Vereinigte Staaten von Amerika
Aktenzeichen/Anmeldenummer 12223079
Anmeldedatum 02.08.2007
Veröffentlichungsnummer 20090021750
Veröffentlichungsdatum 22.01.2009
Erteilungsnummer 7787132
Erteilungsdatum 31.08.2010
Veröffentlichungsart B2
IPC
G01B 11/24
GPhysik
01Messen; Prüfen
BMessen der Länge, der Dicke oder ähnlicher linearer Abmessungen; Messen von Winkeln; Messen von Flächen; Messen von Unregelmäßigkeiten an Oberflächen oder Umrissen
11Messanordnungen gekennzeichnet durch die Verwendung optischer Messmittel
24zum Messen von Umrisslinien oder Krümmungen
CPC
G01B 11/25
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
25by projecting a pattern, e.g. ; one or more lines,; moiré fringes on the object
G01B 2210/50
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
2210Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
50Using chromatic effects to achieve wavelength-dependent depth resolution
G06T 7/521
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
50Depth or shape recovery
521from laser ranging, e.g. using interferometry; from the projection of structured light
Anmelder Sirona Dental Systems GmbH
Erfinder Körner Klaus
Kohler Christian
Papastathopoulus Evangelos
Osten Wolfgang
Vertreter Dykema Gossett pLLC
Prioritätsdaten 102006007170 08.02.2006 DE
Titel
(EN) Method and arrangement for a rapid and robust chromatic confocal 3D measurement technique
Zusammenfassung
(EN)

A chromatic confocal technique and apparatus for the rapid three-dimensional measurement of an object shape, particularly of a tooth in a patient's jaw, using an array of polychromatic point light sources, a planar detector matrix, a beam splitter for lateral spectral separation, and an objective for illuminating and recording the object. Spectral defined reference light bundles are generated, injected into the detection beam path via a reference beam path and, following spectral splitting, are focused on the detector matrix as reference image points, wherein laterally shifted sub-matrices are numerically defined on the detector matrix for spectral analysis of the object light, which sub-matrices are implemented as spectral cells for three-dimensional measurement of the shape of the object.