A proofreading device and a method for proofreading the camera for dentistries

Japanese Patent JP6170566

B2

The invention relates to a method and a calibration device for calibrating a dental camera (1), which is based on a fringe projection method for optically measuring a dental object (10) in three dimensions, comprising a projection grid (2) for generating a projection pattern (3) that consists of a plurality of fringes (5), and an optical system (4) that projects the generated projection pattern (3) onto the object (10) to be measured. In a first step, a reference surface (74) with known dimensions is measured by the dental camera (1) using the fringe projection method. Actual coordinates (33, 36) of a plurality of measurement points (11) are determined on the reference surface (74), and the determined actual coordinates (33, 36) are compared to target coordinates (34) of the measurement points (11) on the reference surface (74). In the following method step, proceeding from the deviations (35, 37) between the actual coordinates (33, 36) and the target coordinates (34), a plurality of compensation values (40, 50, 51, 52, 53) are calculated for the individual fringes (5) of the projection pattern (3).

Bjorun, Popirka
Teal, frank
Forster, frank

JP2015540140A

July 26, 2017

November 04, 2013

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Sirona Dental Systems Gesellschaft Mitt Beschlenktel Haftung

A61C19/04; G01B11/00; G01B11/25

JP2000509505A
JP2011504586A
JP2003532125A
JP200754637A
JP2008170209A
JP2012530267A
JP2008514339A

US5991437
US20080062434
DE19536297A1

Ryoichi Takaoka
Nao Oda
Kaoru Takahashi

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