公开(公告)号：DE60021417T2

公开(公告)日：2006-05-24

申请号：DE60021417

申请日：2000-12-08

Applicant: X RITE INC

Inventor： OVERBECK L ,  GALEN A ,  VAN ANDEL J ,  BOES L

IPC: A61B5/00 ,  G01J3/51 ,  A61B1/00 ,  A61B1/04 ,  A61B1/24 ,  G01N21/27 ,  G01N21/57

Abstract: An instrument and related process for measuring color, shade, gloss, shape and/or translucence of a tooth. First, the instrument uses searchlight illumination to illuminate a tooth with constant irradiance. Second, the instrument uses calorimetric imaging to collect time-separated frames of different wavelengths of light reflected from a tooth and to combine those frames into a color image. Third, the instrument includes a sanitary shield to establish a reference color and a predetermined distance to a target tooth. Fourth, the instrument provides line-of-sight viewing so an operator may simultaneously view a display of the image on the instrument and the object being measured. Fifth, the instrument is impervious to pollutants because it incorporates a sealed measurement window. Sixth, optical measurements of a tooth taken by a dentist are compared to optical measurements of a prosthetic restoration for that tooth to confirm satisfactory matching of optical characteristics of the tooth and restoration.

公开(公告)号：DE60021417D1

公开(公告)日：2005-08-25

申请号：DE60021417

申请日：2000-12-08

Applicant: X RITE INC

Inventor： OVERBECK L ,  GALEN A ,  VAN ANDEL J ,  BOES L

IPC: G01J3/51 ,  A61B1/00 ,  A61B1/04 ,  A61B1/24 ,  A61B5/00 ,  G01N21/27 ,  G01N21/57

Abstract: An instrument and related process for measuring color, shade, gloss, shape and/or translucence of a tooth. First, the instrument uses searchlight illumination to illuminate a tooth with constant irradiance. Second, the instrument uses calorimetric imaging to collect time-separated frames of different wavelengths of light reflected from a tooth and to combine those frames into a color image. Third, the instrument includes a sanitary shield to establish a reference color and a predetermined distance to a target tooth. Fourth, the instrument provides line-of-sight viewing so an operator may simultaneously view a display of the image on the instrument and the object being measured. Fifth, the instrument is impervious to pollutants because it incorporates a sealed measurement window. Sixth, optical measurements of a tooth taken by a dentist are compared to optical measurements of a prosthetic restoration for that tooth to confirm satisfactory matching of optical characteristics of the tooth and restoration.