Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
  • A43D1/00—Foot or last measuring devices; Measuring devices for shoe parts
  • A43D1/02—Foot-measuring devices
  • A43D1/025—Foot-measuring devices comprising optical means, e.g. mirrors, photo-electric cells, for measuring or inspecting feet
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B5/00—Measuring for diagnostic purposes; Identification of persons
  • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
  • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
  • A61B5/1077—Measuring of profiles
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B11/00—Measuring arrangements characterised by the use of optical techniques
  • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
  • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
  • G01B11/2518—Projection by scanning of the object

Definitions

• Appliance for digitising of curved and plane surfaces Appliance for digitising of curved and plane surfaces.
• the invention concerns an appliance for digitising of curved or plane surfaces.
• the appliance based on a flatbed scanner where provisions are furnished to digitise for instance the form of the sole of a foot.
• An appliance of this type is known from the publication US 6,205,230.
• this appliance is the rainbow beam of a prism used.
• a problem of this appliance is that the rainbow beam shows no sharp boundaries.
• the invention uses the possibility to scan the object in a plane, perpendicular to the plane of the track of the scan head and to scan at a small angle in reference to the first scan in the direction of the movement of the scan head.
• a shift in the direction of the scan head which is proportional to the distance between scan head and the object to be digitised. This is particularly in the case where the direction of the scan is not changed while scanning.
• With a transformation program the digital information of both the scans can be converted to a three-dimensional image of the object.
• the invention uses a simple prism to create a triangular measuring of which the precision is determined by the fineness of the scan.
• the adaptations to the scanner to be used are minimal so commercial available scanners can be used.
• An execution of the invention foresees the scanner of a structure which is foreseen of an elastic film with a line pattern where the film is pressed against the to be digitised object with for instance compressed gas.
• the surface of the film is scanned by which a number of prisms which are placed on the scan head divides the scan in strips.
• the prisms cause a shift of the image through what the distance between scan head and object can be calculated.
• Fig. 1 shows a cross section through a part of the scanner and structure.
• Fig. 2 shows an execution of the prism.
• Fig. 3 shows a cross section through the prism.
• Fig. 4 shows the principle of measuring.
• Fig. 5 shows a transverse section of the film.
• Fig. 6 shows the outcome of the scan for calculation.
• FIG. 7 shows a cross section of a thickened line.
• Fig. 1 is the structure indicated with (1).
• film (2) On film (2) is made a line pattern (3) which consists of lines which are perpendicular to the direction of the scan. It can be useful to have a pattern of squares in some cases.
• Air can be pumped between glass plate (4) and film (2) to press the film close to the object to be scanned.
• scan head (5) On scan head (5) are placed a number of narrow prisms (6).
• the prisms (6) cause a deflection of the light in the direction (13) of the movement of the scan head (5).
• the prisms can be combined into one element to execute prism (6) as a wedge with notches (7).
• prism (6) The effect of prism (6) is that the concerned partition of the line (3) on the film is recorded at an other position of the scan head than the partitions of the line (3) which are recorded direct by the scan head (5).
• Fig. 4 is with (8) indicated the position of the scan head (5) where the line (3) is recorded via the prism.
• line (3) is recorded direct.
• the image that comes into being at the position of an impression as in Fig. 5 is one of a line (3) that is recorded as two interrupted lines (10, 11) as in Fig. 6.
• the relative distance of the two interrupted lines (10, 11) is a size for the distance between scan head (5) and the to be measured object.
• the interrupted line (10) the recorded line through the prism.
• Fig. 1 is a practical situation shown where the elastic film (2) has a distance of 41 millimetre from the scan head (5).
• the surface of glass plate (4) is 11 millimetre above the scan head (5).
• the deflection (12) on the level of the elastic film (2) is here 3 millimetre. This means that on a distance of 11 millimetre the relative distance between the interrupted lines (10) and (11) 0.8 millimetre is. In this case the possible variation of the relative distance between the interrupted lines (10, 11) is from 0.8 to 3 millimetre.
• a variant of the invention makes use of a prism without notches where first a scan is made with prism and after that another scan without prism. This way pairs of lines come into being where the relative distance a size is for the distance to the scan head (5).
• a second variant uses scanners which have a double scan head where the second scan head is foreseen with a elongated prism or that the scan head is placed under an angle between 2 to 15 degrees in relation to the direction of the scan.
• a third variant foresees into a adjustable optic where a second scan is made under a small angle.
• the appliance is very suitable to digitise for instance the sole of a foot to manufacture arch supports. In this case it is profitable to foresee the elastic film with thickened lines (3) as is indicated in Fig. 7, so to derive the local pressure from the width of the line (3) for a foot which is loaded and pressed onto the glass plate (4).
• the invention is not restricted to the digitising of parts of the body but can also with profit be used to digitise other articles and to digitise surface qualities such as form and deformity.
• the invention is a profitable, compact and efficient appliance to scan local in shops sole of feet to manufacture arch supports.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Physics & Mathematics (AREA)
• Biophysics (AREA)
• Engineering & Computer Science (AREA)
• Medical Informatics (AREA)
• Surgery (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Dentistry (AREA)
• Molecular Biology (AREA)
• Pathology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Computer Vision & Pattern Recognition (AREA)
• General Physics & Mathematics (AREA)
• Length Measuring Devices By Optical Means (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=29244986

Family Applications (1)

Country Status (4)

Cited By (9)

Citations (6)

• 2002
  • 2002-04-15 NL NL1020394A patent/NL1020394C2/nl not_active IP Right Cessation
• 2003
  • 2003-03-25 AU AU2003225413A patent/AU2003225413A1/en not_active Abandoned
  • 2003-03-25 WO PCT/NL2003/000222 patent/WO2003087717A1/en not_active Application Discontinuation
  • 2003-03-25 EP EP03746500A patent/EP1506368A1/en not_active Withdrawn

Patent Citations (6)

Non-Patent Citations (1)

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