Title:
THREE-DIMENSIONAL SHAPE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3922784
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a three-dimensional shape measuring device for moving an object and measuring the height of the object by phase shift, and also prevent the dead angle due to the change of incident angle of illumination associated with the movement of the object to keep the precision.
SOLUTION: In a device for measuring the three-dimensional shape of a measuring mobile object 1, this device is provided with illumination means (a light source 3, a lens 4, a filter 5) for illuminating substantially parallel lights having a sine wave pattern light intensity distribution of a prescribed period in the moving direction of the object 1 to the object 1 from above, image pickup means for taking the image of the object 1 (a camera 6, a lens 7), an image memory for storing images taken every movement by distances corresponding to at least four phases (preferably, phases 0, π/2, π, 3π/2) of the object 1, and an arithmetic means for finding the height from the images within the image memory by phase shift.
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Inventors:
Tomohiro Yasuda
Kazushige Yoshimura
Ryosuke Mitaka
Kazushige Yoshimura
Ryosuke Mitaka
Application Number:
JP1462298A
Publication Date:
May 30, 2007
Filing Date:
January 27, 1998
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
G01B11/25; G01B11/30; G01B11/24; G01B21/00; (IPC1-7): G01B11/30; G01B11/24; G01B21/00
Domestic Patent References:
| JP498111A | ||||
| JP921620A |
Foreign References:
| WO1997028421A1 |
Attorney, Agent or Firm:
Masahiko Kurata
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