System for three-dimensional measurement of inaccessible hollow

Details System for three-dimensional measurement of inaccessible hollow System for three-dimensional measurement of inaccessible hollow

1997-12-02

2000-03-28

Kim, Robert

Optics: measuring and testing

By polarized light examination

With light attenuation

356372, 356379, G01B 1124

Patent

active

060438916

ABSTRACT:
A system for three-dimensional measurement of inaccessible hollow spaces g. sewage canal pipes) by means of a light source and a camera, which are disposed on an inspection head or carrier. A structured light source is used, and the camera and the structured light source have a common entry and exit aperture and have before the aperture at least partially one common optical axis or parallel axes, the distance between which is substantially smaller than the distance between the source point of the pattern and the object-side principle plane of the camera lens.

REFERENCES:
patent: 4784463 (1988-11-01), Miyazaki
patent: 5052803 (1991-10-01), Krauter
patent: 5195392 (1993-03-01), Moore et al.
patent: 5424836 (1995-06-01), Weise et al.

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