Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1987-09-09
1989-06-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356 4, G01N 2186
Patent
active
048395250
ABSTRACT:
A method of and an apparatus for measuring the coordinates of each edge of a tape is disclosed. The method comprises the steps of attaching a tape to a surface of an object, such as a three-dimensional subject, to be measured in such a manner that at least one edge of the tape is placed along a measurement line, such as an edge, on the surface, the tape and the surface differing from each other in reflectance; projecting a deflected spot beam onto the area of the surface of the object including the edges of the tape; and detecting the portion of the area the reflectance of which sharply varies, thereby calculating the two-dimensional coordinates of the thus-detected values. Accordingly, it is possible to accurately measure the three-dimensional configuration along the measurement line.
REFERENCES:
patent: 4136949 (1979-01-01), Hayamizu et al.
patent: 4212534 (1980-07-01), Bodlaj
patent: 4425043 (1984-01-01), van Rosmalen
patent: 4732472 (1988-03-01), Konig et al.
Ito Hiroshi
Kano Yukio
Kishida Hideaki
Maeda Mitsutoshi
Yoshikawa Kuniyuki
Allen Stephone B.
Kabushiki Kaisha Tokai Rika Denki Seisakusho
Kabushiki Kaisha Toyota Chuo Kenkyusho
Nelms David C.
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