Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1981-07-24
1984-09-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356376, G01N 2186
Patent
active
044737505
ABSTRACT:
A three-dimensional shape measuring device comprises a light beam condensing and irradiating system for irradiating a light beam to an object at a fixed angle .theta. and converging the light beam to a desired minimum diameter at a point A on an optical axis of the light beam, an imaging optical system having an optical axis having an angle .phi. different from the angle .theta. and including the point A on the optical axis thereof, for focusing the point A on an effectively constant aperture of a detecting light screen or on a small area, aperture-transmitted light detecting means or photo-electric converter means for detecting light transmitted through the aperture or the small area, detecting position changing means for changing a relative position between the object and the point A, maximum value detecting means for detecting a maximum value of the signal detected by the aperture-transmitted light detecting means or the photo-electric converter means and detection means for detecting a change in the detecting position caused by the detecting position changing means at a time when the maximum value detecting means detects the maximum value. The change in the detecting position is sequentially detected by the detecting means for each of a plurality of points on the surface of the object to measure the three-dimensional shape of the object.
REFERENCES:
patent: 3355590 (1967-11-01), Bertram
patent: 4136949 (1979-01-01), Hayamizu et al.
patent: 4325640 (1982-04-01), Dreyfus et al.
patent: 4375921 (1983-03-01), Morander
Isoda Kenichi
Kawata Yoichi
Oshida Yoshitada
Umehara Noboru
Watanabe Shinobu
Hitachi , Ltd.
Nelms David C.
LandOfFree
Three-dimensional shape measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Three-dimensional shape measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-dimensional shape measuring device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1770928