Method and apparatus for surveying the surface of an object by p

Details Method and apparatus for surveying the surface of an object by p Method and apparatus for surveying the surface of an object by p

1990-01-17

1991-03-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 2186

Patent

active

050031872

ABSTRACT:
For sensing the surface of an object, a number of gratings with linear line patterns of different periods on a common carrier are successively projected onto the surface. Images of the line patterns deformed at the object surface are detected and stored by a television camera and evaluated by an electronic circuit. The evaluation comprises computing, from the residual phases of the object points within each fringe of the linear pattern, the absolute heights of these points with respect to a common reference plane.

REFERENCES:
patent: 4895448 (1990-01-01), Laird
"Interferometric Optical Phase Measurement Techniques", Dissertation of C. L. Koliopoulos, Univ. of Arizona, 1981.

Affiliated with

Also associated with

Rating

Method and apparatus for surveying the surface of an object by p does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for surveying the surface of an object by p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for surveying the surface of an object by p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-619174