초록 ▼

Disclosed is a system for the precision, high speed, non-contacting measurement of the shapes of reflective surfaces. This system consists of multiple laser fringe pattern transmitters, a random access image dissector camera or receiver, and a computer analysis system. Three laser transmitters proje

Disclosed is a system for the precision, high speed, non-contacting measurement of the shapes of reflective surfaces. This system consists of multiple laser fringe pattern transmitters, a random access image dissector camera or receiver, and a computer analysis system. Three laser transmitters project three fringe patterns onto a specimen surface such that the coordinates of the surface of the specimen can be obtained with an image dissector camera, imaged on the specimen, by separate measurement of the reflection by the surface from each transmitter. The computer analysis system decides which picture elements (pixels) are of interest, directs the receiver to “look at”those pixels, directs a digitizer to interrogate alternately the input numbers that are proportional to the coordinates of the specimen point. In a similar manner the shape of the entire specimen surface can be characterized and stored in computer memory.

대표청구항 ▼

Apparatus adapted for determining the contour of a light reflecting surface, comprising laser transmitter means for producing a light beam, means for expanding the beam and for projecting at least one fringe pattern onto the surface with the pattern moving in a predetermined direction and at a prede

Apparatus adapted for determining the contour of a light reflecting surface, comprising laser transmitter means for producing a light beam, means for expanding the beam and for projecting at least one fringe pattern onto the surface with the pattern moving in a predetermined direction and at a predetermined frequency, receiver means for observing different selected points on the surface and for producing an oscillatory signal corresponding to a fringe pattern component reflected by each surface point, means for determining the phase of the signal corresponding to each selected point with respect to the phase of a reference point, and means responsive to the phase of the signal for each selected point on the surface for determining a coordinate of the selected point.