×

Scanning phase measuring method and system for an object at a vision station

  • US 5,646,733 A
  • Filed: 01/29/1996
  • Issued: 07/08/1997
  • Est. Priority Date: 01/29/1996
  • Status: Expired
First Claim
Patent Images

1. A method for high speed, scanning phase measuring of an object at a vision station to develop physical information associated with the object, the method comprising the steps of:

  • projecting a pattern of imagable electromagnetic radiation with at least one projector;

    moving the object relative to the at least one projector at a substantially constant velocity at the vision station so as to scan the projected pattern of electromagnetic radiation across a surface of the object to generate an imagable electromagnetic radiation signal;

    receiving the imagable electromagnetic radiation signal from the surface of the object with a detector having a plurality of separate detector elements which are substantially uniformly spaced;

    maintaining the at least one projector and the detector in a substantially fixed relation to each other;

    measuring an amount of radiant energy in the received electromagnetic radiation signal with the detector wherein each of the detector elements produce an image having a different phase of the same scanned surface based on the measurement; and

    computing phase values and amplitude values for the different phases from the multiple images.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×