The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1994
Filed:
Sep. 08, 1992
John M Fitts, Santa Monica, CA (US);
Other;
Abstract
A high-speed three-dimensional surface measurement system for use in determining the surface of an object from at least one electronic signal produced by a mini-moire sensor. At least one light source illuminates at least a surface area of the object with at least one fringe pattern. The light source has a hidden change distribution grating or matrix of gratings for producing the fringe pattern. The grating has hidden variations distributed substantially across the grating. The grating has a pseudo-random grating pattern in which a nominal fringe pattern has a small uniform period with the hidden variations distributed statistically across the grating. The hidden variations are so small that at any one point on the grating a noise-like value of the hidden variations is on the order of an overall noise equivalent phase value. A CCD camera receives reflected illumination from the surface area and provides an electronic signal representative of reflected illumination received thereby.