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:
May. 17, 1994
Filed:
Mar. 02, 1992
Guy H Hayes, New Hartford, CT (US);
Robert M Dixon, New Milford, CT (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A latent image scanner 10 comprising a three-color laser-diode interferometer 11 having either thickness gauge optical geometry 12 or profiler optical geometry 12a is focused on a spot on a surface of a reference optic 14 having a latent image residue thereon. The interferometry thickness gauge 10 or profiler 10a measures and records the height and location of the spot. The scanner 10 is then focused on a new spot by moving an associated X-Y mechanical translator 13. A complete scan of the surface of the reference optic 14 results in a three dimensional data array correlating height profile to X-Y coordinates of the surface of the reference optic 14. The difference between the absolute height profile and the known height of the reference optic 14 represents the latent image.