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:
Dec. 02, 1997
Filed:
Aug. 27, 1996
Applicant:
Inventor:
Richard H Nadolink, Portsmouth, RI (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73800 ; 73777 ; 73841 ;
Abstract
A piece of single crystal silicon is embedded in a material such that the licon is flush with the surface thereof. The silicon is illuminated with infrared radiation having a wavelength in the range of 800-1100 nanometers. Isochromatic fringe patterns projected from the silicon are monitored as a direct indication of the amount of stress experienced at the surface.