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:
Sep. 14, 1999
Filed:
Oct. 01, 1997
Applicant:
Inventors:
Assignee:
Optimet, Optical Metrology Ltd., Jerusalem, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ; G03H / ; G02B / ;
U.S. Cl.
CPC ...
359 30 ; 359 35 ; 359497 ; 359494 ;
Abstract
A linear conoscope producing a conoscopic interferogram of an object wherein the phase shift giving rise to the interferogram is substantially linearly dependent on displacement of an object from a geometrical axis. Two anisotropic optical elements are provided and oriented with respect to one another in such a manner as to cancel the predominant term in which the phase shift depends quadratically on displacement from the geometrical axis.