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:
Jan. 13, 2009
Filed:
Aug. 30, 2005
Hans-georg Lotz, Gründau-Rothenbergen, DE;
Jürgen Schroeder, Groβkrotzenburg, DE;
Hans-Georg Lotz, Gründau-Rothenbergen, DE;
Jürgen Schroeder, Groβkrotzenburg, DE;
Abstract
The present invention relates to a method of determining physical properties of an optical layer or layer system by means of spectral transmission and/or reflection measurements, whereby in accordance with the spectrum of the transmission and/or reflection measurement, reference values for the wavelength-dependent refractive indices nand/or extinction coefficients kare chosen from known values or are determined experimentally and the variation that characterizes the layer is described by wavelength-independent variation constants Kand Kfor the refractive indices and extinction coefficients.