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:
Nov. 27, 1990
Filed:
Oct. 04, 1989
Kiyokazu Sakai, Nishinomiya, JP;
Shigeyoshi Osaki, Takarazuka, JP;
Abstract
The combination of a polarizer and an analyzer, and a sample interposed therebetween are rotated relative to each other to determine the relationship between the angle of rotation and the intensity of light transmitted through the arrangement. The birefringence of the sample is obtained from the retardation values calculated from the result of the determination. When the determination is made for two kinds of light with different wavelengths close to each other, the retardation can be determined straightforwardly. When at least three kinds of light with different wavelengths are used for the determination, different retardation values are obtained for the respective wavelengths for a highly accurate analysis.