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:
Oct. 24, 2000
Filed:
Jun. 23, 1998
Hideyuki Takaoka, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An optical system having a polarization compensating optical system capable of compensating for retardation with high accuracy. The polarization compensating optical system includes a half-wave plate (22), a first optical system (23a) having at least one uncoated refracting surface (26, 27), and a second optical system (23b) having at least one coated refracting surface (24, 25). The total rotation of the polarization plane introduced in rays passing through the entire optical system is reduced to approximately zero by rotation of the polarization plane produced by the first optical system (23a), and the total retardation introduced in the rays is reduced to approximately zero by retardation produced by the second optical system (23b).