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. 15, 2008
Filed:
Feb. 23, 2006
Applicants:
Osamu Masuda, Machida, JP;
Kazumi Furuta, Akishima, JP;
Makiko Imae, Hino, JP;
Inventors:
Assignee:
Konica Minolta Holdings, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wide-band wave plate having at least two wave plates, each of which has a microstructure to generate a phase difference, the microstructure having a cycle not shorter than 1/nof a shortest wavelength of light in use, wherein the two wave plates are arranged to face opposite with their main axes in non-parallel with each other, wherein nis a refractive index of a wave plate material with respect to the shortest wavelength.