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:
Aug. 10, 2010
Filed:
Aug. 30, 2006
Andrew J. Ouderkirk, Woodbury, MN (US);
Gregory L. Bluem, St. Paul, MN (US);
Robert L. Brott, Woodbury, MN (US);
Patrick R. Fleming, Lake Elmo, MN (US);
Joan M. Frankel, Woodbury, MN (US);
Shandon D. Hart, Maplewood, MN (US);
William J. Kopecky, Hudson, WI (US);
Huiwen Tai, Woodbury, MN (US);
Margaret M. Vogel-martin, Forest Lake, MN (US);
Daniel J. Zillig, Cottage Grove, MN (US);
Andrew J. Ouderkirk, Woodbury, MN (US);
Gregory L. Bluem, St. Paul, MN (US);
Robert L. Brott, Woodbury, MN (US);
Patrick R. Fleming, Lake Elmo, MN (US);
Joan M. Frankel, Woodbury, MN (US);
Shandon D. Hart, Maplewood, MN (US);
William J. Kopecky, Hudson, WI (US);
Huiwen Tai, Woodbury, MN (US);
Margaret M. Vogel-Martin, Forest Lake, MN (US);
Daniel J. Zillig, Cottage Grove, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A polarizing film is made of multilayer polarizing fibers embedded within a matrix. The fibers are formed with layers of at least a first and a second polymer material. Layers of the first polymer material are disposed between layers of the second polymer material. At least one of the first and second polymer materials is birefringent. In some embodiments the thickness of the layers of at least one of the materials varies across the fiber, and may include layers are selected as quarter-wavelength thickness for light having a wavelength of more than 700 nm.