3m Innovative Properties Company

Ryan J Eismin

Hiroki Matsuda

Adam D Haag

Matthew B Johnson

Yi-Chen Chen

Michelle Lund Toy

John F VanDerlofske, Iii

Tze Yuan Wang

David J McDaniel

John F Iii Vanderlofske

David J Mcdaniel

An optical film includes a plurality of alternating first and second polymeric layers, such that the first polymeric layers have a smaller average in-plane index of refraction than the second polymeric layers and the first polymeric layers have a glass transition temperature of at least 107 deg. C. The optical film may be a reflective polarizer. An optical stack includes a linear absorbing polarizer and the reflective polarizer disposed on, and bonded to, the absorbing polarizer. The reflective polarizer has an optical reflectance of at least 60% for a first polarization state and an optical transmittance of at least 60% for an orthogonal second polarization state. When heated at 105 deg. C. for 15 minutes, a difference in shrinkage of the reflective polarizer and the absorbing polarizer along the first and second polarization states is greater than about zero and 0.2%, respectively.

Optical film and optical stack

Growing community of inventors

Saint Paul, MN, United States of America

Ryan J Eismin