US 12,001,042 B2
Optical body including multilayer optical film and thin adhesive layer
Karissa L. Eckert, Ham Lake, MN (US); Michelle L Toy, North St. Paul, MN (US); Adam D. Haag, Woodbury, MN (US); Matthew B. Johnson, Woodbury, MN (US); Albert I. Everaerts, Tucson, AZ (US); and Quinn D. Sanford, Mosinee, WI (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Aug. 1, 2022, as Appl. No. 17/878,347.
Application 17/878,347 is a division of application No. 16/619,155, abandoned, previously published as PCT/US2018/036008, filed on Jun. 5, 2018.
Claims priority of provisional application 62/515,407, filed on Jun. 5, 2017.
Prior Publication US 2022/0373728 A1, Nov. 24, 2022
Int. Cl. G02B 5/30 (2006.01); C09J 7/29 (2018.01); C09J 201/02 (2006.01); B32B 37/12 (2006.01); C09J 133/00 (2006.01); C09J 133/08 (2006.01)
CPC G02B 5/305 (2013.01) [C09J 7/29 (2018.01); C09J 201/02 (2013.01); B32B 2037/1253 (2013.01); B32B 2307/40 (2013.01); B32B 2307/42 (2013.01); B32B 2307/538 (2013.01); B32B 2457/20 (2013.01); B32B 2457/202 (2013.01); C09J 133/00 (2013.01); C09J 133/08 (2013.01); C09J 2301/302 (2020.08); C09K 2323/03 (2020.08); C09K 2323/031 (2020.08); C09K 2323/05 (2020.08); C09K 2323/057 (2020.08); C09K 2323/06 (2020.08); C09K 2323/061 (2020.08)] 6 Claims
OG exemplary drawing
 
1. An optical body, comprising:
a birefringent multilayer optical film;
a continuous adhesive layer disposed on a first major surface of the birefringent multilayer optical film; and
a glass or plastic substrate layer attached to the multilayer optical film via the continuous adhesive layer;
wherein the continuous adhesive layer has a thickness less than 20 micrometers; and
wherein the optical body, measured through the glass or plastic substrate layer with an interferometer, has a peak-to-valley surface roughness of less than 50 nm.