US 11,693,168 B2
Optical assembly
Gregg A. Ambur, River Falls, WI (US); Benjamin G. Sonnek, Mahtomedi, MN (US); Jo A. Etter, Kirkland, WA (US); Timothy L. Wong, St. Paul, MN (US); Thomas P. Klun, Lakeland, MN (US); Richard J. Pokorny, Maplewood, MN (US); Benjamin R. Coonce, South St. Paul, MN (US); Douglas S. Dunn, Woodbury, MN (US); Henry A. Kostalik, IV, Minneapolis, MN (US); Christopher S. Degraw, Eagan, MN (US); John R. Jacobson, Newport, MN (US); and Chunjie Zhang, Shoreview, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 16/755,843
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Oct. 3, 2018, PCT No. PCT/US2018/054162
§ 371(c)(1), (2) Date Apr. 13, 2020,
PCT Pub. No. WO2019/079033, PCT Pub. Date Apr. 25, 2019.
Claims priority of provisional application 62/574,921, filed on Oct. 20, 2017.
Prior Publication US 2021/0208320 A1, Jul. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/30 (2006.01); B29D 11/00 (2006.01); G02B 5/28 (2006.01); G02B 1/14 (2015.01); G02B 1/04 (2006.01)
CPC G02B 5/305 (2013.01) [B29D 11/0073 (2013.01); B29D 11/00548 (2013.01); B29D 11/00865 (2013.01); G02B 1/041 (2013.01); G02B 1/14 (2015.01); G02B 5/285 (2013.01)] 21 Claims
OG exemplary drawing
 
12. An optical assembly, comprising:
an integrally formed multilayer optical film, the optical film comprising a plurality of alternating polymeric layers reflecting or transmitting light primarily by optical interference; and
an optical element insert molded directly onto the optical film, the optical film being diffusion bonded to the optical element,
wherein the bonding of the optical film to the optical element is stronger than an interlayer bonding between at least one pair of immediately adjacent layers in the optical film.