US 12,094,238 B2
Optical constructions for display systems
Kristy A. Gillette, Spring Valley, WI (US); Zhaohui Yang, North Oaks, MN (US); Encai Hao, Woodbury, MN (US); and William J. Gray, Woodbury, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on May 10, 2023, as Appl. No. 18/195,475.
Claims priority of provisional application 63/342,219, filed on May 16, 2022.
Prior Publication US 2023/0368569 A1, Nov. 16, 2023
Int. Cl. G06K 9/00 (2022.01); G02B 3/00 (2006.01); G02B 5/00 (2006.01); G02B 5/20 (2006.01); G06V 40/13 (2022.01)
CPC G06V 40/1324 (2022.01) [G02B 3/0056 (2013.01); G02B 5/003 (2013.01); G02B 5/208 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An integral optical construction comprising:
a lens layer comprising a structured first major surface comprising a plurality of microlenses arranged two-dimensionally across the lens layer;
an optically opaque mask layer disposed on the lens layer and defining a plurality of through physical first openings therein, each of the first openings extending from a first major surface of the mask layer facing the lens layer to an opposite second major surface of the mask layer, the first openings in a one-to-one correspondence with the microlenses, regions of the mask layer between the first openings having an optical density of greater than about 2 for at least a first visible wavelength in a visible wavelength range extending from about 420 nm to about 680 nm; and
a first optical adhesive layer disposed on, and making physical contact with, the second major surface of the mask layer, the first optical adhesive layer defining a recess therein at each of the first openings, each recess comprising a closed bottom and an opposite open top open to the first opening corresponding to the recess.