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|1. (WO2017039711) OPTICAL SYSTEM|
|Applicants:||3M INNOVATIVE PROPERTIES COMPANY
|Inventors:||WONG, Timothy L.
OUDERKIRK, Andrew J.
MCDOWELL, Erin A.
AMBUR, Gregg A.
Optical systems including first and second optical stacks and adapted to provide an adjustable dioptric correction are described. The first optical stack includes a first optical lens and a partial reflector. The second optical stack is convex along orthogonal first and second axes and includes a second optical lens and a reflective polarizer. The reflective polarizer has at least one first location having a radial distance r1 from an optical axis of the second optical stack and a displacement s1 from a plane perpendicular to the optical axis at an apex of the reflective polarizer, where s1/r1 is at least 0.1. A quarter wave retarder is disposed between the second optical stack and the first optical stack.