OPTICAL SYSTEM

摘要

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.

主权项

1. An optical system, comprising:a first optical stack, the first optical stack comprising:
a first optical lens; and a partial reflector having an average optical reflectance of at least 30% in a desired plurality of wavelengths; anda second optical stack disposed adjacent to the first optical stack and convex along orthogonal first and second axes, the second optical stack comprising:
a second optical lens; a reflective polarizer substantially transmitting light having a first polarization state and substantially reflecting light having an orthogonal second polarization state, at least one first location on the reflective polarizer 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, s1/r1 being at least 0.1; anda first quarter wave retarder disposed between the second optical stack and the first optical stack, wherein the optical system is adapted to provide an adjustable dioptric correction.