Optical stack and display system

A head-mounted display system comprising:

• a curved display emitting an image for viewing by an eye of a viewer;
• a first optical lens;
• a partial reflector having an average optical reflectance of at least 30% for at least one desired wavelength;
• and
• a reflective polarizer substantially transmitting light having a first polarization state and substantially reflecting light having an orthogonal second polarization state, the optical system having an optical axis,
• a first image ray emitted by the display and propagating along the optical axis passes through the first optical lens, the partial reflector and the reflective polarizer without being substantially refracted and passes through a pupil of the eye of the viewer,
• at least one second image ray emitted by the display and making a first oblique angle with the optical axis, passes through the first optical lens, the partial reflector, the reflective polarizer, and passes through the pupil of the eye of the viewer, such that a straight line coincident with the at least one second image ray intersects a facial feature of the viewer at an intersection point, the display disposed between the intersection point and the eye of the viewer.

A display system comprising:

• a curved display;
• a first optical lens;
• a partial reflector having an average optical reflectance of at least 30% for at least one desired wavelength;
• and
• a reflective polarizer substantially transmitting light having a first polarization state and substantially reflecting light having an orthogonal second polarization state, the optical system having an optical axis such that a light ray emitted by the curved display and propagating along the optical axis passes through the first optical lens, the partial reflector and the reflective polarizer without being substantially refracted, the first optical lens being rotationally asymmetric about the optical axis.