Optical lens assembly for near-eye display and near-eye display device

A near-eye display device, comprising:

• a display screen configured to emit a first light to an optical lens assembly;
• and
• the optical lens assembly, comprising:
• a light box having a first layer facing a display screen of the near-eye display device and a second layer facing a diffractive optical element (DOE), the light box being configured to receive a first light from a display screen of the near-eye display device and transmit at least a portion of the first light to the DOE through a folded optical path, wherein the first layer and the second layer are flat;
• and
• the DOE aligned with an optical axis of an eye and configured to receive a second light from the light box and converge the second light to the eye,
• wherein the second layer of the light box comprises a first reflective polarizer, a second reflective polarizer, and a half-wave retarder placed in between the first reflective polarizer and the second reflective polarizer;
• and
• a polarization selectivity of the first reflective polarizer being orthogonal to a polarization selectivity of the second reflective polarizer.