Optical device and near-eye display apparatus

A near-eye display apparatus, comprising a light generator;

• and an optical device;
• wherein the optical device comprises:
• a light guide component and a focusing assembly;
• wherein the focusing assembly comprises:
• a semi-transmissive and semi-reflective face and a reflecting face which are oppositely arranged, wherein the semi-transmissive and semi-reflective face is arranged within the light guide component, and the reflecting face is arranged on a side of the light guide component away from a coupling-out side, and is spaced apart from the light guide component;
• and
• a driving mechanism for driving the reflecting face to move relative to the semi-transmissive and semi-reflective face, wherein the semi-transmissive and semi-reflective face and the reflecting face are both curved faces;
• wherein a light in the light guide component propagates to the semi-transmissive and semi-reflective face, is reflected by the semi-transmissive and semi-reflective face to the reflecting face, is reflected by the reflecting face, and then transmitted through the semi-transmissive and semi-reflective face and emitted from the light guide component;
• and
• wherein a light emitted by the optical device propagates into the light guide component.