Optical system and display apparatus

An optical system, comprising:

• a lens assembly, comprising at least two lenses, the at least two lenses comprising a first surface, a first attachment surface and a second surface arranged in sequence along a direction of an optical axis of the lens assembly;
• a transflective film, provided on a side of the first surface away from the second surface;
• a reflective polarizing layer, provided on a side of the second surface away from the first surface;
• and
• a phase retardation film, provided on the first attachment surface;
• wherein the first attachment surface is a plane which intersects with and is not perpendicular to the optical axis of the lens assembly.

A display apparatus, comprising a display screen and an optical system,

• the optical system comprising:
• a lens assembly, comprising at least two lenses, the at least two lenses comprising a first surface, a first attachment surface and a second surface arranged in sequence along a direction of an optical axis of the lens assembly;
• a transflective film, provided on a side of the first surface away from the second surface;
• a reflective polarizing layer, provided on a side of the second surface away from the first surface;
• and
• a phase retardation film, provided on the first attachment surface;
• wherein the first attachment surface is a curved surface, and a ratio of a minimum value of a curvature radius of the first attachment surface to a curvature radius of the second surface is not less than 3;
• a display surface of the display screen is located on the side of the first surface away from the second surface.