Visual optical system and virtual reality device with visual optical system

A visual optical system, comprising a first lens, a composite film layer, a second lens, and a partially reflective film in sequence from a first side to a second side along an optical axis;

• wherein each of the first lens and the second lens has a positive refractive power, a first side surface located on the first side, and a second side surface located on the second side;
• the composite film layer is arranged on a second side surface of the first lens, the composite film layer comprises a polarizing reflective film and a quarter-wave plate, and the polarizing reflective film is located between the first lens and the quarter-wave plate;
• the partially reflective film is arranged on a second side surface of the second lens, and the second side surface of the second lens is a convex surface and also a Fresnel surface;
• and
• an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy:
• 0.75<f1/f2<3.15.