Virtual reality apparatus

A virtual reality apparatus, comprising a first optical system and a second optical system, wherein,

• the first optical system sequentially comprises, along a first optical axis from a first side to a second side, a first lens having a positive refractive power, a reflective polarizing element, a quarter wave plate, a second lens having a refractive power and a third lens having a positive refractive power;
• the second optical system sequentially comprises, along a second optical axis from an object side to an image side:
• a first lens element having a negative refractive power, an object-side surface of the first lens element being a convex surface, and an image-side surface of the first lens element being a concave surface;
• a second lens element having a negative refractive power, an image-side surface of the second lens element being a concave surface;
• a third lens element having a positive refractive power;
• a fourth lens element having a positive refractive power, an image-side surface of the fourth lens element being a convex surface;
• a fifth lens element having a refractive power, an object-side surface of the fifth lens element being a convex surface;
• a sixth lens element having a negative refractive power, an object-side surface of the sixth lens element being a concave surface;
• a seventh lens element having a positive refractive power, an object-side surface of the seventh lens element being a convex surface, and an image-side surface of the seventh lens element being a convex surface;
• and
• an eighth lens element having a refractive power;
• wherein, a number of lenses having refractive powers in the first optical system is three and a number of lens elements having refractive powers in the second optical system is eight;
• a real image formed by the second optical system is transmitted in a form of an electrical signal to a display screen on the second side of the first optical system, and the first optical system is used to project an imaginary image of the display screen and the real image transmitted to the display screen;
• a total effective focal length f′ of the first optical system, a radius of curvature R1′ of a first side surface of the first lens, a total effective focal length f of the second optical system, and a radius of curvature R1 of the object-side surface of the first lens element satisfy:
• −0.2<(f′/R1′)/(f/R1)<1.3.