Polymethyl methacrylate spherical reflecting mirror and preparation method

The invention discloses a polymethyl methacrylate spherical reflecting mirror and a preparation method thereof and belongs to the flight simulator virtual image display system reflecting medium technical field. The spherical reflecting mirror comprises a supporting plate and a polymethyl methacrylate spherical lens; a surface of the supporting plate is an inwards-recessed spherical surface; an outwards-protruding surface of the polymethyl methacrylate spherical lens is fittingly attached to the inwards-recessed spherical surface of the supporting plate; and the surface of the polymethyl methacrylate spherical lens, which is fittingly attached to the supporting plate, is coated with a metal film. The spherical reflecting mirror has the advantages of high strength, easiness in cleaning and maintenance and continuous imaged pictures. With the spherical reflecting mirror adopted, images imaged at corners will not be deformed. The size of the spherical reflecting mirror can be set according to requirements, and therefore, requirements of super-large field-of-view virtual image display systems can be satisfied.