Rainbow generating device

The utility model discloses a rainbow generation device, which mainly has the structure that a reflecting mirror fixed mount is arranged at the inner side of the rear end of an outer casing, a hemisphere face reflecting mirror housing is equipped on the reflecting mirror fixed mount, a hemisphere face reflecting mirror is arranged on the inner side of the hemisphere face reflecting mirror housing, a power supply lamp post is arranged through a central through hole of the hemisphere face reflecting mirror and the hemisphere face reflecting mirror housing, a power supply light is arranged at the one end of the lamp post, an adjusting nut is arranged at the other end trough the outer side of the casing body, a lens screw hole is arranged at the front end of the casing body, a circular ring triple prism lens is equipped on the lens screw hole, the lens is composed of a circular ring triple prism arranged on a lens screw frame and a cone-shaped reflecting mirror arranged on the inner side of the cone-shaped reflecting mirror, a convex lens fixing mount is arranged between the power supply light and the lens screw hole, a convex lens is equipped on the fixing mount, a fixed seat is arranged at the lower part. A ventilation hole, a cooling fan, and a door are arranged on the casing body. The lens of the circular ring triple prism is changed and rearranged; a multi-circle rainbow pattern or a rainbow pattern with a central circular being white light can be obtained through irradiating on the lens of the circular ring triple prism. The utility model has the characteristics that the structure is simple, the operation is convenient, and the application is wide, etc.