| abstract |
An optical device is disclosed. The optical device includes a first lens, a first display device, and a first active mirror, wherein the first lens has a first surface and a plurality of side surfaces, and the first display device is arranged on a first side of the side surfaces of the first lens surface, and the first active mirror is arranged in the first lens. The first active mirror is tilted at a first angle during the first period and tilted at a second angle during the second period. |