Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: The invention discloses a light guide plate structure. The light guide plate structure includes a light-receiving surface, a light-emitting surface and a light-reflecting surface. The light-receiving surface receives emitting light from at least a light source, and the light propagating in the light guide plate exits through the light-emitting surface. The light-reflecting surface is opposite to the light-emitting surface for guiding the light that passes through the light-receiving surface to the light-emitting surface. The light-emitting surface and/or the light-reflecting surface include at least a composite structure. The composite structure includes a primary structure and a secondary structure where the secondary structure is disposed to a side of the primary structure.