主权项 |
1. A projection screen comprising:
a reflector; and a plurality of compound lenses arranged at the same side of the reflector in an array manner, each of the compound lenses having a first lens portion and a second lens portion, the first lens portion being disposed between the second lens portion and the reflector, a surface of the first lens portion opposite to the reflector having a first radius of curvature, and a surface of the second lens portion opposite to the reflector having a second radius of curvature, the first radius of curvature having a length greater than the second radius of curvature; wherein the first lens portion is a convex lens portion, and a lens pupil is imaged by the compound lenses and enlarges to the viewing zone of the projection screen. |