| 摘要 |
PROBLEM TO BE SOLVED: To provide a reflective type screen that can display good video with high uniformity and can conform to a plurality of different short-focus type video projection devices, and a video display system provided with the same.SOLUTION: A reflective type screen 10 comprises a reflecting layer 12 and a lens layer 11 with a circular Fresnel lens shape. In the screen, when r (mm) is the radius from a point C being the Fresnel center of a lens surface 112, an angle α (°) formed between the lens surface 112 of a unit lens 111 and a plane parallel to the screen surface is within a range of -3.20779089934252×10×r+1.70966116372389×10×r-3.57230633930145×10×r+0.0422019282210293×r-0.544381670028088±5(°).SELECTED DRAWING: Figure 1 |
