| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a depth-enhancing screen (101) for producing a simulated 3D image. <P>SOLUTION: The screen comprises a multi-curved Fresnel lens (103) which, when viewed in cross-section along the or each longest line linking two points on the edge of the lens, has a curved cross-section with an apex in the central region of the lens, and wherein each end of the curve flattens before it reaches the edge of the lens. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
