| 摘要 |
PROBLEM TO BE SOLVED: To provide a screen filter made of a special prism lens for stereoscopic vision, capable of obtaining a sufficient 3D effect.SOLUTION: A screen filter made of a special lens comprises: a screen filter 3 made of a special prism lens formed as a Fresnel-lens; and surfaces 2 curved in a cylindrically curved surface shape in a longitudinal direction, and has not only 3D-conversion characteristics generating a parallax between both eyes by the lens shape of the screen filter made of the special prism lens, but also a first surface processed in a cylindrically curved surface shape of which the curvature is concentric in a transverse direction, uniform and gentle. A method curving a second flat surface of the screen filter in a cylindrically curved surface shape of which the curvature is concentric in the longitudinal direction, uniform and gentle is combined with the screen filter made of the special prism lens. |
