| 摘要 |
PROBLEM TO BE SOLVED: To provide a diffusing and reflecting board and a screen for projector using the same with which diffused and reflected light can be limited into desired angle range, uniform luminance can be provided within a visual area, the center of the visual area can be located in the normal direction of the diffusing and reflecting board even when illuminating light is not photographed and the direction of projecting light is located at an angle different from the normal direction of the diffusing and reflecting board, and the wavelength characteristics of the diffused and reflected light can be controlled. SOLUTION: Three hologram recording films 83, 84 and 85 are successively stuck on a base film 82 and a light absorbing layer 86, protecting layer 87 and reflection reducing layer 88 are applied on these films. Cubic holograms for diffusing and reflecting red, green and blue are respectively formed on the hologram recording films 83, 84 and 85. The cubic hologram is a paraboloid inclining the shape of the interface of each layer from the vertical direction of a screen 81 for projector on its paraboloid or central axis, and such a fine put is arranged inside the plane. |
