Abstract: A polarizing screen for visually presenting a picture in response to receipt of projected imagewise rays of light having a polarizing fabric overlaying a first surface of the screen base facing a viewer and operable to pass therethrough the projected imagewise rays of light having the first polarizing direction, but absorb rays of light having a second polarizing direction. The polarizing fabric includes a plurality of juxtaposed polarizing fibers and a plurality of juxtaposed non-polarizing fibers interlaced with the juxtaposed polarizing fibers so as to extend perpendicular to said juxtaposed polarizing fibers. Instead of the polarizing fabric, a non-woven sheet having the polarizing fibers juxtaposed thereon may be used.

Abstract: A phase-type focusing screen includes is made by using two photo masks each having a plurality of unit pattern regions regularly arrayed, each of which has a plurality of minute patterns of a predetermined shape and different size irregularly arrayed in such a way that three or more plane portions of different height are formed in the surface of a substrate, wherein the light beams passing through the combined minute patterns are given phase differences as they are diffracted or scattered. Thus, a desired diffusing characteristic is imparted into the focusing screen.

Abstract: A focusing screen has a base plate with a planar surface. A plurality of unit regions are arrayed with a periodicity on the base plate planar surface. Each of the unit regions comprises (1) a first plurality of convex portions or concave portions having planar surfaces substantially parallel to the base plate planar surface and having a first height different from the base plate planar surface and having at least two different diameters, and (2) a second plurality of convex portions or concave portions having planar surfaces substantially parallel to the base plate planar surface and having a second height different from the base plate planar surface and having at least two different diameters.