P3D lenticules

["bob porter" <bporter3d@xxxxxxxxxxx>]

They're called "lenticular screens", and the "lines" are lenticules.  A
silver screen is a specular reflector, like a mirror (angle of incidence
equals angle reflection).  Since the projector is typically centered on
(normal to) the screen, that means the image brightness of a flat silver
screen will fall off rapidly as you move off-axis.  The lenticules are
there to provide a surface to reflect some image off to the sides, to
help boost off-axis brightness.


Does anyone know the LPI (lines per inch) of these lenticules? Or what angle 
of view they represent?

Bob Porter

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