NEC WT600 White Paper page 2

avoided by mounting the screen with the diffusion side toward the projector and the shiny side toward the viewer. This
look has much the same luster as a direct view TV. If a more matt surface is desired, screen manufacturers offer
screens with AR (anti-glare) coatings on the viewer side.
A screen that will give the best results should be a 'diffusion type' and it should be installed so that the diffusion side is
facing the projector (not the viewer) to minimize the possibility of secondary reflection. Screens with a fresnel or 'etched'
rear surface cannot be used since they require a projector with a zero degree offset lens. The WT600 does not have a
lens, and as stated earlier, the image is projected at a very steep angle (55°).
A diffusion screen with a low gain of approximately 1.0 should be used. A low gain will help to 'capture' the image within
the depth of the screen material and not allow much light to pass through and be lost over the viewer's head, as well as
reduce the amount of hot spotting.
The system will not be as bright as when used with some brighter traditional projectors, and there may be some
minimal hot spotting at the bottom of the screen. However the pros should far outweigh the cons for many users who
need minimal depth in an RP system.
It is also very important that the integrator work with a screen manufacturer who has the expertise in designing an RP
system that will give optimum performance when a WT600 is used within the system.
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