User Manual

16
SCREENS FOR PROFESSIONALS
SCREENS FOR PROFESSIONALS
The importance of the projection surface
The projection screen is an indispensable part of any presentation or home entertainment installation. Because,
regardless of how good the projector itself may be, the image always needs to be projected onto a surface that
allows multiple viewers to see the graphics and comfortably read the text. While the technical engineering of a
good projection screen partly focuses on operation and installation, the projection screen surface is by far the
most important element. The choice of screen surface type determines the screen’s ability to handle the
projected images.
Diffusion
A diffusion projection screen surface spreads the light evenly and has a wide viewing angle. Rather than reflecting the
light as a beam, the diffusion projection screen surface disperses the light evenly and always achieves a gain of close to
the norm value of 1.0. The projector may be ceiling mounted or placed on a table.
Reflective
A reflective projection screen surface reflects the projected light from a ceiling-mounted projector in a beam in the
direction of the viewer. The angle of incidence is the same as the angle of reflection. Because of the beam effect, the
viewing angle reduces but the gain increases.
Retro-Reflective
A retro-reflective projection screen surface reflects the projected light from a table supported projector in a beam in the
direction of the viewer. The light is reflected back in the direction from which it originates. Because of the beam effect,
the viewing angle reduces but the gain increases.
Diffusion Transmissive (rear projection)
In the case of a transmissive projection screen surface, the image is projected from behind the surface and is
transmitted by diffusion to the audience side. The projector may be either mounted from the ceiling or placed on
a table.
Types of projection surfaces
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projector performance (output) and the placement of the projector. These variables need to be tuned to
each other in order to create an optimum display.
PROJECTA ACADEMY
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