User Manual

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SCREENS FOR PROFESSIONALS
SCREENS FOR PROFESSIONALS
GLOSSARY
Active 3D
Active 3D involves a single projector rapidly alternating between displaying the left eye image and the right eye image.
The frequency is coordinated with a pair of shuttered glasses which block the light to the opposite eye at the same rate.
With active 3D it isn’t necessary to use a projection surface with polarisation retention.
Ambient Light
Ambient light is the amount of unwanted light in a room that can affect the projection in a negative way. Ambient light
can come from windows or from room lighting.
ANSI-Lumen
Lumen is the unit of luminous flux, a measure of the power of light perceived by the human eye and the light output
of projectors. The unit of measure is Lumens. The standardization for this measurement has been established by the
American National Standards Institute (ANSI).
Aspect Ratio
An aspect ratio is the relationship between the width and height of an image. Common aspect ratios are Video (4:3),
HDTV (16:9), Wide (16:10), Cinemascope (2.35:1) and Square (1:1).
Barrel Distortion
Image magnification decreases with distance from the optical axis. This creates an image which has been mapped
around a sphere (or barrel) where lines do not go through the centre of an image but are bowed outwards.
Black Drop
Black Drop is the extended black border above the viewing area used to position the viewing area at a the appropriate
height.
Brightness
Brightness is an attribute of visual perception in which the projection screen reflects light.
Cancellation /
Extinction
Cancellation and Extinction refer to differentiating between one image and the other. It describes the lack of noise in
a signal, or the lack of the left eye image being seen by the right eye.
Contrast
Contrast is the difference between the brightest white and the darkest black.
Easy Serviceability
System
The motor and screen surface of the projection screen are accessible for maintenance and service without uninstalling
the screen casing.
Edge Blending
A setup with multiple projectors projecting a single source creating a single image.
Gain
Gain is a measure of reflection performance. Gain is related to a universal reference standard: Magnesium Carbonate
(MgCO3). Rather than absorbing light, MgCO3 reflects projected light back with perfect evenness.
Ghosting / Crosstalk
This describes the interference of one signal with another signal. It measures the amount of noise or the amount of
left-eye signal seen by the right-eye.
Hot Spot
A hot spot occurs when the light of the projector is centered on the projection screen creating a brighter area.
Hot spotting is the opposite of uniform projection.
IP
Internet Protocol is the most commonly used set of rules for dispatching data across a computer network.
IR: Infrared
Wireless control via Infrared wavelengths are used to operate the projection screen. The receiver has to be placed into
sight of the remote control.
Keystone Correction
Distortion created by the angle of the projected image can be corrected by tilting the angle of the projection screen.
Glossary