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GLOSSARY
Operation Level ➤
Optical Screen ➤
PAL Video ➤
Pincushion ➤
Pixel (Picture ➤
Element)
Projector-to- ➤
Screen Distance
Protocol ➤
Rear Screen ➤
Recall Memory ➤
Resolution of ➤
the CRT
Resolution of ➤
the Lens
A.6
The projector is at operation level when an image is (or may be) displayed
and no control, dialog, error, or help messages are displayed. For example, if
a help page is displayed, the projector is not at operation level.
A type of rear-projection screen which re-directs light through the screen
to increase image brightness in front of the screen. Screen gain is usually
greater than 1 but audience viewing angles are reduced.
A video output format of some video tape and disk players (used primarily in
Europe, China and some South American and African countries). All PAL
(Phase Alternating Line) video is a 50 Hz standard with 768 x 576 resolution.
A distortion of the image which occurs when the borders are concave
or convex.
The smallest discernable element of a computer generated image.
Also called "Throw Distance", the distance between the front of the
projector's green lens and the screen.
The type of code format utilized by IR keypad(s). The standard code is
Protocol A. By using two different protocols, two projectors may be used side
by side while being controlled independently by their remote IR keypads.
A translucent panel for screen projection. Incident light travels through the
incident surface of a rear screen and forms an image on the other surface.
A setup memory which is not associated with any particular input.
The maximum number of lines that can be distinguished on the face of
a CRT.
The maximum number of alternate white and black horizontal lines that
can be distinguished on a screen when a photographic target is placed
between the lens and a light source, and illuminated by that light source.
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