Projection Methods
The term projection refers to any
image or light source reflected or transmitted onto or through
a screen
material.
Before you can begin to consider what type of screen material will
be right for your application it is always good to know what type
of projection method will be used.
Static Image Projection
OVERHEAD PROJECTION
In Business and Educational settings, the overhead transparency projector
is still a very popular projection source. It is portable, and
has a high light output of approximately 2000-3000 lumens.
This is ideal for front projection applications, especially when
dealing with various locations where ambient light control may
vary greatly. Works well with all front projection Materials as well
as
Show, Studio and Opera rear projection materials.
35MM SLIDE TRANSPARENCY
One of the most popular methods of projecting single image static
frame photography. Like the overhead projector, the slide projectors
portability and relatively high lumen output (anywhere between
1000-6000 lumens), provide an excellent image with fine detail
and exceptional
color quality. Works well with all types of Front, Rear and Front/Rear
screen materials.
PANI PROJECTION/SCENIC PROJECTION
This method of static projection is used primarily in theatrical,
Opera and concert productions. This is a very large format,
non-portable projection system that displays single slides or
slide loops.
Wattages can range from 2000 watt halogen to 12,000 watt metal
halide sources.
Works well with all types of Front, Rear and Front/Rear screen
materials.
Video (Moving) Image Projection
CRT
A video projection system that uses three-tube projectors (tubes
are red, green and blue) with a fixed focal length. These types
of projectors are usually lower in light output. The alignment
of the three tubes is critical for good picture resolution
and rendition. Works well with all types of Front, Rear and
Front/Rear screen materials
LCD
This technology uses a conventional light source,(usually a
halide arc lamp), to project an image by passing light through
three
internally located liquid crystal displays, (hence the name
LCD). Each image is then combined by a series of mirrors
into a single
image. Works best when used with High Gain Front projection
Screen, Optitrans neutral Grey or Aria neutral grey rear
projection screen.
DLP
This type of projector is based on the Digital Micro mirror
Device (DMD) which uses over 50,000 microscopic mirrors on
the SVGA
chip to reflect images onto the screen. Works best when used
with High Gain Front projection Screen, Optitrans neutral
Grey or Aria neutral grey rear projection screen. |
