Christie Mirage S+14K User Manual page 18

INSTALLATION & SETUP
Screen Type '
2-12
Roadster / Mirage S+ User's Manual
Downloaded From projector-manual.com Christie Manuals
Rear Screen, Floor Mount Installation
ADVANTAGES
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Projector is completely hidden
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Projector is easily accessed
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Usually good ambient light rejection
Rear Screen, Inverted Mount (ceiling) Installation
ADVANTAGES
•
Projector is completely hidden
•
Usually good ambient light rejection
Rear Screen, Floor Mount with Mirror
ADVANTAGES
•
Projector is completely hidden
•
Usually good ambient light rejection
•
Requires less space behind screen than
other rear screen installations
Front Screen Installations
While there are two basic screen types, flat and curved, generally flat screens are
recommended for this projector (Figure 2.17)X. Flat screens offer a gain of about 1
with a viewing angle just less than 180°. Incident light reflects equally in all
directions so the audience can see the display from various angles. Because of the
low gain, flat screens are most effective when ambient lighting is reduced, although
this difference may be negligible given the high brightness output from this projector.
Figure 2.17. Audience Coverage with Flat Screen Figure 2.17
NOTE: Lenses for this projector are designed primarily for use with flat screens, but
the projector depth-of-field range allows the lens to be focused on curved screens as
well. While focus remains sharp in the corners, there may be significant pincushion
distortion, primarily at the top of the screen.
Rear Screen Installations
There are two basic types of rear screens: diffused and optical . A diffused screen has
a surface which spreads the light striking it. Purely diffused screens have a gain of
less than 1. The main advantage of the diffused screen is its wide viewing angle,
similar to that of a flat screen for front screen projection. Optical screens take light
from the projector and redirect it to increase the light intensity at the front of the
screen. This increase at the front reduces the intensity in other areas. A viewing cone,
similar to that of a curved front screen installation, is created.
CONSIDERATIONS
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Requires separate room
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Requires rear projection screen
CONSIDERATIONS
•
Requires separate room
•
Installation cost is usually higher
CONSIDERATIONS
•
Requires separate room
•
Installation cost is usually higher