Barco AutoAlign Brochure - page 10
Dedicated problems call for
The requirements for large field-of-view, high-resolution
displays are diverse. Simulation applications may require a
number of different system configurations such as front or rear
projection; different screen shapes from spherical to cylindrical,
to conic, to flat. Screen sizes may range from 3’ x 3’ (1 x 1m)
to 9’ x 60’ (3 x 20m) flat to a 90’ (30m) diameter
hemispherical dome. Users may require high brightness, high
contrast or both. The system may be single user or for multiple
simultaneous users.
On single-channel systems, projected images appear very good
and design compromises are virtually unnoticeable to even the
trained observer. In multi-channel applications the most casual
observer will notice when the image channels do not align, the
brightness across channels is different and the colors do not
match. Geometric distortions in large multi-channel displays
can be casued by projector misalignment, imperfect lenses and
folding mirrors and those from displays themselves. The
uncorrected images will have luminance and color variations
both between and within each projector channel.
Dedicated solutions
Blending with non-optimized projectors:
The first step in designing a solution for multi-channel applications
is to select projectors with the appropriate features and
optimizations. Since no single projector technology is the
best in all circumstances, Barco offers all the major projec-
tion technologies available – CRT, LCD, DLP™, and LCoS –
each optimized with a broad range of Barco features to fit
specific application needs.
Color uniformity
Complete uniformity of color
and color through out and
between all screens is very
crucial to the image quality.
To eliminate channel-to-
channel color variations,
Barco has integrated
DynaColor™ and Linked
DynaColor™ for its LCD,
DLP™, and LCoS projectors,
in addition to chromatically
matching optical
components.
Brightness uniformity
The brightness has to be consistant throughout the entire
image area and constant over time. Barco light valve projectors
attain and maintain brightness uniformity with Constant Light
Output (CLO) and Linked CLO.
Brightness differences
Geometry errors
Color differences
Imperfect blend