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Perfect rendition of natural colors
Reproducing bottomless whites, spectacular reds
— Pure xenon lamp
Reproducing the brightness of clear whites and reds was a
difficult matter for projectors because of the UHP lamp
system (ultra high pressure mercury lamp), a standard light
source built into conventional LCD projectors. Each RGB
brightness level that a UHP lamp provides is different, as
indicated by the gray line on the following diagram. The red (R)
level is very much lower than that of green (G) and blue (B),
thus failing to produce a clear red that in turn affects various
other colors.
The pure xenon lamp system, utilized by this projector in
place of the UHP lamp, gives a light beam very similar to
sunlight. Because of its flat spectral characteristics, the beam
is used for critical applications that need accurate color
reproduction, such as solar simulators, fiberscopes, etc. The
most common application of the pure xenon lamp system is
in the cinematographs of movie theaters.
Pure xenon lamp
Spectral characteristics of a pure xenon lamp,
sunlight, and a UHP lamp
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Wave length (nm)
UHP lamp
Sunlight
Pure xenon lamp
400
450
500
550
600
650
700
As shown in the diagram below, this
projector incorporates a design that keeps
the physical distance between the lamp and
each panel of red (R), green (G) and blue (B)
equal, which makes it very effective at
reproducing pictures evenly colored to the
four corners of the screen.
Highly-uniform color reproduction
over the entire screen
— Isometric illumination system
In previous projectors, one of the physical
distances between the lamp and each panel
of red (R), green (G) and blue (B) had to differ
from the other two, which caused color
heterogeneity. This color heterogeneity was
electrically and optically compensated for,
but not completely eliminated.
The beauty of real black
— Cinema Black Pro
Truly accurate black color reproduction is
necessary for a movie to be considered
visually beautiful. In addition to the existing
electric power regulation of the lamp, this
projector achieves this black color by utilizing
an optical iris that has an electric diaphragm
on the lighting path.
By controlling the iris (which decreases the
light intensity and makes a thinner beam) the
contrast is emphasized and the black level is
enhanced. Furthermore, this feature enables
the adjustment of the light volume, ensuring
the optimum brightness for the screen size,
not only for a large screen that uses high
volume, but also for a small screen.
Optical iris
High light volume
Low contrast
Low light volume
High contrast
When the optical iris
increases the light intensity
When the optical iris
decreases the light intensity
Diagram of the isometric illumination system
Lamp
Lamp
Red (R) SXRD
Blue (B) SXRD
Green (G)
SXRD
Lamp
Projection lens
Red (R) lighting path
Green (G) lighting path
Blue (B) lighting path
Equal distance
Overview
