SVD 800 HD
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4.3.3 Desktop rear projection
For rear projection we recommend installing the projector
with the axis of the green lens orthogonal to the screen
plane; pay attention that the green lens be centered with
respect to the screen
(see: par. 4.6, Projector Centering
page 23).
By using Fresnel lenses for rear projection, it is mandatory
to install the projector orthogonal to the centre of the
screen to achieve maximum brightness and a better per-
formance.
The distance between projector and screen is given in
the following table.
TABLE 2: DESKTOP REAR PROJECTION
C = Distance between the front panel and the screen.
C
SCREEN CENTRE
SCREEN
14
°
Fig. 44
-
If the measurement of the screen diagonal is not in
the table, C can be determined (in cm) as follows.
-
Measure the screen diagonal and take the nearest
value from the table.
-
Calculate the ratio between value C and screen width
in the table.
-
Multiply the result by the actual screen width.
Example: Suppose we have a 105” screen diagonal.
100” is the nearest value in the table.
The A/Width ratio is equal to 299/203.2=1.471
A105” screen diagonal is 213.3 wide
So, the value of A is: 1.471x213.3=313.7 cm.
Note:
For 16/9 screen formats, measure the width
and refer to the nearest width value in the table.
4.3.4 Ceiling front projection
Use the ceiling assembly kit (given with the projector) to
install the projector on the ceiling and proceed as follows:
To attach the projector to a solid concrete block ceiling or
brick ceiling drill 12mm dia. holes 65mm deep. Attach on
the ceiling the big bracket included in the package using
the four concrete anchors provided together with screws
and washers, USING the outer holes on the bracket, and
tighten to 25 Nm maximum torque.
WARNING:
The installer must verify that the wall can support four
times the full load (mounting bracket, hardware and
electronics), the minimum thickness of the wall
support has to be 10 cm.
For concrete blocks and brick walls, do not drill mounting
holes into mortar joints, the distance between anchor and
free edge of the support wall has to be more than 18 cm.
The bracket must be fixed very carefully.
SCREEN SIZE
C
USEFUL AREA 4/3
Diagonal
Width
Height
(Inches)
(cm.)
(cm.)
(cm.)
60”
121.9
91.4
188
80”
162.5
121.9
243
90”
182.9
137.2
271
100”
203.2
152.4
299
120”
243.8
182.9
355
150”
304.8
228.6
439
180”
365.7
274.3
522
200”
406.4
304.8
578
250”
508.0
381.0
718
300”
609.6
457.2
857
Fig. 45
440
550
1
15
93
180
266
WALL
Summary of Contents for SVD 800 HD
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