JVC DLA-G20 Sales Manual page 13

Stacking systems
The basic setup for a horizontal stack configuration is shown below.
Leave a space of more than 340 mm
Horizontal stacking (DLA-M4000 x 2)
D-ILA-M4000 1:1 lens throw distance table
Screen size (4:3) Width
80 1626
90 1829
100 2032
110 2235
120 2438
130 2642
140 2845
150 3048
160 3751
170 3454
180 3657
190 3861
200 4064
Important:
Depending on the screen characteristics, different viewing angles can produce variations in illumination and color tone.
Be sure to take this into consideration when selecting the screen. Consult your JVC dealer for more information
regarding screen selection. The type of screen you use is especially important if you are using rear projection.
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Screen upper edge
Screen lower edge
Lens top point
Height
1219 1540.1
1372 1747.47
1524 1954.85
1676 2162.23
1829 2369.6
1981 2576.97
2134 2784.34
2286 2991.71
3199.08
2438
2591 3406.44
2743 3613.81
2896 3821.17
3048 4028.54
2. DLA-M15 stacking system
If you need a compact, high-intensity projection system,
you can stack two DLA-M15s in a vertical configuration.
When two DLA-M15s are stacked on a dedicated
stacking platform and the two projection images are
superimposed with the manual lens shift function, doubled
brightness can be obtained. Available dedicated stacking
platforms include a ceiling type and floor type.
Note:
As the two projection images are superimposed,
registration differences appear in the center and peripheral
areas of the screen due to the lens distortion. Use the
center portion of the optical lens to minimize the
registration difference. This difference cannot be
eliminated because it is caused by lens distortion. The
smaller the lens magnification, the less the distortion.
D-ILA-M15 stack shift table
Screen size Throw
Width Height
(306.6/H)*100
(4:3) distance
80 1626 1219 2368 25.15
85 1727 1295 2520 23.67
90 1829 1372 2672 22.34
95 1931 1449 2825 21.16
100 2032 1524 2976 20.12
105 2134 1600 3129 19.16
110 2235 1676 3281 18.29
115 2337 1753 3433 17.49
120 2438 1829 3585 16.76
125 2540 1905 3738 16.09
230 2642 1981 3890 15.48
2743 2057 4042 14.90
135
4194 14.37
140 2845 2134
13.87
145 2946 2210 4347
150 3048 2286 4499 13.41
155 3150 2362 13.00
160 3751 2438 12.57
165 3353 2515 12.20
170 3454 2591 11.83
175 3556 2667 11.50
180 3657 2743 11.18
185 3759 2819 10.88
190 3861 2896 10.59
195 3962 2972 10.32
20 4064 3048 10.06
250 5080 3810 8.05
300 6096 4572 6.71
350 7112 5334 5.75
8128 6096 5.03
400
6858 4.47
450 9144
Note:
This table is based on the assumption that two DLA-M15s are stacked on a stacking table.
When the offset axis of unit A is X% and that of unit B is Y%, X is obtained with Y = 50 to 55 in the formula
Y X = 306.6/H x 100 (provided that the offset axis of the DLA-M15 is 30 to 55%).
D-ILA Method Present Condition and Subject
Stacking systems
Screen upper edge
Stacking by suspending
from the ceiling (DLA-M15 x 2)
Screen lower edge
Stacking on the floor (DLA-M15 x 2)
Vertical stacking limit range:
The DLA-M4000s can be stacked within the area from the screen
upper edge to the lower edge.
X
Y=50 Y=51 Y=52 Y=53 Y=54 Y=55
29.85
24.85 25.85 26.85 27.85 28.85
26.33 27.33 28.33 29.33 30.33 31.33
27.66 28.66 29.66 30.66 31.66 32.66
28.84 29.84 30.84 31.84 32.84 33.84
29.88 30.88 31.88 32.88 33.88 34.88
30.84 31.84 32.84 33.84 34.84 35.84
31.71 32.71 33.71 34.71 35.71 36.71
32.51 33.51 34.51 35.51 36.51 37.51
33.24 34.24 35.24 36.24 37.24 38.24
33.91 34.91 35.91 36.91 37.91 38.91
34.52 35.52 36.52 37.52 38.52 39.52
35.01 36.10 37.10 38.10 39.10 40.10
35.63 36.63 37.63 38.63 39.63 40.63
36.13 37.13 38.13 39.13 40.13 41.13
37.59 38.59 39.59 40.59 41.59
36.59
39.00 40.00 41.00 42.00
37 38.00
40.43 41.43 42.43
37.43 38.43 39.43
41.80
37.8 38.8 39.80 40.80
38.17 39.17 40.17 41.17 42.17 43.17
38.5 39.50 40.50 41.50 42.50
38.82 39.82 40.82 41.82 42.82 43.82
39.12 40.12 41.12 42.12 43.12 44.12
39.41 40.41 41.41 42.41 43.41 44.41
39.68 40.68 41.68 42.68 43.68 44.68
39.94 40.94 41.94 42.94 43.94 44.94
41.95 42.95 43.95 44.95 45.95 46.95
43.29 44.29 45.29 46.29 47.29 48.26
44.25 45.25 46.25 47.25 48.25 49.25
44.97 45.97 46.97 47.97 48.97 49.97
46.53 47.53 48.53 49.53 50.53 51.53
42.8
43.5
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