NEC VT37 Installation Manual page 2

Diagrams and Distance Charts
The following diagrams show the relationship between projector position and the screen. Refer to the chart below for data.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling
Mounted
Screen Top
Lens Ctr
Screen Ctr
Desktop
Screen Ctr
Lens Ctr
Screen Bottom
Distance chart for popular 4:3 screens
Note: For screen sizes not indicated on the chart,
use the formulas on page 1.
www.necvisualsystems.com
D
B
B
D
C
Throw Distance
C
Throw Distance
2.5"
Screen Size (4:3)
B
Diag W H
inches inches inches inches
25 20 15 6.0
60 48 36 14.3
72 57.6 43.2 17.2
84 67.2 50.4 20.1
90 72 54 21.5
100 80 60 23.9
120 96 72 28.7
150 120 90 35.8
180 144 108 43.0
200 160 120 47.8
250 200 150 59.7
300 240 180 71.7
6.1"
5.5"
α
Lens Offset from
Mount Pipe
2.7"
α
α
C D
inches inches degrees
22.9 1.5 14.6
56.5 3.7 14.2
68.0 4.4 14.2
79.6 5.1 14.2
85.3 5.5 14.1
94.9 6.1 14.1
114.1 7.3 14.1
143.0 9.2 14.1
171.8 11.0 14.1
191.0 12.2 14.0
239.0 15.3 14.0
287.1 18.3 14.0
VT37/47 Page 2 of 6