www.necvisualsystems.com
VT37/47
Page 1 of 6
NEC
Solutions
(America),
Inc.
Visual Systems Division
VT37/47 Installation Guide
Ceiling
Mounted
and
Desktop
v1.5
Contents
Product Description, Lens Specs, Notes and Formulas
Pg. 1
Diagrams
and
Distance
Charts
Pg. 2
Cabinet
Dimensions
Pg. 3 - 4
Ceiling
Mount
Dimensions Pg. 5
Input
Panel
and
Control
Codes
Pg. 6
Product Description
Type:
3
panel
LCD
projector, Brightness: 1500
ANSI
lumens
0.7” p-Si TFT
Dimensions: 11.57”(W) x 4.43”(H) x 11.10”(D)
Resolution:
800x600
Weight:
6.4 lbs
Lens Specifications
Throw
Ratio:
1.2:1(for
100”
diagonal)
Focal
Length:
17.5mm
Offset Angle: 14.1
°
(for
100”
diagonal)
F/#: 2.0
Screen Sizes: 25”-300” diagonal (4:3)
Fixed Throw / Manual Focus
Notes
For screen sizes not indicated on the projection charts, use the formulas below.
If a value in a chart does not match the results of the formulas, use the values in the chart.
The ceiling must be strong enough to support the projector and the installation must be in accordance with any local
building codes.
All formulas are based on a 4:3 aspect ratio and screen.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary
±
5%.
Formulas
The Projection Formulas use the image width for calculation. Image width is the same for all aspect ratios, only vertical image size
varies. For proper projector placement, determine the image width for a desired screen size. Use the Screen Formulas below to
calculate all screen dimensions. Plug in the image width for “W” in the Projection Formulas.
Refer to the diagrams and charts for popular screen sizes on page 2.
Definitions:
4:3 Screen Formulas:
W
=
Image
Width
W
= H x 4/3
H
=
Image
Height
(Size)
H
= W x 3/4
B
= Vertical distance between lens center and screen center
Screen Diagonal
= W x 5/4
C
= Throw distance
D
= Vertical distance between lens center and screen top (screen
bottom for desktop)
α
= Projection angle
Projection Formulas:
B
=
0.2986W
C
=
1.2008W
–
1.142
D
= 0.0764W
α
= tan
-1
(B/C)
