NEC VT491 VT491/590/595 IG - Page 1

NEC VT491 - SVGA LCD Projector Manual

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VT491/590/595 Installation Guide Ceiling Mounted and Desktop Contents Product Description, Lens Specs, Notes and Formulas Diagrams & Distance Charts Cabinet Dimensions Ceiling Mount Dimensions Input Panel and Control Codes Pg 1 Pg 2 Pg 3-4 Pg 5 Pg 6 NEC Display Solutions of America, Inc. Rev 1.3 Product Description Type: 3 panel LCD projector, 0.6" p-Si TFT w/MLA Resolution: VT491: 800 x 600 VT590/VT595: 1024x768 Dimensions: 12.1" (W) x 4.4" (H) x 10.2" (D) Power Consumption: 255W (max) Lens Specifications Throw Ratio: 1.5 - 1.8:1 (for 100" diagonal) Offset Angle: 8.3° - 10.0° (for 100" diagonal) Screen Sizes: 25" - 300" diagonal (4:3) Brightness: VT491: VT590/VT595: 2000 ANSI Lumens 2000 ANSI Lumens Fan Noise: Weight: BTU's: 34 dB / 29dB @ 1 meter 6.17 lbs 870 BTU/hour Focal Length: 18.9mm - 22.7mm F/#: 1.7 - 2.07 Manual Focus/Manual Zoom Notes ƒ For screen sizes not indicated on the projection tables, use the formulas below. If the figures on the tables do not match the results of formulas, use the figures in the table. • All calculations are based on 4:3 aspect ratio. • Distances are in inches, for millimeters multiply by 25.4. • Distances may vary ±5%. Formulas The Projection Formulas use the image width for calculation. For proper projection placement, determine the image width for the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the width for "W" in the Projection Formulas. Refer to the diagrams and charts for popular screen sizes on page 2: Definitions: W = Image Width H = Image Height (size) B = Vertical distance between lens center and screen center C = Throw distance D = Vertical distance between lens center and screen top (screen bottom for desktop application) 4:3 Screen Formulas: W = H x 4/3 H = W x 3/4 Screen Diagonal = W x 5/4 Projection Formulas: B = 0.266W C (wide) = 1.525W - 1.176 C (tele) = 1.828W - 1.173 D = 0.108W α (wide) = tan¯¹ (B/C(wide)) α (tele) = tan¯¹ (B/C(tele)) www.necdisplay.com VT491/590/595 Page 1 of 6

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NEC Display Solutions of America, Inc.
VT491/590/595 Installation Guide
Ceiling Mounted and Desktop
Rev 1.3
www.necdisplay.com
VT491/590/595
Page 1 of 6
Contents
Product Description, Lens Specs, Notes and Formulas
Pg 1
Diagrams & 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:
VT491:
2000 ANSI Lumens
0.6” p-Si TFT w/MLA
VT590/VT595:
2000 ANSI Lumens
Resolution:
VT491:
800 x 600
VT590/VT595:
1024x768
Fan Noise:
34 dB / 29dB @ 1 meter
Dimensions:
12.1” (W) x 4.4” (H) x 10.2” (D)
Weight:
6.17 lbs
Power Consumption: 255W (max)
BTU’s:
870 BTU/hour
Lens Specifications
Throw Ratio:
1.5 – 1.8:1 (for 100” diagonal)
Focal Length:
18.9mm – 22.7mm
Offset Angle:
8.3° - 10.0° (for 100” diagonal)
F/#:
1.7 - 2.07
Screen Sizes:
25” - 300” diagonal (4:3)
Manual Focus/Manual Zoom
Notes
±
For screen sizes not indicated on the projection tables, use the formulas below.
If the figures on the tables do not match the results of formulas, use the figures in the table.
•
All calculations are based on 4:3 aspect ratio.
•
Distances are in inches, for millimeters multiply by 25.4.
•
Distances may vary
±
5%.
Formulas
The Projection Formulas use the image width for calculation. For proper projection placement, determine the image width
for the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the 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 application)
Projection Formulas:
B
= 0.266W
C
(wide) = 1.525W – 1.176
C
(tele)
= 1.828W – 1.173
D
= 0.108W
α
(wide) = tan¯¹ (B/C(wide))
α
(tele) = tan¯¹ (B/C(tele))