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Visual Systems |
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LT154/155/156 Installation Data |
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Desktop and Ceiling Mount |
Rev. 1.8 |
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Contents |
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Product Description, Lens Specs, Notes and Formulas |
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Page 1 |
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Projection Distances and Screen Sizes |
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Ceiling Mount Installation |
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Page 2 |
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Desktop Setup |
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Page 3 |
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Cabinet Dimensions |
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Top, Front and Left Side |
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Page 4 |
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Bottom, Back and Right Side |
Page 5 |
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Ceiling Mount Dimensions |
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Top, Front and Left Side |
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Page 6 |
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Bottom, Back and Right Side |
Page 7 |
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PC Control Codes |
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Page 8 |
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Product Description |
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Type: |
LT154: 3 panel, 0.9” p-Si non-MLA LCD projector |
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LT155: |
3 panel, 0.9” p-Si w/MLA LCD projector |
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LT156: |
3 panel, 0.9” p-Si w/MLA LCD projector, w/DVI Input |
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Brightness: |
LT154: |
900 |
ANSI Lumens |
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LT155/156: |
1200 |
ANSI Lumens |
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Native Resolution: |
1024 x 768 |
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Dimensions: |
8.2”(W) x 11.1”(D) x 2.8”(H) |
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Weight: |
4.9 lbs |
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Lens Specifications
Throw Ratio: |
1.9-2.0:1(Wide) / 2.2-2.3:1(Tele) |
Focal Length: |
36.5 – 42mm |
Offset Angle: |
9.0° (Wide) / 7.5° (Tele) |
F/#: |
2.0 – 2.3 |
Screen Sizes: |
25” – 300” Diagonal |
Focus Adjustment: |
Manual Focus / Manual Zoom |
Notes
For Screen Sizes of 25 to 300 inches 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.
The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local building codes.
•All calculations are based on 4:3 aspect ratio.
•Distances are in inches, for millimeters multiply by 25.4.
•Distances may vary ±5%.
Formulas
Units: Inches (for millimeters multiply final number by 25.4)
D = Screen Diagonal (4:3) |
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H = D x 0.8 |
H = Screen Width (4:3) |
V = D x 0.6 |
V = Screen Height (4:3) |
M 1.38889H |
M = Projection magnification |
B = 0.2165M |
B = Vertical distance between lens center and screen center |
C (Wide) = 1.4483M – 2.165 |
C = Throw distance |
C (Tele) = C (Wide) x 1.15 |
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D = 0.0535M |
D = Vertical distance between lens center and top of screen (bottom of screen |
α (wide) = tan-1 (B/C(wide)) |
for desktop application) |
α = Throw angle |
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α (tele) = tan-1 (B/C(tele)) |
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Page 1 |
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Visual Systems |
LT154/155/156 Installation Data |
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Desktop and Ceiling Mount |
Rev. 1.8 |
Projection Distance and Screen Size for Ceiling Mount
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mount Installation
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5.7" |
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Screen Top |
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4.2" |
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D |
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C |
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Lens Ctr |
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Throw Distance |
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α |
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B |
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Screen Ctr |
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Lens Offset from |
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Mounting Pipe |
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1.6" |
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Distance Chart |
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Screen Size |
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B |
C |
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D |
α |
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Diagonal |
Width |
Height |
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wide - tele |
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wide - tele |
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40" |
32" |
24" |
10" |
62" - 72" |
2" |
8.8° - 7.7° |
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60" |
48" |
36" |
14" |
94" - 109" |
4" |
8.7° - 7.6° |
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67" |
53.6" |
40.2" |
16" |
106" - 122" |
4" |
8.6° - 7.6° |
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72" |
57.6" |
43.2" |
17" |
114" - 131" |
4" |
8.6° - 7.5° |
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84" |
67.2" |
50.4" |
20" |
133" - 153" |
5" |
8.6° - 7.5° |
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90" |
72" |
54" |
22" |
143" - 164" |
5" |
8.6° - 7.5° |
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100" |
80" |
60" |
24" |
159" - 183" |
6" |
8.6° - 7.5° |
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120" |
96" |
72" |
29" |
191" - 220" |
7" |
8.6° - 7.5° |
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150" |
120" |
90" |
36" |
239" - 275" |
9" |
8.6° - 7.5° |
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180" |
144" |
108" |
43" |
288" - 331" |
11" |
8.6° - 7.5° |
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210" |
168" |
126" |
51" |
336" - 386" |
12" |
8.6° - 7.5° |
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240" |
192" |
144" |
58" |
384" - 442" |
14" |
8.6° - 7.4° |
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270" |
216" |
162" |
65" |
432" - |
---- |
16" |
8.5° - |
--- |
300" |
240" |
180" |
72" |
481" - |
---- |
18" |
8.5° - |
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Note:
For screen sizes of 25 to 300 inches not indicated on the projection tables, use the formulas on page 1.
Page 2
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Visual Systems |
LT154/155/156 Installation Data |
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Desktop and Ceiling Mount |
Rev. 1.8 |
Projection Distance and Screen Size for Desktop
The following diagram shows the relationship between projector position and the screen.
Distances are in inches. For millimeters multiply by 25.4.
Desktop Setup
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C |
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Screen Ctr |
Throw Distance |
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B |
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Lens Ctr |
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α |
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D |
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Projector Foot |
Screen Bottom |
1.6" |
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Distance Chart
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Screen Size |
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B |
C |
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D |
α |
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Diagonal |
Width |
Height |
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wide - tele |
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wide - tele |
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40" |
32" |
24" |
10" |
62" - 72" |
2" |
8.8° - 7.7° |
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60" |
48" |
36" |
14" |
94" - 109" |
4" |
8.7° - 7.6° |
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67" |
53.6" |
40.2" |
16" |
106" - 122" |
4" |
8.6° - 7.6° |
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72" |
57.6" |
43.2" |
17" |
114" - 131" |
4" |
8.6° - 7.5° |
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84" |
67.2" |
50.4" |
20" |
133" - 153" |
5" |
8.6° - 7.5° |
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90" |
72" |
54" |
22" |
143" - 164" |
5" |
8.6° - 7.5° |
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100" |
80" |
60" |
24" |
159" - 183" |
6" |
8.6° - 7.5° |
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120" |
96" |
72" |
29" |
191" - 220" |
7" |
8.6° - 7.5° |
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150" |
120" |
90" |
36" |
239" - 275" |
9" |
8.6° - 7.5° |
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180" |
144" |
108" |
43" |
288" - 331" |
11" |
8.6° - 7.5° |
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210" |
168" |
126" |
51" |
336" - 386" |
12" |
8.6° - 7.5° |
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240" |
192" |
144" |
58" |
384" - 442" |
14" |
8.6° - 7.4° |
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270" |
216" |
162" |
65" |
432" - |
---- |
16" |
8.5° - |
--- |
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300" |
240" |
180" |
72" |
481" - |
---- |
18" |
8.5° - |
--- |
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Note:
For screen sizes of 25 to 300 inches not indicated on the projection tables, use the formulas on page 1.
Page 3
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