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Visual Systems Division
Technical Bulletin
LT85 Throw Distance Data
Desktop and Ceiling Mount
Contents
Product Description, Lens Specs, Notes & Formulas
Projection Distances and Screen Sizes
Top, Front and Right Side
Bottom, Back and Left Side
Product Description
Type:
Single chip DLP
Native Resolution:
800 x 600
Brightness:
800 ANSI Lumens
Lens Specifications
Manual Focus (No Zoom)
Screen Sizes:
Throw Ratio:
Offset Angle:
§
For Screen Sizes of 36 to 200 inches not indicated on the projection tables, use the formulas below.
§
If the figures on the tables do not match the figures in the 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 screen with. (regardless of 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)
H = D x 0.8
V = D x 0.6
B = 0.5222H
C = 1.696H – 0.1344
D = 0.1472H
-1
= tan
(B / C)
projector
F3.0
f = 20.3mm
36" - 200" diagonal
1.64 - 1.69:1 (dependent on screen size and focus setting)
°
°
17.0
– 17.2
H = Screen Width (4:3)
V = Screen Height (4:3)
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and top of screen (bottom of screen for
= Throw angle
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
Dimensions: 9.4"(W) x 2.1"(H) x 7.7"(D)
Weight:
3.3 lbs
Rev. 1.6
(not incl. Protrusions)
desktop application)
Page 1
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Summary of Contents for NEC LT85
- Page 1 If the figures on the tables do not match the figures in the 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.
- Page 2 Desktop and Ceiling Mount Projection Distance and Screen Size for Desktop 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.
- Page 3 LT85 Throw Distance Data Desktop and Ceiling Mount Projection Distance and Screen Size for Ceiling Mount Installation The following diagram shows the relationship between projector position and the screen. Distances are in inches. For millimeters multiply by 25.4. Ceiling Mount Installation...
- Page 4 Visual Systems Division Technical Bulletin LT85 Throw Distance Data Desktop and Ceiling Mount Cabinet Dimensions The following diagrams show the cabinet dimensions for the MultiSync LT85/150. Dimensions are in inches. For millimeters multiply by 25.4. 9.37 1.71 ‚c‚k‚o ‚`• @‚s‚d‚w‚`‚r• @‚h‚m‚r‚s‚q‚t‚l‚d‚m‚s‚r• @‚s‚d‚b‚g‚m‚n‚k‚n‚f‚x Rev.
- Page 5 Visual Systems Division Technical Bulletin LT85 Throw Distance Data Desktop and Ceiling Mount Cabinet Dimensions (continued) The following diagrams show the cabinet dimensions for the MultiSync LT85/150. Dimensions are in inches. For millimeters multiply by 25.4. M4 (DEPTH 4mm) M4(DEPTH 5mm) 0.925 6.87...
- Page 6 #Y: Images in above flagged with # and Y are compressed with Advanced AccuBlend on LT85 only. ##Y: Images in above flagged with ## and Y are compressed with Advanced AccuBlend on LT150 and LT85 NOTE1: Some composite sync signals may not be displayed correctly.
- Page 7 X on/off: None Communications: Full duplex PC Control Connector (DIN-8P) To GND of PC NOTE: Pins 2, 3, 5, 6 and 8 are used inside the projector. Code Data To RxD of PC To TxD of PC Rev. 1.6 Page 7...
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