Visual Systems Division
Technical Bulletin
LT85 Throw Distance Data
Desktop and Ceiling Mount
Rev. 1.6
Page 2
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.
Desktop Setup
α
C
B
D
Lens Ctr
Screen Bottom
Screen Ctr
Throw Distance
1.5"
Distance Chart
Note:
For screen sizes of 36 to 200 inches not indicated on the projection tables, use the formulas on page 1.
Screen Size
B
C
D
α
Diagonal
Width (H)
Height (E)
40"
32"
24"
16.7"
54.7"
4.7"
17.0°
60"
48"
36"
25.1"
81.9"
7.1"
17.0°
67"
53.6"
40.2"
28.0"
90.8"
7.9"
17.1°
72"
57.6"
43.2"
30.1"
97.6"
8.5"
17.1°
84"
67.2"
50.4"
35.1"
113.8"
9.9"
17.1°
90"
72"
54"
37.6"
122.0"
10.6"
17.1°
100"
80"
60"
41.8"
135.8"
11.8"
17.1°
120"
96"
72"
50.2"
162.6"
14.2"
17.1°
150"
120"
90"
62.8"
203.5"
17.8"
17.1°
180"
144"
108"
75.3"
244.1"
21.3"
17.1°
