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ET-D3LEF70
Note
f This illustration is prepared on the assumption that the projected image size and position have been aligned to fit full in the screen.
f This illustration is not in accurate scale.
f The lens optical axis is the symmetrical axis passing through the center of the optical image system. This does not match with the image
center position at the home position. The home position is an origin position of the lens shift (vertical position and horizontal position of the
lens) based on the calibration result.
f As the front end of the projection lens approaches closer to the center point of the spherical screen and center axis of the cylindrical screen,
the focus and brightness uniformity of the whole projected image is enhanced.
L
L1
θ
D
Supported range of projection
distance (L)
Lens protrusion dimension (L1)
Formula for exit pupil position
(D)
*1
*1 Unit for the value to assign the θ is °. Values obtained by the formula (m) contain a slight error.
Projection angle of view (θ) (Unit: °)
10
20
30
40
50
60
70
80
91.6
Note
f For the adjustment range of the projected image position with the lens shift, refer to "Lens shift range" (x page 92).
44 - ENGLISH
Chapter 2 Getting Started — Setting up
D
L1
Projection distance (distance from the front end of the projection lens to the screen surface)
Lens protrusion dimension (distance from the front surface of the projector to the front end of the projection
lens)
Projection angle of view (angle from the lens optical axis)
Exit pupil position
= -10
Value of exit pupil position (D) (approximate value) (Unit: m)
L
Lens optical axis
θ
2 to ∞
0.386
x θ
- 3 x 10
x θ
- 1.73 x 10
-8
3
-7
2
0.0232
0.0229
0.0224
0.0216
0.0206
0.0191
0.0173
0.0150
0.0116
Screen
x θ + 0.02342
-5
(Unit: m)
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