71R5905753 /17 DPxK-19B/23B/P
SCREEN
DMD
Lp1
Lp2
Fp1
Fp2
SCREEN
DMD
Lp3
Lp4
Fp3
Fp4
(Scheimpflug)
Image 5–22 Scheimpflug principle
Scheimpflug principle
The "plane of sharp focus" can be changed so that any plane can be brought into sharp focus.
When the DMD plane and lens plane are parallel, the plane of sharp focus will also be parallel to
these two planes. If, however, the lens plane is tilted with respect to the DMD plane, the plane of
sharp focus will also be tilted according to geometrical and optical properties. The DMD plane, the
principal lens plane and the sharp focus plane will intersect in a line below the projector for
downward lens tilt.
Scheimpflug adjustment points
Image 5–23 Scheimpflug adjustments
Indication on drawing
Function
1, 2 and 3 Scheimpflug adjustment nuts
4 Locking nut
A, B, C and D Set screws
a, b, c and d lock nuts
1, 2 and 3 are adjustment points.
4 is a locking point and NOT used during Scheimpflug adjustment.
Required tools
• Allen key 3 mm
• Nut driver 13 mm
• Nut driver 10 mm
How to adjust
1. Project a green focus pattern. For a 4K projector, use the 4K test pattern. Otherwise, use the 2K test
pattern.
Lenses & lens holder
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