47
Projection Distance and
Lens Shift Range
The projection distance refers to the distance between the
front of the lens and the projected surface.
The lens shift range represents the distance in percent (%)
by which the lens can be shifted from the center of the
projected image. The lens shift range is regarded as 0%
when the point
A
in the illustration (point where a line
drawn from the center of the lens and the projected image
cross at right angles) is aligned with the center of the
projected image and full width or full height of the
projected image is regarded as 100%.
VS +:Vertical lens shift range (up) [%]
VS –:Vertical lens shift range (down) [%]
HS +:Horizontal lens shift range (right) [%]
HS –:Horizontal lens shift range (left) [%]
Projection distance L
Projected image
Front of the lens
Lens shift range
Projected image
Center of the lens
50%
50%
Center of the
projected image
Side of the unit
A
Lens shift range
Projected image
Center of the lens
50%
50%
Center of the
projected image
Top of the unit
A
Center of the lens
Projected image
VS +
VS –
HS –
HS +
Shaded region: Lens shift range
