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