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4.
Projector
Throw Distance
and Mounting
Throw Distance
Mounting
5.
Projection Lens
Focus
In any projector setup the goal is to get the brightest, sharpest image possible on
screen. One of the first ways to achieve this is to position the projector at the right
distance from the screen by calculating throw distance and then aligning it so that it
is perpendicular and the lens is centered to the screen.
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Throw distance (also known as projection distance) is the distance measured from
your projector's front surface to the screen. This is an important calculation in any
projector installation as it determines whether or not you have enough room to install
your projector with a desired screen size and if your image will be of the right size
for your screen.
The way in which you calculate throw distance for any RPMSP model directly
depends on its configuration. For projectors in a lens horizontal configuration, you
can quickly estimate throw distance by taking the horizontal width of the screen and
multiplying it by the lens throw ratio. The result of this calculation tells you roughly
how far back the projector should be positioned from the screen in order to project a
focused image large enough to fill the screen. However, it is very important to
always calculate the precise throw distance for the lens type and screen size you're
going to use.
In lens vertical configurations, where a first surface mirror is used to shorten the
distance between the projector and screen by folding the optical path, throw distance
is a little more difficult to calculate, as there are many variables to consider.
Refer to the drawings provided for your specific projector model at the end of this
guide for projector dimensions and other technical information.
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There are four mounting points to each projector. Using the appropriate hardware,
mount the projector to a flat, sturdy surface. It is strongly recommended you use a
level when mounting to ensure the projector remains level. In some cases, you will
need to adjust the 6-axis adjuster to raise the Projection Head Module (PHM) to
center or position the lens correctly. After each adjustment, always check the
projector is level so as not to introduce unnecessary linearity issues. TIP: If you need
to raise the PHM by more than 0.5", use the coarse adjustment feet of the adjuster to
do so.
Refer to the drawings provided for your specific projector model at the end of this
guide for mounting hole location and other technical information.
When the projector is first powered up, you can adjust the projection lens to focus
and correct any image geometry and lateral color issues that may exist. This is a good
first step to setting up your display.
To adjust focus, do the following:
1. Unlock the focus lock ring (A) – turn counter-clockwise.
2. Simultaneously turn both field curvature rings (B & C) in either direction until
you reach the desired focus.
3. Turn the focus lock ring (A) in the clockwise direction to lock adjustments.
RPMSP Series Installation Guide
9
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