Folded Optics; Other Considerations - Runco LightStyle LS-HB Installation & Operation Manual

Installation

Folded Optics

Other Considerations

Vertical Lens Shift — LS-HB Ultra: The LS-HB Ultra provides up to 25% of
upward vertical lens shift and up to 35% of downward vertical lens shift. For
example, with a 100 x 56 inch (1.78:1) screen, you can shift the image up to 14.00 inches
(0.36 meters) above or 19.60 inches (0.50 meters) below the screen center.
1. With no vertical lens shift, the lens center and screen center are
Note
2. Vertical shift limits are percentages of the screen height.
3. Vertical lens shift figures are for ceiling mount
In rear-screen applications where space behind the projector is limited, a mirror may be
used to fold the optical path, as shown in Figure 3-5. The position of the projector and
mirror must be accurately set. If you are considering this type of installation, contact your
dealer for assistance.
Screen
Figure 3-5. Folded Optics
For best performance, always use "first-surface" mirrors in your
Tip
rear-projection installation (as opposed to conventional,
"second-surface" mirrors with the reflective surface behind a transparent
substrate such as glass or acrylic).
First-surface mirrors provide a strict reflection without the "ghosting"
effect seen with a second surface mirror, where a faint secondary
reflection could be observed coming from the front surface of the glass.
Other considerations and tips that can help improve your installation:
• Keep the ambient temperature constant and below 35°C (95°F). Keep the projector
away from heating and/or air conditioning vents. Changes in temperature may cause
drifts in the projector circuitry, which may affect performance.
• Keep the projector away from devices that radiate electromagnetic energy such as
motors and transformers. Common sources of these include slide projectors,
speakers, power amplifiers and elevators.
aligned with each other.
configurations. For floor installations (where the projector is
upright), reverse the up/down vertical lens shift percentages.
Mirror
20 Runco LS-HB/LS-HB Ultra Installation/Operation Manual