Setup Procedures; Adjust Lens Focus; Calculate Throw Distance And Position - Christie Mirage WQ-L User Manual

Setup Procedures

Adjust Lens Focus

Failure to properly adjust lens focus results in an image that is not uniformly focused and
contains geometric distortion.
This section describes best practices for lens focus adjustment of the 0.68:1 WQXGA lens 
(P/N: 125-103105-xx), the 0.80:1 WQXGA lens (PN: 125-105107-xx), and the 1.28 - 1.71:1
WQXGA lens (P/N: 125-101103-xx).
1. Loosen the locking screw and the focusing screw.
2. Adjust the focusing screw for best focus in the image center.
3. 0.68:1 Lens Only: Loosen the field curvature locking screw and adjust the field curvature
focusing ring to sharpen the image corners.
4. Adjust the focus screw for best overall screen focus.
5. Although it is not necessary, you may want to retighten the main locking screw. Use a
maximum of 4 in.-lbs (0.45 Nm) to tighten.
Locking screw
Field curvature
focusing ring

Calculate Throw Distance and Position

Throw distance is the distance measured from your projector to the screen. This calculation
determines if there is enough room to install your projector with a desired screen size and if the
image size will be the accurate size for your screen. To estimate the throw distance take the
horizontal width of the screen and multiply it by the lens throw ratio. The result determines
approximately the distance the projector should be positioned from the screen to project a focused
Mirage WQ-L User Manual
020-101372-01 Rev. 1 (04-2014)
Installation
Focusing screw
Field curvature
locking screw
17