Basic Image Alignment; Offset And Boresight Alignment; Determining Screen Brightness; Basic Optical Alignment Procedure - Christie CP2000 User Manual

2.9 Basic Image
Alignment
2.10 Offset and
Boresight
Alignment
LIT MAN USR CP2000
020-100032-04 Rev. 1 (03/14)
Determining Screen Brightness (fL)
In order for the TPC to display screen brightness in footlamberts (fL), you must
measure screen brightness at both extremes of lamp power (minimum and maximum)
for a given lamp type, and record these two readings in the TPC Admin:Lamp menu
available to installers. These measurements establish a range (stored in memory)
from which the TPC can interpolate all other lamp power settings, converting them to
approximate footlamberts for display in the menus. Repeat the calibration if you ever
switch to a different lamp type/size.
NOTE: For more information about menus and footlamberts, see Section 3.
NOTE: Assumes projector is fully assembled and powered up in its final location.
This procedure ensures that the image reflected from the DMDs is parallel to and
well-centered with both the lens and screen. This initial optical alignment is the
foundation for optimizing images on the screen, and must be completed before final
boresight adjustments.
NOTE: Before you begin:
 The CP2000 must be properly positioned relative to the screen (refer back to
Figure 2.2 and Figure 2.27).

Basic Optical Alignment Procedure

1. Display a good test pattern appropriate for analyzing image focus and geometry,
such as a single crosshair centered across the image.
COARSE FOCUS:
2. Do a quick preliminary focus and (if available) zoom adjustment
with the primary lens only (see 3.8, Working with the Lens). Do not worry about
consistency across the image at this point, just center focus.
CENTER THE IMAGE IN THE LENS:
3.
adjust offsets as necessary until the image is centered within the lens perimeter. A
full white field works best for this.
RE-CHECK SIDE-TO-SIDE LEVELING:
4.
With a good test pattern on screen,
double-check projector leveling (see
2.2, Adjusting Tilt and Leveling) so
that the top edge of the image is
parallel to the top edge of the screen.
See right.
INSTALLATION AND SETUP
Holding a piece of paper at the lens surface,
Figure 2.33. Level the TOP Edge
2-25