Calculating The Lens Offset; Wuxga Projectors - Christie DHD635-GS User Manual

Calculating the lens offset

Adjust the offset to align the image on the screen with half image size.
• The vertical image offset (shift) ranges for the projector are +/-100% (WUXGA) and +/-120%
(HD).
• The horizontal image offset (shift) range for the projector are +/-30% (HD/WUXGA).
• The method for calculating lens offset complies with industry standards. For example for
vertical lens offset:
• At 0% offset (or on axis), the center of the image is on the lens center, so half of the
image appears above and half appears below the lens center.
• At +100% offset, the entire image appears above the lens center.
• The percentage (%) offset is calculated as the ratio of the number of pixels shifted up or
down to half image size.

WUXGA projectors

The following show vertical and horizontal image offsets for the WUXGA projectors:
• Vertical image offset: 0%
GS Series 630-635 User Manual
020-001213-02 Rev. 1 (02-2018)
Lens center
Installation
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