Appendix F: Glossary of terms
Digital Projection E-Vision 4000 Series
Synchronization
A timing signal used to coordinate an action.
T
Test pattern
A still image specially prepared for testing a projection system. It may contain various combinations of colors, lines and geometric shapes.
TheaterScope
An aspect ratio used in conjunction with a special anamorphic lens to display 2.35:1 images packed into a 16:9 frame.
Throw distance
The distance between the screen and the projector.
Throw ratio
The ratio of the throw distance to the screen width.
TRC (Throw ratio correction)
A special number used in calculating throw distances and throw ratios when the image does not fill the width of the DMD™. TRC is the ratio of the
DMD™ aspect ratio to the image source aspect ratio: TRC = DMD™ aspect ratio / Source aspect ratio TRC is only used in calculations if it is greater
than 1.
U
UXGA
A display resolution of 1600 x 1200 pixels with a 4:3 screen aspect ratio. (Stands for Ultra Extended Graphics Array.)
V
Vertical Scan Rate
The rate at which the frames of the incoming signal are refreshed. The rate is set by the vertical synchronization from the source and measured in Hertz.
Vignetting
Optical cropping of the image caused by the components in the projection lens. This can happen if too much offset is applied when positioning the
image using the lens mount.
Vista
An aspect ratio of 1.66:1.
Reference Guide
Rev A December 2021
page 81
Notes
