Basic Calculation - Digital Projection HIGHlite Laser II 3D Series User Manual

Digital Projection HIGHlite Laser II 3D Series

Basic calculation

Identify the required lens by calculating the throw ratio.
A throw ratio is the ratio of the throw distance to the screen width:
Throw distance
Throw ratio =
Screen width
1. Use the formula above to obtain the required throw ratio.
2. Match the throw ratio with a lens from the table below:
Throw ratios
0.77 : 1 fixed lens
1.16 : 1 fixed lens
1.45 - 1.74 : 1 zoom lens
1.74 - 2.17 : 1 zoom lens
2.17 - 2.90 : 1 zoom lens
2.90 - 4.34 : 1 zoom lens
4.34 - 6.76 : 1 zoom lens
3. Ensure the required throw distance is within the range covered
by the lens.
Reference Guide
Throw distance range
1.3 - 15 m (4.3 - 49.2 ft)
1.4 - 25 m (4.6 - 82 ft)
1.8 - 9.3 m (5.9 - 30.5 ft)
2.2 - 11.8 m (7.2 - 38.7 ft)
2.7 - 15.4 m (8.9 - 50.5 ft)
3.6 - 22.5 m (11.8 - 73.8 ft)
5.5 - 35 m (18 - 114.8 ft)
CHOOSING A LENS
1
2
The basic calculation on this page
does not take into consideration
DMD™ and image size, which could
affect the throw ratio. For a more
complex and realistic calculation,
see
section.
When calculating the throw ratio, be
sure to use identical measurement
units for both the throw distance and
the screen width.
Screen width
1
For information about individual lens
Throw distance part numbers, see
2
the end of this document.
See also
at the end of this document.
Do not use the short lens hood
with the 4.34 - 6.76 : 1 zoom lens.
For further information about using
the right lens and hood, see
lens hood
Quick-Start Guide.
Notes
Full lens calculation
in this
Appendix A at
Appendix B: Lens Charts
The
in the Installation and
Rev B December 2016
page 83