Section 11: Standard and Optional Machine
Features
150
Optional Lenses
Optional lenses are available for EX systems only in 1.5, 2.5, and 4.0 inch focal
lengths. Optional lenses are not available for TT models.
Spot Size, Focus Length, and Depth of Field
A 2.0 inch lens is supplied as standard equipment on all Legend EX and TT systems.
The 2.0 inch lens is a very good general purpose lens that will fit the needs of most
engraving and cutting applications. There are three optional lenses available for the
EX line of lasers to provide maximum versatility for all of your engraving and cutting
needs. The spot size of the laser beam can be changed by installing a different lens
assembly. A small spot size (achieved with a 1.5 inch lens) is used for higher
resolution engraving to achieve finer engraving detail. A larger spot size (2.5 inch
lens) can be used for lower resolution engraving and is also used for vector cutting.
The 4.0 inch lens is used for specialized engraving applications and is a popular
choice for cutting thick acrylic.
This diagram shows the vertical positioning of the 2.5, 2.0 and 1.5 inch lenses
(Legend EX only). It illustrates why auto-focus and a single manual focus gauge
work with all three lenses.
Instead of changing the length of
the manual focus gauge, or
supplying a different gauge with
each lens, we place the different
lenses at their appropriate height
relative to the work piece.
This setup allows the auto focus
to work automatically with all
three lenses without user input.
Please Note: Simply moving the
2.0 inch lens (or any other lens)
to a different position on the lens
assembly does not change the
optical characteristics of that lens.
You must change the entire lens
assembly.
2.5 “
1.5 “
2.0“
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