User guide

Page 62 Document No: 11294 LBA-USB User Guide
Beam Colors
The choice of beam display colors depends on the display mode selected. There
are three choices available in both 2D and 3D modes, plus 2 additional choices in
3D mode:
 Color Bands – 16 colors plus white to indicate intensities at or near A/D
converter saturation. Available in both 2D and 3D.
 Color Continuous – 128 colors plus white to indicate intensities at or near A/D
converter saturation. Available in both 2D and 3D.
 Gray Scale – 128 shades of gray plus red to indicate intensities at or near A/D
converter saturation. Available in both 2D and 3D.
 Green – Available only in 3D mode. A monochrome shade of green that can be
used with laser goggles that do not filter the green wavelengths. White is used
to indicate intensities at or near A/D converter saturation.
 Yellow – Available only in 3D mode. A monochrome shade of yellow that can be
used with laser goggles that do not filter the yellow wavelengths. White is used
to indicate intensities at or near A/D converter saturation.
Note: In the above selections, data that represents negative energy values will
be displayed in dark gray, except in the case of the gray scale, where
they appear in dark blue.
 User Palette – This selection allows the user to select a custom designed color
palette. When selected, a Palette
button appears in the Display Toolbar.
Click this button to select a custom palette file for both 2D and 3D displays. Also
see section 2.2.11.
These basic color schemes can be augmented by some other display choices. For
example: choose a Z Axis Scaling value greater than x1, enable 3D Contour
displays, and make Beam Display selections that involve more than one beam
at a time all modify how the beam will be displayed.
Z Axis Scale
Expand the intensity or Z Axis Scale in both 2D and 3D display modes. An
expanded Z-axis provides a more detailed view of a narrow range of intensities.
Z-axis scaling yields slightly different imaging results depending upon which
Beam Colors have been selected. To activate Z Axis Scaling, select a
magnification factor greater than x1. A good value to practice with when using
this feature is a conservative x2. When Z-axis scaling is activated, a vertical
scroll bar appears along the right edge of the beam display window. Use this
scroll bar to slide the expanded viewing range up or down the full Z-axis scale.
In 3D mode, it is easy to see where the expanded display region boundaries end
and the outside region begins. As a clue in the 2D display mode, a pair of dashed
lines indicates the magnified range in the Cursor Profiles. Of course, to see
these indicators, Cursor Profiles must be turned on and the cursors must pass
through the beam profile.
For best results, use Z Axis Scaling with Beam Color set to Color
Continuous, 2D Cursor Profiles turned on, and Cursors set to Centroid.
Note: A good time to use Z Axis Scaling is when viewing the low energy down in the
wings of the laser beam. Kick the scaling up to x8, leave the scale scroll bar at