J.A. Woollam M-2000, Hardware Manual

Page: 77 / 178

M-2000® Hardware Manual ©2023 J.A. Woollam Co. 77
7. Align the sample Height. Maximize "Average Signal Intensity" shown
across the bottom of the Alignment Screen by adjusting Z-height with
PageUp/PageDown keys. Change Z-Stage increment to smaller value and
ensure Max Signal is found.
Figure 4-46. Adjusting for Maximum Signal Intensity.
Note: Iterate between the "Tip-Tilt" and "Z" alignments until both are
optimized at the same time. When both are optimized
simultaneously, the sample stage is aligned to the Measurement
Beam.
Lookdown Detector Alignment
After the Sample Stage has been aligned to the measurement beam (previous
section), the Lookdown Detector can be aligned to the same sample before it is
moved. There are two options for Lookdown Detectors:

Quad Detector (standard)

Camera Detector (fast)
Note: It is very important that the sample remains in its aligned condition
from the previous section until after this step is completed. The
‘Lookdown’ Detector is secondary to the ‘Receiver’ Detector.
Therefore, if the sample is removed or the Sample Stage is adjusted,
please repeat previous section before proceeding.
Quad Detector Lookdown Alignment
The standard Quad Detector Lookdown is used to perform automated sample tilt
alignment. It uses an LED-based optical system to reflect the beam onto the
detector at normal incidence to the sample.
1. The Alignment Screen should still be open from the previous section. If
not, repeat steps in the previous section (Sample Stage Alignment) to
open the Alignment Screen again. In the Alignment Screen, change the
Detector to “Lookdown".