Figure 2-9: Shutter Rotated Out Of Beam Path; Figure 2-10: Hene Bullseye Pattern - NORTHROP GRUMMAN Iklwa II TEM00 Service Manual

6. Using clean paper as a screen, check for bullseye in front of the output
7. Shim and rotate the laser module to align the rod reflection back to the 1st
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Figure 2-9: Shutter Rotated Out of Beam Path

coupler. Check module rod reflection back to pinhole location 1 with the
HeNe. See Figure 2-10. If needed, adjust the fold mirror mount to obtain the
proper bullseye pattern and module rod reflection back to pinhole location 1
as described below.
a. Adjust Fold Mirror for tip/tilt (shims required), and rotation to get a
bullseye.
b. Verify module rod reflection on pinhole location 1. If needed, move fold
mirror forward and backward to adjust module rod reflection horizontally.
c. Repeat steps a and b as needed to obtain the correct bullseye pattern and
module rod reflections in the horizontal axis.

Figure 2-10: HeNe Bullseye Pattern

pinhole as close as possible. Verify bullseye pattern as described in step 6.
Chapter 3: Tuning and Testing Procedures
21 Patara II and Iklwa II Service Manual