Tsunami - Beckman Institute Laser Resource Center

Tsunami
On rare occasions, the lower surface requires cleaning:
3. Remove the filter from its mount.
a. Turn the micrometer counterclockwise until the mounting set
screw of the filter holder is accessible (Figure 9-3).
b. You may find it helpful to mark both the mount and the edge of
the filter plate with a soft pencil so, when finished cleaning, you
can use the pencil marks to quickly re-register it in the mount
when you replace it. This will avoid having to do a realignment.
c. Loosen the setscrew using the Allen wrench provided in the tool
kit, and gently lift the filter assembly out by its mounting ring.
4. Clean each surface using a folded tissue and hemostat according to
step 3 of "General Procedure for Cleaning Optics." Use very little
pressure; the filter is made of thin material and is easily damaged.
5. Install the filter assembly.
a. Rotate the filter by hand until the pencil markings on the holder
match that on the mount (refer to step 3). If a realignment is
required, use a monochromator and ir viewer, and refer to chapter
6, "Alignment: Selecting, Installing, and Aligning the Bi-fi
Filter."
Bi-fi Wavelength Selector (ps)
Location
for Bi-fi
Filter Holder
Setscrew
Figure 9-3: Birefringent Filter
I
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