Spectra-Physics Tsunami - Birefringent Filter (Ps Configuration)

Maintenance
9-7
1. Close the pump laser shutter.
2. Clean the rod surface using a folded tissue in a hemostat according to
Step 3 of “General Procedure for Cleaning Optics.”
3. Open the pump laser shutter.
Birefringent Filter (ps configuration)
Typically, only the upward-facing surface of the birefringent filter gets
dusty, and it can be cleaned without removing the filter.
1. Close the pump laser shutter.
2. Clean the top surface using a tissue and hemostat according to Step 3
of “General Procedure for Cleaning Optics.”
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. 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. Install the filter into the holder.
b. Refer to Table 6-3 in Chapter 6 for information on aligning the fil-
ter in the holder.
c. Once the filter is properly oriented, tighten the mounting setscrew
to clamp it in place, but do not clamp it too tight or you will break
the filter.
NEVER remove the rod from its mount. The rotational alignment of the
Ti:sapphire rod is critical and has been optimized at the factory. Any
modification or adjustment other than that made by a qualified Spectra-
Physics Lasers service engineer will void the warranty.
Warning!
The birefringent filter stack is carefully aligned at the factory. NEVER
disassemble the filter stack.
Warning!