Maintaining Piv Optics; Cleaning Or Replacing The Shg Crystal - Continuum Surelite I 10 Operation And Maintenance Manual

Continuum Surelite Laser

Maintaining PIV optics

Periodically inspect the crystal and surfaces of all PIV optical components for dust,
discoloration, and damage. Cleaning or replacing them, if necessary, will promote
good system performance and longer lifetime. Be sure to replace the laser cover when
finished.
Systematically examine the surfaces of each optic and oven window for dust,
fingerprints, discoloration, and burn marks in the surface coating. Use a bright
flashlight to light the surfaces. An inspection mirror may also be helpful. Inspect the
SHG crystal without opening the oven. Please refer to your YAG manual for details
about inspecting, cleaning and replacing optics.
Note:
the center of the optic. If solvent reaches the edge of the optic, it may
dissolve mounting glue, contaminating the optic. Do not apply pressure
during cleaning, for these optics are thin and delicate.

Cleaning or replacing the SHG crystal

The SHG (doubling) crystal is mounted in a sealed oven, and damage to a crystal face
can be seen through the oven window. Continuum recommends that the entire oven
assembly be exchanged when the inside of a window or a crystal face shows damage.
To remove the crystal oven assembly, do the following:
1. With both lasers off, loosen the pair of screws holding the oven to its rotating
stage. These two screws are at the top of the oven and face laser A. Also
unplug the 9-pin heater cable from the oven.
2. Remove the oven and replace it with a new one. Retighten both screws and
reconnect the heater cable.
3. Phase match the crystal using the SHG toggle switch.
94
When cleaning the dielectric polarizer or a wave plate, only clean
996-0207