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Materials Needed:
Acetone
Methanol
Cotton Swabs
Low Lint Lens Tissue
10x Magnification Microscope (recommended but not necessary)
Finger Cots
Procedure:
1. Always wear protective finger cots while cleaning the acousto-optic (Ao)
device.
2. Remove cover (if applicable) on the AO device. Inspect the condition of
the protective cove windows (if applicable) with the microscope.
3. Inspect the condition of the optical entrance and exit faces on the
optic with the microscope.
4. Fold a piece of lens tissue to a convenient width so it can wipe the
optical face in one pass.
5. Always use a clean tissue with each wipe to prevent streaks.
6. Soak the tissue with acetone and begin wiping from the middle of the
optical face to the outside edge . Use the microscope while performing
this step.
7. Repeat step 6 with a clean tissue but wipe in the opposite direction or
rotate crystal 180o .
8. Soak another lens tissue with methanol and repeat steps 6 and 7.
9. Soak another lens tissue with acetone and repeat steps 6 and 7.
10. Inspect the optical face carefully with the microscope and repeat the
cleaning procedure, if necessary, this time with damp, not soaked,
tissues.
11. If the optical face still appears contaminated after two or three
cleanings, there may be permanent damage done to the surface. If this has
occurred, the AO device will have to be operated with the laser beam in a
different position on the optical face. This may not be possible on some
AO devices.
12. Use the cotton swabs if some minor touch up is necessary to remove
solvent stains. Use a figure 8 motion or straight strokes.
13. Install cover (if applicable) on the AO device.
DO NOT do any of the following:
a. Do not use anything but low lint lens tissue or cotton swabs to clean
the optical face.
b. Do not blow on the optical face with any type of compressed gas.
c. Do not clean the optical face starting from the beveled edges of the
optic.
d. Do not use any other solvents except for those listed.
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