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Instructions for Use
7 Cleaning and Disinfection
CLARUS 500
7.3 Cleaning the Front Lens
2660021165005 Rev. A 2017-08
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5. To verify that cleaning has been successful, take a photograph
in a darkened room. Check the resulting image for bright spots.
Figure 23: Residual Bright Spots after Cleaning
7.3.4 Cleaning the Front Window Lens
7.3.4.1 Cleaning Heavy Contamination
Fingerprints, oil, or water spots should be cleaned immediately.
Skin acids attack coatings and glass, and can leave permanent
stains. Cleaning with solvents alone tends to redistribute grime.
These contaminants must be lifted from an optical surface with
soap or other wetting agent. The optic is then rinsed in water and
the water removed with alcohol. Acetone helps speed drying and
helps eliminate streaks from forming.
Action
1. Blow off dust.
2. Using a soap-saturated lens tissue placed around a swab, wipe
the optic gently in a figure-eight motion.
3. Repeat as necessary.
4. Repeat this procedure with distilled water.
5. Repeat again with alcohol.
6. Repeat once more with acetone.
7.3.4.2 Brush Cleaning Method
This technique is ideal for cleaning smaller optics, including lenses,
and involves holding a folded lens tissue with a hemostat to brush
the surface clean.
NOTE
Edges on mounted optics
are often hard to reach.
u
Wrap a lens tissue around a swab.
u
Soak the covered swab in acetone.
u
Brush around the edge of the lens and then across the middle
using a continuous figure-eight stroke.
u
Repeat if necessary.
Action
1. Fold a lens tissue so as not to touch the part of the tissue that
will make contact with the optic. The fold should be about as
wide as the optic.
2. Hold the tissue with hemostats parallel to and near the fold.
3. While holding the optic, using tweezers if necessary, blow off
any dust.
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