5 Maintenance
5-20
4 Place the condenser on a clean paper and detach the O-ring (1A P34).
5 Apply ethanol on gauze and clean both sides of the lens using care not to rub the
joint part of the holder and lens.
6 In case of heavy contamination, rub the lens with gauze with toothpaste. Then,
remove the toothpaste with gauze soaked in ethanol.
Do not soak the lens in organic solvents such as benzene or paint
thinner for a long time or polish the bonding part at the lens end.
It may deteriorate the bonding part and cause poor vacuum
condition.
7 Wipe the lens with dry gauze.
8 Confirm that the lens surfaces are free from any cloudiness. (Be sure to clean both
sides of the lens.)
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