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5
Cleaning Information
CAUTION
How to clean instruments with an optical glass plate
How to clean instruments with a physical contact interface
WARNING
104
Only use clean, dry compressed air. Make sure that the air is free of dust,
water, and oil. If the air that you use is not clean and dry, this can lead to
filmy deposits or scratches on the surface of your connector interface.
This will degrade the performance of your transmission system.
Never try to open the instrument and clean the optical block by yourself,
because it is easy to scratch optical components, and cause them to
become misaligned.
Some instruments, for example, the optical heads from Keysight
Technologies have an optical glass plate to protect the sensor. Clean this
glass plate in the same way as optical lenses (see
page 103).
Remove any connector interfaces from the optical output of the instrument
before you begin the cleaning procedure.
Cleaning interfaces is difficult as the core diameter of a single-mode fiber
μ
is only about 9
m. This generally means you cannot see streaks or
scratches on the surface. To be certain of the degree of pollution on the
surface of your interface and to check whether it has been removed after
cleaning, you need a microscope.
Never look into an optical output, because this can seriously damage
your eyesight.
To assess the projection of the emitted light beam you can use an infrared
sensor card. Hold the card approximately 5 cm from the interface. The
invisible emitted light is projected onto the card and becomes visible as a
small circular spot.
Keysight 81618A/9A and Keysight 81620B/3B/4B/6B/8B Optical Heads User's Guide
How to clean lenses
on
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