Keysight Technologies 81490A User Manual page 75

Cleaning Information
Additional Cleaning Information
74
The following cleaning procedures may be used with other
optical equipment:
• How to clean bare fiber ends
• How to clean large area lenses and mirrors
How to clean bare fiber ends
Bare fiber ends are often used for splices or, together with
other optical components, to create a parallel beam. The end
of a fiber can often be scratched. You make a new cleave. To
do this:
Strip off the cladding.
1
Take a new soft tissue and moisten it with isopropyl
2
alcohol.
3 Carefully clean the bare fiber with this tissue.
4 Make your cleave and immediately insert the fiber into
your bare fiber adapter in order to protect the surface
from dirt.
How to clean large area lenses and mirrors
Some mirrors, as those from a monochromator, are very soft
and sensitive. Therefore, never touch them and do not use
cleaning tools such as compressed air or polymer film.
Some lenses have special coatings that are sensitive to
solvents, grease, liquid and mechanical abrasion. Take extra
care when cleaning lenses with these coatings.
Lens assemblies consisting of several lenses are not normally
sealed. Therefore, use as little liquid as possible, as it can
get between the lenses and in doing so can change the
properties of projection.
Preferred Procedure Use the following procedure on most
occasions.
1 Blow away any dust or dirt with compressed air.
Procedure for Stubborn Dirt Use this procedure when there is
greasy dirt on the lens:
Keysight 81490A Reference Transmitter Module User's Guide, Edition 3.0
Cleaning Instructions