HP 8168E User Manual page 229

Other Cleaning Tools
To examine devices you also require:
Microscope Select a microscope with a magni cation range of between 50X and 300X.
These should be available from photographic stores or laboratory suppliers.
Ensure that the light source of the microscope is exible. This helps you to
examine your device closely and from di erent angles.
A microscope allows you to determine the type of dirt on your device and its
extent. Then you can choose the correct cleaning procedure and later to
examine the results of cleaning. With a microscope you can also determine if
your optical device is scratched.
This is typically available from photographic stores or laboratory suppliers.
Ultrasonic bath
An ultrasonic bath very gently removes greasy and other stubborn dirt from
optical devices.
Only use an ultrasonic bath with isopropyl alcohol, as other solvents can
damage or dirty your optical device.
Warm water and Use water only if you are sure that your optical device will not corrode or be
damaged. Do not use hot water, as this can lead to mechanical stress that can
liquid soap
damage your optical device. Ensure that your liquid soap has no abrasive
properties or perfume in it, as these can scratch or damage your optical device.
Do not use normal washing-up liquid, as it can leave behind an iridescent lm.
These are available from HP. The part number is HP 92193N (80 Wipes per
Premoistened
box). These are tissues that are moistened with isopropyl alcohol.
cleaning wipes
This is typically available from professional photographic stores or laboratory
Polymer lm
suppliers.
Polymer lm is very gentle on optical surfaces and is particularly good for
cleaning extremely sensitive devices such as mirrors.
This is typically available from laboratory suppliers.
Infrared sensor
card
With this card you can qualitatively check the uniformity of your emitted laser
light, because when the laser light is projected onto the sensor card it becomes
visible.
Lens Cleaning Some lens cleaning papers and cleaning kits available, for example, in
photographic stores are not suitable for cleaning ber optic devices. To be sure,
Paper
please ask the salesperson or the manufacturer.
Cleaning Procedures E-3