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Chapter 3 - How to...
3.4.8.3.4 Cleaning the main mirror
The mirror can be damaged during cleaning. Preventing mirror contamination reduces the
risk of damaging the mirror. It is
clean the mirror if dust particles, smudges or spots have accumulated on its surface.
When cleaning the main mirror, do
Do
touch the edges of the main mirror. The edges of the main mirror are sharp.
NOT
Only clean visible areas of the main mirror. Do
into parts of the device you cannot see.
CAUTION
Do
polish the mirror surfaces; clean only dust particles, smudges or spots.
NOT
Do
wear jewelry (for example rings, watches or bracelets) while cleaning the mirror
NOT
surface as this may damage the mirror.
Dispose of the dirty cloth after each wipe to avoid transferring the dust back on to the
mirror. You will have to use several wipes to clean the mirror.
Depending on the operating environment dust may accumulate on the device that may affect image quality.
To clean the main mirror follow the procedure below:
Note
Points to remember when cleaning the main mirror:
To prevent contamination, take care
l
the mirror.
Only hold the cloth by the corners.
l
1. Capture a reference eye image.
2. Put on powder-free gloves.
3. Remove the eye piece, see How to change the eye piece on the previous page.
4. Inspect the surface of the mirror for visible dust. Take note of any smudges or spots.
5. Fold an Optos-approved cleaning cloth twice so that it has a number of layers.
6. Use single downward strokes to gently wipe the mirror. Always start from the top of the visible area.
7. Check the mirror again for any remaining dust, smudges or spots.
8. If the main mirror still shows smudges or spots, follow the sub-steps below, otherwise go to the next
step.
a. Open an Optos-approved pre-moistened >99.5% IPA (isopropyl alcohol) wipe and fold twice.
Mirror cleaning wipes are available from Optos.
b. Gently wipe individual smudges or spots; only wipe these areas and NOT the rest of the mirror.
c. Inspect the mirror surface and confirm all smudges or spots have been removed.
9. Refit the eye piece.
10. Take another image and compare it to the original reference eye image to determine if the image
quality has been sufficiently improved.
Page 42 of 60
English
recommended to routinely clean the main mirror. Only
NOT
rub the spots too hard, as this may cause damage.
NOT
put your hand or any cleaning material
NOT
to touch the surface of the cloth that will be used to clean
NOT
Part Number: G102748/11_ENG
Copyright 2021, Optos plc. All rights reserved.
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