Mirror; Cleaning Procedure - Nutfield Technology XLR8 Manual

Nutfield Technology
DO NOT APPLY PRESSURE. DO NOT RUB!
Rubbing may cause permanent surface marks.
4. Blow away residue liquid in one direction with an air bulb.
CAUTION
5. Make sure that no visual contaminants remain on the optical surface.
6. Stubborn stuck-on particles may require an attempt to dislodge them by the local
application of a cotton swab moistened with pure acetone.
7. Finish off as described in (3) above.
8. Organic contamination cannot usually be removed using solvents such as acetone. The
residue should be removed using distilled water and a lens cloth prior to finishing per (3)
above.
5.1.2.1 Back-spatter / Burned-in Damage
Some forms of back-spatter can be reduced or removed using the basic cleaning process. In
general, however, metallic back-spatter or laser-burned-in damage cannot be removed by
cleaning.
It is thus much better to avoid contamination of the optical surfaces by correct implementation
of an exhaust or vacuum system or the use of suitable, easily cleaned protection windows or
disposable windows.
If the extent of the contamination is sufficient to cause process problems (e.g.: local heating of
the optical components, poor beam quality, or destruction of the anti-reflection coatings), then
serious consideration should be given to replacement of the contaminated component. In
particular, badly affected components can cause damage to other optical components, such as
galvanometer mirrors, in the system. Such consequential damage will not be covered by
Nutfield's warrantee.

5.2 Mirror

Never touch the coating of the mirror to avoid any damages on the surface.
There are times, however, when cleaning the mirror becomes a necessity. Follow exactly the
CAUTION
next section, Cleaning Procedure.

5.2.1 Cleaning Procedure

Although the mirrors can, in principle, be replaced by the user, we do not recommend you do
so. Furthermore, Nutfield Technology does not recommend cleaning front surface mirrors.
Mirrors damaged by cleaning are not included under the warranty. The surface of these mirrors
damages easily. It is difficult to prevent hard dust particles from being entrained in the process
and causing scratches. In many cases, small defects in the mirror's surface may be less harmful
than the surface damage resulting from continued cleaning. It requires special equipment
typically not available to customers.
There are times, however, when cleaning the mirror becomes a necessity, e.g. stains such as
fingerprints must be removed immediately to prevent permanent etching of the reflective
surface and rapid deterioration of the mirror's specification with, possibly, catastrophic effects.
The information below includes general recommendations for those special occasions when
mirrors must be cleaned.
91-0021 Rev. D
Copyright © 2010 Nutfield Technology
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