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GB
O
PERATING INSTRUCTIONS
The duration of use of the outlet surface Ì
increases with increasing optical fibre diameter
and decreasing pulse energy, in particular in
the subablative area. Furthermore, the end
face is subjected to less stress at a larger
distance than in the immediate vicinity with
perpendicular orientation of the optical fibre
to the surface. Soft tissue causes less stress
for the optical fibre than hard tissue.
Impairment of performance by unsatisfactory
outlet surfaces is evident from the fact that
Ì
the pilot beam is scattered to a slightly greater
extent compared with the new state, or the
\
material-removing effect of the working
beam declines. A worn outlet surface 6 can
be repaired with the aid of the abrasive paper
supplied (Order No. 0.574.2692). In this
case, the optical fibre is held in the hand
towards the outlet end and is ground
perpendicular to the surface of the abrasive
paper by moving the abrasive paper back and
forth 10 times (approx. 1 cm grinding
length).
The satisfactory condition of the coupling-in
side \ of the optical fibre is evident from
the fact that the optical fibre projects within
the slot 1.5 mm from the hole in the optical
fibre plug. If the fibre is broken off on the
coupling-in side, the optical fibre plug should
no longer be used and should be replaced by
a new one.
The light transmission should be subjected
to a qualitative test by viewing the coupling-in
surface axially and turning the outlet surface Ì
alternately towards light and darkness. The
brightness of the coupling-in surface
changes depending on the lighting conditions.
A coupling-in surface which is dark in spite
of illumination indicates damage to or dirt
on the optical fibre. If necessary, the optical
fibre plug should be ground on the outlet
side or completely replaced.
2058, E 2055, P 2056
17
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