S
S
E
E
R
R
V
V
I
I
C
C
E
E
M
M
A
A
N
N
U
U
A
A
L
L
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ESIRIS -
- Version 1.0 Date: 22.09.00
Controlling
The system controlling is located inside the device tower besides the patient bed. It
includes all voltage delivery units, input fuses and the control computer. Monitor and
using keyboard are located at the front-wall of the
ESIRIS
.
The controller can easily interact with the
SCHWIND ESIRIS
through input keyboard
and monitor. Inputs into the computer are menu controlled, so that input mistakes
can be avoided mostly. Release of treatment procedure is done with the footswitch.
Patient Bed
The patient bed should enable a simple way of exact and stable storing of the patient
as well as the adjustment of the treated eye at the ablation area.
Foot Switch
The footswitch is used to release the treatment procedure. This switch has two
switch points to avoid unintentional release of pulses. The treatment procedure can
be interrupted any time by releasing the footswitch. The program remains active, so
the treatment can be continued afterwards by pushing the footswitch again.
Rinsing of Optical Beam Delivery System
Radiation of ArF Excimer laser is 193 nm, and so it is at the outer limit of spectrum
area of ultra violet that is air transmitted. Partially absorption through air oxygen
lowers the radiation noticeably and ozone is produced. This would damage the
optical components, if it would accumulate inside the delivery system. Based on this,
it is useable to flood the way of radiation with an oxygen poor gas, which is also good
transparent at 193 nm.
For rinsing, nitrogen with a quality of 5.0 has been proved as very good. Nitrogen can
be stored and transported easily in pressure bottles, is in a low price limit and non-
toxic.
For optimising consumption of rinsing gas, the gas flow is controlled automatically
inside the containment of optical system. A flow control checks the nitrogen flow. If
the gas is getting empty inside the pressure bottle, the monitor of the control unit
displays a message.
