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
7 of
79
___________________________________________________________________________
_______
ESIRIS -
- Version 1.0 Date: 22.09.00
Accessible Beam Area
The beam area of the device is horizontal down from the output opening to the next
surface. Normally this is the patient bed or, in case of treatment, the patient eye.
Diameter of beam at the output opening is app. 1,0 mm. In the treatment area, which
is 290 mm under the output opening, the beam has a diameter of 1,0 mm. Output
and energy density of beam decreases accordingly with increasing distance from
treatment area.
Protection Glasses
All persons inside the room (except the patient) have to wear protection glasses
according to DIN EN 207, when the laser is working. These glasses must have
protection level 7 for beams of 193 nm. The operating surgeon can put-off the
glasses, when he looks through the microscope. The glass optics of the microscopes
weaken the laserbeam, so that the necessary protection level is achieved. Protection
level of glasses depends on maximum existing middle output density (at max. pulse
following frequency) or the maximal energy density. These values are 5 x 10
2
J/m
2
.
