SERVICE MANUAL
Rev. 05/2005
P - 53
b) Focus at 1 and 2
Adjust Energy at 0.5mJ, select 1 pulse in "Burst" mode.
It is necessary to defocus the slit lamp to make a hole in the teflon :
- Focus at 1 : shift of 100 microns from focus position 0
- Focus at 2 : shift of 200 microns from focus position 0
8-1-5 LASER MODE CHECKING
The shape of the impact must be as round as possible.
Adjust Energy at minimum 10mJ and 0 focus.
Shot on a thermosensitive sheet with a backward defocus.
Check the impact on the thermosensitive sheet.
Example of ideal impact :
Check the impact is the same following different pulses of the burst mode
(1, 2 and 3 pulses).
8-1-6 ENERGY CHECKING
First checking :
Adjust the energy knob at 3mJ or 5mJ. Select 1 pulse.
When the laser is firing you should observe a "spark" at the focus plane
and hear it.
Second checking :
You must check the energy with an energymeter (or scopmeter with a
Genter cell) :
The energy readings must be in the range of the limit values which are
indicated in the following chart :
Burst mode : 1 pulse
Energy
displayed (mJ)
0.5
0.7
1.0
1.3
1.6
2.0
3.0
5.0
7.0
10.0
Tolerance
+20%
0.7
1.0
1.2
1.6
1.9
2.4
3.6
6.0
8.4
12.0
Tolerance
- 20%
0.3
0.5
0.8
1.0
1.3
1.6
2.4
4.0
5.6
8.0
Energy
8 - OPTICAL ADJUSTMENTS
