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SOM and SM Service News
Surgical Operating Microscopes
No. 10/95
To Service staff
Leica AG
CH-9435 Heerbrugg
(Switzerland)
Date/from June 28, 1995 / 3077-HWE
File
Workshop binder “Service News” / Service manual M695
Re.
M695 surgical microscope in conjunction with
multifocus objective 445 944
Multifocus objective on M695:
Readjustment of the illumination
Restriction of illuminated
area
When the multifocus objective is used with the M695, the illuminated
area available to the surgeon may be shadowed or vignetted even when
the the lamp is correctly adjusted.
lnspect the illumination
When you use the multifocus objective for the first time, inspect the
illumination:
l
Engage the shortest working distance (the shortest focal length).
l Engage the lowest zoom position (7).
l
Inspect the illuminated fields produced by both of the lamps in the
lamp changer.
l
If the illuminated area is noticeably restricted, readjust the lamps.
Readjusting the lamp
The illumination of the field of view is influenced by the distance
between the lamp and the condenser lens. This distance can be changed
by means of the eccentric stop cam on the lamp changer. To obtain
uniform illumination, reduce the distance between the lamp and the
condenser lens.
Adjust the eccentric stop cam for both lamps in the lamp changer:
1. Remove the multifocus objective and push the filter slide of the
M695 optics carrier towards the objective. Beneath the filter slide
you will find the adjusting screw for the eccentric stop cam.