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7. Start-up
Fig. 103 Direct arc image and mirror image in target
position (in reality, the image is less focused)
Fig. 102 Direct arc image in target position
(in reality, the image is less focused)
Fig. 101 Direct arc image focused but not centered
(in reality, the image is less focused)
• Then pivot the arc’s mirror image with the ad-
justing knobs (100.2) and (100.4) and focus it
using the reflector (100.3).
• Use the adjusting knobs (100.2) and (100.4) to
orient the mirror image symmetrically to the
direct image (Fig. 103).
The V-shaped irradiation of the direct image
and mirror image arcs can be superimposed.
Caution!
The bright tips of the arcs, the focal spots,
must never be projected onto each other, as
this results in a danger of explosion by over-
heating.
Caution!
The structure of the arc can no longer be
made out clearly in lamps that have been in
service for a long time. The image and mirror
image can no longer be superimposed ex-
actly. In this case, align both images.
• Using the collector, defocus the image with
the knob (100.6) until the arc image and mirror
image are no longer recognizable and the im-
age is homogeneously illuminated.
• Replace the lamp adjustment reflector with
the original filter cube.