Filter
Top Products
7
Picture 2 below shows first success:
The laser’s light dot is correctly centered within the marker circle.
Most telescope constructions adjust the
secondary mirror by three loaded screws
like those (allen head screws) shown
here in the picture.
In other words: Turn one screw slowly
clockwise and the secondary mirror is
tilted in the direction towards this screw.
When the laser’s light point is centered
correctly in the marker circle, successful
adjustment of the secondary is achieved.
Step 2
Possibly the main mirror’s optical axis might be additionally tilted against that of the secondary mir-
ror. Please observe the reference grid of the Laser-Colli™. If you see the reflected laser light
point already somewhere on the grid pane (next picture below) you are closing in on final success.
The final action is to tilt the main mirror so as to make the laser beam reflected into itself and re-
pass through the small hole in the reference plate.
If you see this on your reference plane, adjust (tilt) your main mirror in
a way that the laser point passes exactly through the center hole thus
being reflected into itself.
Now your Newtonian optics are perfectly
collimated.
Remember to switch off the Laser Colli
whenever you don’t need it, otherwise
the batteries will be exhausted very
quickly.
Adjusting (tilting) the main mirror of a Newtonian is (nearly) al-
ways done either by three single screws or by three pairs of
screws both of which being spread 120° apart.
Details are shown in the sketch .
When there are only three single screws (upper sketch) the tilt of
the main mirror is effected by spring-loaded screw.
Once more: Turning one of the screws clockwise tilts the main
mirror towards this screw.
On most larger Newtonians, 3 pairs of push/pull screws are used (lower sketch).