12.4 Inclination of the tertiary mirror
Here is a picture of the secondary mirror. The curved lines illustrate how the laser point moves on the secondary
mirror, when you rotate the tertiary mirror. (one of them is for the laser in nasmyth focus port A, the other one
for nasmyth focus port B)
The straight line illustrates what happens with the laser point when the tertiary mirror is tilted.
Figure 51 - illustration of effect of tertiary movement
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