DrZarkov wrote:I wonder if a mirror-drum monitor is much more work than a nipkow-disc monitor. Looks good for a future project...
As Peter says in the article, "...I could not put off the task of adjusting the mirrors. This took many hours and still the alignment is not 100%".
This is a tricky operation as each mirror is in a slightly diffferent position to its neighbour and needs to be correct in two axes.
There is an advantage though, each mirror (in theory) can be set exactly correct unlike a Nipkow disc where once a hole is drilled, that's it!
As a conceptual thought a laser pointer could be used as a reference beam aimed at each mirror in turn, having done some maths the reflection aimed at a template at some distance away and each mirror adjusted to its individual position.
If you look at the picture you can see the three screws and nuts used to adjust the mirrors in two axes.
Steve A.