mercoledì, novembre 07, 2007

Unusual ways of lateral restraining

Here are some "strange" ways to make a lateral support. Picture 1 ia a mirror (same of previous post) suspended at the sides of the horizontal diameter. In a certain sense it is the worst case of sling friction (infinite friction). The rms surface displacements (piston, tilt, tip and defocus removed) ia 6.5 nm.
Picture 2 is the same mirror, suspended with vertical wires attached near the top, at +/- 30° from the vertical diameter. The rms surface displacements is 7.7 nm.
Although the latter may seem bad, one should consider that the suspension is "self aligning" and maybe it might naturally stay close to the ideal configuration (TBC).