Spin Reversal Note Updated

Correct the spin-up time mistake (8hours to 13hours). And get the experimental value which is pretty consistent with the expected value.

Check the Spin_Reversal_technote.pdf file

Surface_Shape compared to Perfect Surface

Check the Z_Shpe.pdf and Sim_Ronchi.pdf file

Parabolic MIrror Fit

Whit asked Machine shop to map the whole mirror and get 4 groups of data--x1, y1, x2, y2.
x1,y1
One Set of data, 90 deg difference
x2,y1
Rotate Mirror 45 deg, another set of data, 90 deg difference

1Q.pdf
Fit x1 through y2 by using function x^2/Q=z or y^2/Q=z, assuming y or x is zero.

2Q.pdf
Fit x1,y1 and x2,y2 by using function x^2/Q1+y^2/Q2=z

I find Q=1690mm=66in

Check the PDF file