More Examples, using actual data from peoples mirrors.
Links to pages with the 'surf' prefix will start the Surf Java Applet.
There are two mirror examples in the 'Tele-Topics' article.
Below are links to 'Surf' Applets set up for the two mirrors.The light source on the tester is stationary for these two mirrors.
Using a reference parabola of slightly longer focal length ( ROC that is ) seems to improve the observed figure for the 8 inch example.
On the following examples the light source moves with the knife edge. surf_Tom.html This 4 1/4 inch mirror shows the mirror edge about .12 wave high.
Bob here are the links for the two programs I use for testing.
FIGURE45.EXE
web site http://www.atmsite.org/contrib/Rowe/foucault/TEX - MIRROR NUMBER CRUNCHING MADE EASY
Version 3.2b
web site http://home.att.net/~mikel/what I like about FIGURE45 is it shows a realistic shape of the mirror
surface so I can see what zones to work.
TEX is more flexible it allows one to enter as many sets of readings as
one cares to, prints out the couder mask, and has a
Monte Carlo Algorithm.
This is a link to Jim Burrows site which has lots of math.
http://home.earthlink.net/~burrjaw/atm/odyframe.htm
http://home.earthlink.net/~burrjaw/atm/atm_math.lwp/atm_math.htmhttp://home.earthlink.net/~burrjaw/atm/
This should help make sense of what I was showing you last night. If you
want more readings let me know.
Thanks for coming down to our class.
Tom F
surf-Richard-O.html The 'Surf' program shows this unfinished 14 inch mirror to be about .4 wave over corrected
using a referece parabola of 134.4 inch ROC. And the 90 to 100 percent zone to be .2 wave high if a reference parabola of 134.1 is used.surf_Mike_L.html This is the thin 20 inch mirror we have been following. See the folder 20s_13in_tool.
Mike L. has supplied me with data for this mirror showing the progress of mirror figuring.BACK to instruction page.