From: John Vede Dudgeon 
To: atm{at}shore.net
Reply-To: John Vede Dudgeon 


A request to all the atm software aficionados out there,

I've been fooling around with David Lewis' mirror cell optimization program
_Plop_ for a few months now, and can't seem to generate 36 or 54 point
ploptimizations, either using the automatic cell design function or in
verbose mode.

I'm hoping to optimize a 54 point cell for the 1" thick, 30"
plate glass blank I've been building around, but so far the best P-V I can
get from Plop is a rather wavy 3.52139e-05 using the auto design for 27
point cell.

After reading Mark Holm's excellent argument for the use of optimized
mirror cells (http://pong.telerama.com/~mdholm/atm/cells/), I understand
the desirability of a well-designed cell with such a thin mirror.

If anyone out there is more expert at using Plop than I am, would you
consider looking at my input values to help me determine what I'm doing
wrong? I've been through the user manual at David Lewis' web page, but
still can't seem to get it right.

Thanks for any help you can provide here.

Regards,

John Dudgeon



; this is a conventional 54 point cell with the supports
; located at the variables radius0, radius1, radius 2, and radius3
var radius0  0.4
var radius1  0.5
var radius2  0.6
var radius3  0.8
diameter 762
thickness 25.4
density 2.45e-06
modulus 6000
poisson 0.22
focal-length 4242.1
n-mesh-rings 20
rel-support-radii 0.4 0.5 0.6 0.8
num-support 6 12 12 24
support-angle 30.0004 19.9972 20 20 basis-ring-size 6
basis-ring-min 0
obstruction-diam 154
optimize radius0 0.01
optimize radius1 0.01
optimize radius2 0.01
optimize radius3 0.01
optimize rel-support-radii 0 0.01
optimize rel-support-radii 1 0.01
optimize rel-support-radii 2 0.01
optimize rel-support-radii 3 0.01
optimize support-angle 0 0.01
optimize support-angle 1 0.01
optimize support-angle 2 0.01
optimize support-angle 3 0.01
part triangle 6 point 0 0 point 1 0 point 1 11 part triangle 12 point 2 0
point 2 0 point 2 0 part triangle 6 part 1 0 part 1 1 part 1 11 part bar 3
part 0 1 part 0 1

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