To: lsayre{at}apk.net, atm{at}shore.net
From: mdholm{at}telerama.com
Reply-To: mdholm{at}telerama.com


Larry,

The 27 point setup below gives 2.50893e-06 mm RMS (about 1/200 wave) and 1.637e-
05 mm P-V (about 1/30 wave) residual deformation.  This isn't bad, and it
is better than I got with a quick run of John Dudgeon's 36-point setup. 
This was obtained from the "stock" 27 point setup in Plop with
varying angles.

Mark Holm
mdholm{at}telerama.com

;This is a 27 point cell with all angles allowed to vary
;The supports are arranged symmetrically in pairs about a single ring
;of three supports. This ring of three supports is located at r3. The remaining
8
;rings are in pairs at r0, r1, r2, and r4. The angles they are located at
;are da0, da1, da2, and da4 on either side of the ring of three supports
;at radius r3.
var r0  0.338475
var r1  0.824307
var r2  0.771943
var r3  0.627517
var r4  0.762267
var da0  33.6882
var da1  14.4994
var da2  50.7276
var da4  34.7321
var a0p  60 + da0
var a0m  60 - da0
var a1p  60 + da1
var a1m  60 - da1
var a2p  60 + da2
var a2m  60 - da2
var a4p  60 + da4
var a4m  60 - da4
diameter 762
thickness 40
focal-length 3048
n-mesh-rings 20
rel-support-radii r0 r0 r1 r1 r2 r2 r3 r4 r4 num-support 3 3 3 3 3 3 3 3 3
support-angle a0p a0m a1p a1m a2p a2m 60 a4p a4m basis-ring-size 3
basis-ring-min 0
obstruction-diam 127
optimize r0 0.01
optimize r1 0.01
optimize r2 0.01
optimize r3 0.01
optimize r4 0.01
optimize da0 1
optimize da1 1
optimize da2 1
optimize da4 1
part triangle 3 point 6 0 point 2 0 point 3 0 part triangle 3 point 0 0
point 4 0 point 7 0 part triangle 3 point 1 0 point 5 0 point 8 0 part
triangle 3 part 0 0 part 1 0 part 2 0

--- BBBS/NT v4.00 MP