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Re: [ATM] Baffles in a Complex Design
Richard,
"Take the easy way out"- the way I did, with my dull brain. Get some "Banner
paper" from a grocery store, and layout the optical paths to correct scale;
i.e., one to one. Then you will see plainly if and where you need baffing;
draw the focused cones of light the correct focal length, but do not let
them end in a point, but rather, the diameter of your field of view (in
inches, or centimetres).
No visualizing in 3-D is required; only 2-D.
For lazy guys like me!!!
Davey
P.S.- At Lowe's one can buy a 78" milled aluminum level- the kind
construction contractors use- it is pretty straight (my 72 and my 78 are in
the pawn shop!!!) and use it as a straight edge; it is pretty straight.
----- Original Message -----
From: "Richard F.L.R. Snashall" <rflrs@rcn.com>
To: "ATM List" <atm@atmlist.net>
Sent: Sunday, March 23, 2008 6:30 AM
Subject: [ATM] Baffles in a Complex Design
>I have a lot of trouble visualizing in 3-D. With the prescription
> (200 mm f/8; 1.5 degree field):
>
> Title: schiefspf8x
>
> Surf Radius Thickness Glass Diameter Conic Tilt
>
> 1 Infinity 569.71 214.92 0 0
> STO Infinity 0 200 0 0
> 3 -2390.9 -598.053 MIRROR 203.56 -2.067 8.855
> 4 -1554.9 822.739 MIRROR 119.04 -6.6 -15.435
> 5 -1578.3 -327.894 MIRROR 124.12 -2.47 -8.855
> 6 Infinity 216.673 MIRROR 97.86 0 -36.148
> IMA 1143.6 44.66 0 -19.583
>
> what problems will there be baffling it? If so, can it still be
> solved (the exact geometry is somewhat flexible, I think, but
> may affect the 0.983 green Strehl some) and, if so, how would you
> solve it?
>
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