Re: ATM Matching Ronchigrams

["Bill Kelley" <flex@commspeed.net>]

Russell,

Download Ronchi for Windows- a simulation. Compare with yours.
http://hometown,aol.com/ronwin20/

Bill


>
> ("atm@shore.net")
>
>    Hello all,       I have printed out matching ronchigrams for my 5/8"x9"
> mirror that I have been polishing
> and figuring forever.  I do believe I am close... I have a slight turned
> down edge that I have brought
> down from a bad turned down edge. My focal length is 42.5" .   While
trying
> to match the images
> at the six stations.. -.3,  -.1,  +.1,  +.3,  +.5,  +.7....... my images
are
> close but I am lost as to which way
> I have gone..   I am using an 85 line ronchi screen (although I have a 135
> line) and this is what I
> used for the ronchi printout.
>           My questions.....     at -.3 the diagram shows 8 lines
visable,...
>   I only have 6 visable..
>                                             at -.1 the diagram shows 4
lines
> , with the two centers with deep bows out,...
>
>                       I see  3  but not as bowed.
>                                              at +.1 the diagram show two
> "dark eyes" on each side of the center...
>
>                        I see a baseball stitch curve to the inside.
>    I don't know if this is enough information, It is hard to describe
> verbally. I am in the process of making
> a website so that photos can be seen, (well my son is) anyway to my
> question... Am I too far in? on my
> Parob.,  or is it I haven't gone deep enough??  Sounds stupid but I don't
> think I am deep enough,
> am I wrong..              Russ Jocoy
> ("atm@shore.net")
>
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