Re: ATM RAts! Schmitd corrector worksheet problems of Dave Rowe

[Aplanatic@aol.com]

Hi Bob,

Would you like a version of the spreadsheet in Excel 97?  I can also save the spreadsheet in an earlier version of Excel if you'd prefer.  It's certainly possible that the spreadsheet you have has been corrupted.  I don't think I used cell protection.

If you send me your optical design I'll ray trace it as a verification of the Schmidt parameters and then input these parameters into the spreadsheet for you, if you'd like.

Let me know how I can help.

-Dave Rowe-

Bob May wrote:

> I got a copy of the Schmidt Corector spreadsheet from somebody that was
> backdated to Excel version 4.  I have a problem with the spreadsheet on
> cells B33 and B34.  I have a number in there and it sort of looks like there
> should be a formula in there of some kind or another.  I'd like to hear from
> somebody privately that has the original calculator or the guy that did the
> conversion for me.
> I'm in the last stages of getting ready to make a corrector for my 6"
> Schmidt Gregorian and I don't believe that the calculator is working right
> as the vacuum needed to do the corrector doesn't change with changes in some
> of the parameters.
> The program won't change the vacuum needed for the change of the number of
> surfaces from 2 to 1 (something that it should do as the curve needed is
> less for 2 sides than 1!) and other values are also not doing anything.
> I went and moved the A and B values from B20 and B21 down to those positions
> and the numbers do change but I don't know if this is the right thing to do.
> Somebody help?  I don't believe that I'm the first person 
> that has actually
> used the spreadsheet to calculate a corrector plate vacuum.
> Bob May
> http://nav.to/bobmay
> bobmay@nethere.com
> NEW! http://bobmay.astronomy.net