[ATM] refractive index of air

[Richard]

Hi Richard,

Wednesday, August 8, 2007, 1:42:30 PM, you wrote:

R> it is definitely N,
R> not N^2, as you can easily show by putting lambda=1 (micron) and
R> getting the correct answer of N=1.00027.

Or not... It did the first time I tried it...  honest...

DLW>> I am polishing the primary; secondary has only seen rough grinding thus far.

R> Ah, you're doing it in the correct order  

Erm.. or not... I think you'd better ignore me today.

If you still have the option, it's much easier to finish the secondary
first, and then tweak the design to suit the final secondary before
finishing the primary if you can. Far more difficult to try to get ROC
and K of the secondary both to exact design spec.


-- 

Best regards,
  Richard in the UK