Ciddor equation. this may be wrong forum, but i dont know where this goes.

[bman!]

hi anyone here use the ciddor equation before?

supposedly there's an equation linking refractive index n of air to the wavelngth of light.

its an equation that i need, but for the life of me i cannot find it as its often on websites that you have to pay for and i have noi money.

would appreciate if someone could give it to me.

 

[tiny-tim]

Welcome to PF!

Hi bman! Welcome to PF!

I don't know what the Ciddor equation (or the Edlen equation) is …

but this link may help you: http://emtoolbox.nist.gov/Wavelength/Ciddor.asp

 

[bman!]

sorry, i ve seen that already.

thing is i need the full function so as to tke the second derivative to calculate the GVD