newAD2 - optical characterization software

Cauchy formula

modelname

Cauchy

Refractive index is described by three parameters \(A, B, C,\) extinction coefficient is zero: $$ n = A + \frac{B}{\lambda^2} + \frac{C}{\lambda^4} $$

attributes

• 2 - Refractive index is described by two parameters \(A,B\).
• exp - Extinction coefficient is described by two-parametric expenential formula \(k = a \exp( -b\lambda )\).

Example

media:
  f = Cauchy:exp

newAD2> par
Af = 1.47       fixed [1,inf)
Bf = 2000       fixed (-inf,inf) nm2
Cf = 8.7e+07    fixed (-inf,inf) nm4
af = 5          fixed [0,inf)
bf = 0.04       fixed (0,inf) nm-1
newAD2>