text: import poptics.wavelength as w
  from poptics.tio import getFloat, tprint
  import matplotlib.pyplot as plt
  
  def main():
  
  
  
      l0 = getFloat("Lambda_0",0.08)
      beta = getFloat("Beta",1.25)
      index = w.Sellmeier(beta,l0)
  
      nd = index.getNd()
      vd = index.getVd()
      tprint("Nd index : ",nd," Abbe No: ",vd)
  
          
      index.draw()
      plt.show()
      
  main()
  
  