The model glass in ZEMAX can be used to idealize the dispersion of a material within the visible spectrum.  Model glasses in ZEMAX are entered as a glass solve in the Lens Data Editor, and support three input parameters: the Index Nd, Abbe Vd, and Dpgf (DPg,F).

ZEMAX uses these three input values to approximate the dispersion you wish to create in ZEMAX.  The model glass is fairly accurate within the visible range, but should NOT be used outside the visible wavelength region.  If you are limited to the data available for the glass you wish to duplicate in ZEMAX, the model glass may be an adequate representation of the dispersion of this material. 

References

1.  Schott AG (April 2005).  TIE-29: Refractive Index and Dispersion.  In Technical Information – Optics For Devices (Section 2.2).  Retrieved from http://www.schott.com/optics_devices/english/download/tie-29_refractive_index_v2.pdf.

2.  Schott – Glass Made of Ideas.  2005 SCHOTT North America.  [Online].  September 26, 2005.  Available from World Wide Web: http://www.us.schott.com/english/index.html.

3.  ZEMAX Optical Design Program User’s Guide, ZEMAX Development Corporation