Importing Doublets

This article outlines the general process for importing a Cemented Doublet from an optical model, using an Edmund Optics 45089 Achromat as an example (Zemax file used).  When FRED imports a doublet, two individual singlet elements are created and the user has two options:

  1. Use FRED’s Glue feature to specify a glue layer thickness between the two singlet elements. This has the effect of adding thickness to the doublet.
  2. Do not apply FRED’s Glue feature but modify the imported singlets to remove a surface coincidence problem at the common interface.

These two options are described in detail in this article.

Download the PDF: Importing-Doublets.pdf

Download the FRED document file: Doublet-Import-Example.frd