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:
- 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.
- 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