ZEMAX model data
File type: Various data file
A uda file extension identifies a ZEMAX user-defined aperture data file. A uda file stores data used to define an aperture in an optical model.
File type category:
Various data file
Date updated: November 3, 2026
The uda file extension is associated with ZEMAX optical and illumination design software, now represented by the OpticStudio product line.
A uda file contains data for a user-defined aperture used in sequential or non-sequential optical system models. It is an input file for the aperture definition rather than a complete optical model.
The format is used with the Windows version of ZEMAX/OpticStudio when a model uses a user-defined aperture.
Use ZEMAX or OpticStudio on Microsoft Windows to load the uda file as a user-defined aperture. The file is normally used from within an optical model rather than opened as a standalone document.
A uda file is a software-specific aperture definition and has no general-purpose conversion format. To use the aperture in another ZEMAX model, load or select the file from that model's user-defined aperture settings. ZEMAX may be able to export *.uda files to other formats.
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