OptiCore is a Blender-addon to provide accurate and well-defined models of optical elements (lenses, mirrors, etc.) as well as a few selected optimechanical components (optical bench, posts). These ...
Feel free to ask any question in the forum thread. To make the Optics Design Workbench available in FreeCAD, install it using FreeCAD's built in addon manager. If you want to install without the addon ...