VTK Export for Acrobat is a Visualization Toolkit VTK file export plug-in for Acrobat®. This plug-in gives Acrobat the ability to export objects from 3D PDF file in Acrobat to 3D polygon mesh objects in a Visualization Toolkit VTK file.
VTK Export for Acrobat tessellates objects in a 3D PDF into a set of triangular meshes. These meshes are then exported to a VTK file as mesh objects. The VTK file can then be imported into a variety of CAD applications.
VTK Export for Acrobat is very easy to use. Once installed, it automatically loads itself into Acrobat and adds a new menu called "VTKExport" to the Acrobat menu containing these newly added commands.
The 'VTKExport' submenu consists of the following commands:
Export - Exports a VTK file
Help - Displays the VTK Export for Acrobat help file
Register - Registers your copy of VTK Export for Acrobat
About - Displays the VTK Export for Acrobat About box

The VTK File Format
The Visualization ToolKit (VTK) is an open source, freely available software system for 3D computer graphics, image processing, and visualization used by thousands of researchers and developers around the world. VTK consists of a C++ class library, and several interpreted interface layers including Tcl/Tk, Java, and Python. The Toolkit stores geometric data in a file format known as VTK. Very few CAD applications have the ability to read and write VTK files.