Edmund Optics makes the STP file available free for download. You will want a high fidelity STP to STL conversion for a smooth curvature surface so a free online converter may not be sufficient. ThorLabs lists the dimensions if you want to draw your own in your preferred CAD program and export the STL directly. How did your project go? I haven’t ordered clear resin yet but would be good to know for future reference how well the light diffusion was for your project.
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