Optical Fabrication, Industrial Design, 3D Printing, Mechanical Engineering, Prototyping.
You can get promising results using affordable 3D printers such as fused deposition modeling (FDM) and stereolithography (SLA). But a downside is that you can only make your lens as big as the printing bed allows. For example, if you are using an affordable SLA, it won’t be very big (up to 145 x