# Polarimeter

The tactile interface for a PQN Node is a polarimeter setup that lets users observe and interact with the polarisation of light, a direct demonstration of quantum superposition.

Lab-grade polarimeter systems cost several hundred to several thousand dollars, creating a significant barrier to public engagement. To address this, the PQN provides an inexpensive, modular alternative built from **3D-printed components and affordable optics** that replicates the same visual effects at a fraction of the cost.

The design files (STL and CAD) are available in the [PQN hardware repository](https://github.com/PublicQuantumNetwork/hardware) so Nodes can print the parts directly or adapt the dimensions to their needs.

```{toctree}
:maxdepth: 2

components
assembly
```