It’s not surprising that some people grow up and still use LEGO in their projects, like [Steve] who has used LEGO to build an optics lab with a laser beam splitter. [Steve] started this project ...

The laser beam is expanded 5 times to a diameter of 15 mm before ... a 1/2 λ wave plate is placed after the beam expander and coupled with a cubic polarization beam splitter in the receiver path. The ...