I made a wire grid for polarizing microwave-frequency light. The wires are 0.0014″ = 0.036mm in diameter, spaced 0.0044″ = 0.112mm apart. There are about 1400 wires stretched across the diameter of this ring. The brown crud is flux from soldering the wires into the middle of the ring sandwich. #thingsimadeforwork

 

Polarizing Grid, Round

Polarizing Grid, Round