That's interesting. Big Clive explored a set of inexpensive calipers that seemed to work on an interference pattern but sensed with two PCBs passing over each o

That's interesting. Big Clive explored a set of inexpensive calipers that seemed to work on an interference pattern but sensed with two PCBs passing over each other. He mentions in his theory of operation moire pattern measuring devices. It's a fascinating device. https://youtu.be/fKSSY1gzCEs https://youtu.be/fKSSY1gzCEs