Computational photography[1] is getting really, really cheap. You can do things with arrays of cameras, like see through shrubbery.[2] Add in cheap controlled

Computational photography[1] is getting really, really cheap. You can do things with arrays of cameras, like see through shrubbery.[2] Add in cheap controlled motion (think $200 CNC engraver machines) and you can build a comparator[3] to do precision measurements that used to require expensive machines. [1] https://graphics.stanford.edu/projects/array/ https://graphics.stanford.edu/projects/array/ [2] https://graphics.stanford.edu/projects/array/videos/crowd0-sap.mpg https://graphics.stanford.edu/projects/array/videos/crowd0-s... [3] https://www.instructables.com/Comparatron-an-Affordable-Digital-Optical-Comparat/ https://www.instructables.com/Comparatron-an-Affordable-Digi...