This project is having some problems getting its finished product out of China because of Covid-19, but it is worth looking into.
https://www.kickstarter.com/projects/laserknifeedgereader/laser-knife-edge-reader-for-better-knife-sharpening?ref=nav_search&result=project&term=knife%20angle
For reference see https://forum.tormek.com/index.php?topic=3104.0
https://www.kickstarter.com/projects/laserknifeedgereader/laser-knife-edge-reader-for-better-knife-sharpening?ref=nav_search&result=project&term=knife%20angle
For reference see https://forum.tormek.com/index.php?topic=3104.0