Demo – Optical Pick-up Unit – Lightpen by Bram · Published 2023-11-26 · Updated 2024-01-28 Lichtpen / Lightpen OPTO-Electronic Focusing-Error Detection Device https://www.bramjacobse.nl/wordpress/wp-content/uploads/2022/08/1982_pinkeltje.mp4 Optical pick-up in the Hand
