One of the Blu-ray models was a hackaday winner a few years back. You can see the log of their efforts and a handful of sub-micron images here: https://hackada

One of the Blu-ray models was a hackaday winner a few years back. You can see the log of their efforts and a handful of sub-micron images here: https://hackaday.io/project/9205/logs https://hackaday.io/project/9205/logs