Its worth mentioning that blu ray players and burners work at 150nm https://en.wikipedia.org/wiki/Comparison_of_high-definition_optical_disc_formats#/media/File

Its worth mentioning that blu ray players and burners work at 150nm https://en.wikipedia.org/wiki/Comparison_of_high-definition_optical_disc_formats#/media/File:Comparison_CD_DVD_HDDVD_BD.svg https://en.wikipedia.org/wiki/Comparison_of_high-definition_... There is a paper from 10 years ago where someone used one for making 450nm lithography https://www.semanticscholar.org/paper/High-resolution%2C-low-cost-laser-lithography-using-a-Rothenbach-Gupta/4daf4b2b878204f9cfc2126cda0966655b000c63 https://www.semanticscholar.org/paper/High-resolution%2C-low...