Helium-neon laser: thermal high-resolution recording.

@article{Carlson1966HeliumneonLT,
  title={Helium-neon laser: thermal high-resolution recording.},
  author={C O Carlson and Elizabeth Stone and Henry L. Bernstein and W K Tomita and W C Myers},
  journal={Science},
  year={1966},
  volume={154 3756},
  pages={1550-1}
}
Scan-line recording by means of a moving laser spot has been achieved on metallic and organic thin films Recording rates of the order of one million spots per second were obtained with a laser beam power of 38 milliwatts at the recording surface. Typical recorded line widths were of the order of 2 microns.