A thermal recording device scans a laser beam over a thermosensitive recording medium which comprises a support coated with a coloring agent, a color developer, and a light absorbing dye and produces a color having a density commensurate with the lever of a thermal energy applied thereto, thereby to...http://www.google.de/patents/US5668589?utm_source=gb-gplus-sharePatent US5668589 - Thermal recording device with controller for correcting laser beam intensity
