A method and apparatus for calibrating a grey level LED printhead or the like to control uniformity of light emissions with a desired criterion such as 2% recording error. A set of possible exposure times is established and from this set a subset of exposure times is assigned to each LED for use in recording...http://www.google.fr/patents/US5200765?utm_source=gb-gplus-shareBrevet US5200765 - Apparatus and method for calibrating a grey level printhead
Apparatus and method for calibrating a grey level printhead
