Patent ID: 6043835
Filing Date: 2000-03-28
Classification: B41J

Abstract:
A raster output scanner comprising:a replaceable laser diode for receiving a current and emitting a light beam;a medium;a scanning means for scanning the light beam on said medium to create an exposure level on said medium;an electronic circuit board for controlling said current of said laser diode;means for measuring at least one exposure level of said light beam on said medium;said measuring means being in electrical communication with said electronic circuit board;a replaceable microchip containing characteristics information of said respective laser diode;said microchip being in electrical communication with said electronic circuit board;storage means for storing different current values to be applied to said laser diode;said storage means being in electrical communication with said electronic circuit board; andsaid electronic circuit board being so constructed and arranged that once said laser diode and said respective microchip are replaced, said electronic circuit board being responsive to said measuring means and said microchip for receiving the at least one measured exposure level of the light beam from said replaced laser diode and the characteristics information of said replaced laser diode to generate a new set of current values and store them in said storage means.