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AssigneeEastman Kodak Company
InventorsKurt M. Sanger, Thomas A. Mackin, Michael E. Schultz
Estimating the term…
A method and apparatus are disclosed for the calibration of a multichannel printer. The printer comprises a plurality of diode lasers which are modulated in accordance with an information signal. Radiation from the diode lasers is imaged onto a receiving medium such as a thermal print medium. The thermal print medium is supported on a drum which is rotatable about an axis. In order to balance the output from the diode lasers, test patterns are formed on the receiving medium with each of the lasers using known power inputs. The density of each of the test patterns is measured, and the density values obtained are correlated with the input power levels for each of the lasers. The measurement of densities produced by a single laser is facilitated by slowing the print head down by a factor of the number of lines normally printed and writing with one line source at a time.
A method of printing test patterns with a multichannel printer, said printer having a plurality of "n" of light sources which are projected onto a receiving medium responsive to radiation wherein "n" is an integer, said receiving medium being supported on a rotatable drum and said light sources being mounted on a translator which is driven axially of the drum, said method comprising the steps of:
Apparatus for printing test patterns with a multichannel printer, said printer having a print head which includes means for imaging radiation from a plurality of "n" of lasers onto a receiving medium which is responsive to radiation wherein "n" is an integer, said apparatus comprising:
Dependencies are inferred from the claim text.