Systems and methods for improving calibration of a linear array sensor

A method for gray level calibration of a linear array sensor using monitored reflectivity of a belt, the belt having a length and moving in a process direction along the length, the method comprising:

• determining a first set of calibration parameters when the belt is at a first process direction position, the first set of calibration parameters associated with calibrating the linear array sensor in a cross process direction when the belt is at the first process direction position, the cross process direction perpendicular to the process direction;
• determining a second set of calibration parameters when the belt is at a second process direction position, the second set of calibration parameters associated with calibrating the linear array sensor in the cross process direction when the belt is at the second process direction position;
• and
• storing the first and second sets of calibration parameters.

A machine-readable medium that provides instructions for gray level calibration of a linear array sensor using monitored reflectivity of a drum, the drum having an axis and rotating about the axis, the instructions, when executed by a processor, causing the processor to perform operations comprising:

• determining a first set of calibration parameters when the drum is at a first rotation angle about the axis, the first set of calibration parameters associated with calibrating the linear array sensor in a direction along the axis when the drum is at the first rotation angle about the axis;
• determining a second set of calibration parameters when the drum is at a second rotation angle about the axis, the second set of calibration parameters associated with calibrating the linear array sensor in the direction along the axis when the drum is at the second rotation angle about the axis;
• and
• storing the first and second sets of calibration parameters.

A machine-readable medium that provides instructions for gray level calibration of a linear array sensor using monitored reflectivity of a belt, the belt having a length and moving in a process direction along the length, the instructions, when executed by a processor, causing the processor to perform operations comprising:

• determining a first set of calibration parameters when the belt is at a first process direction position, the first set of calibration parameters associated with calibrating the linear array sensor in a cross process direction when the belt is at the first process direction position, the cross process direction perpendicular to the process direction;
• determining a second set of calibration parameters when the belt is at a second process direction position, the second set of calibration parameters associated with calibrating the linear array sensor in the cross process direction when the belt is at the second process direction position;
• and
• storing the first and second sets of calibration parameters.

A system for gray level calibration of a linear array sensor using monitored reflectivity of a drum, the drum having an axis and rotating about the axis, the system comprising:

• a memory;
• a drum signature calibrating circuit, routine or application that determines a first set of calibration parameters when the drum is at a first rotation angle about the axis and a second set of calibration parameters when the drum is at a second rotation angle about the axis, the first set of calibration parameters associated with calibrating the linear array sensor in a direction along the axis when the drum is at the first rotation angle about the axis, the second set of calibration parameters associated with calibrating the linear array sensor in the direction along the axis when the drum is at the second rotation angle about the axis;
• and
• a controller that stores the first and second sets of calibration parameters in the memory.

A system for gray level calibration of a linear array sensor using monitored reflectivity of a belt, the belt having a length and moving in a process direction along the length, the system comprising:

• a memory;
• a drum signature calibrating circuit, routine or application that determines a first set of calibration parameters when the belt is at a first process direction position and a second set of calibration parameters when the belt is at a second process direction position, the first set of calibration parameters associated with calibrating the linear array sensor in a cross process direction when the belt is at the first process direction position, the cross process direction perpendicular to the process direction, the second set of calibration parameters associated with calibrating the linear array sensor in the cross process direction when the belt is at the second process direction position;
• and
• a controller that stores the first and second sets of calibration parameters.