System and method for correlating photoreceptor pigmented film layer to electrical performance
AssigneeXerox Corporation
InventorsDante M. Pietrantoni, Kamran U. Zaman, Jonathan H. Herko, Scott J. Griffin, Michael S. Roetker
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Abstract
The presently disclosed embodiments are directed to a system and method for obtaining spectra of highly scattering pigmented layers and providing a spectral reflection ratio, which can be correlated to photoreceptor electrical performance. The present embodiments employ the use of dark field microscopy in combination with a noise reducing normalization technique to provide real-time production adjustments to optimize photoreceptor characteristics and/or performance.
Claims21
A system for providing correlates of a xerographic imaging member layer relative thickness, comprising:
- a reflected light microscope, comprising a light source and a dark field objective for applying a light beam to a pigmented xerographic imaging layer, wherein a reflected beam is produced;
- a beam splitter and fiber optic cable for transporting the reflected beam to a spectrometer;
- a spectrometer for obtaining a spectrum of the pigmented xerographic imaging layer positioned on a top portion of a xerographic imaging member and defining the spectrum associated with the pigmented xerographic imaging layer, wherein the spectrum is normalized such that a base spectrum is subtracted from a composite spectrum of the xerographic imaging member to define the spectral response associated with the topmost pigmented xerographic imaging layer;
- and
- circuitry for correlating imaging member characteristics with the measurements obtained from the spectrometer and microscope, wherein such correlating information is used to adjust xerographic imaging layer production or monitor xerographic imaging layer wear.
A method for providing measurement of xerographic imaging member relative layer thickness, comprising:
- measuring a spectra value of a pigmented xerographic imaging layer positioned on a top portion of a multi-layer xerographic imaging member, wherein the spectra value is normalized such that a base spectra value is subtracted from an overall spectra value of the multi-layer xerographic imaging member to define the spectra value associated with the pigmented xerographic imaging layer;
- measuring the pigmented xerographic imaging layer to determine pigment spectral characteristic of pigment deposited in the pigmented xerographic imaging layer;
- correlating xerographic imaging member characteristics with the measurements obtained, wherein such correlating information is used to determine the measurements that produce optimal xerographic imaging member electrical characteristics;
- and
- using the correlating information to adjust xerographic imaging layer production or monitor xerographic imaging layer wear.
A method for providing measurement and adjustment of xerographic imaging member relative layer thickness, comprising:
- measuring a spectra value of a pigmented xerographic imaging layer positioned on a top portion of a xerographic imaging member, wherein the spectra value is normalized such that a base spectra value is subtracted from an overall spectra value of the xerographic imaging member to define the spectra value associated with the pigmented xerographic imaging layer;
- measuring the pigmented xerographic imaging layer to determine pigment spectral characteristic of pigment deposited in the pigmented xerographic imaging layer;
- correlating xerographic imaging member characteristics with the measurements obtained, wherein such correlating information is used to determine the measurements that produce optimal xerographic imaging member characteristics;
- and
- using the correlating information to adjust xerographic imaging layer production or monitor xerographic imaging layer wear, wherein algorithms based on smoothing and absorbance ratios calculated from the measurements obtained are used for correlating the xerographic imaging member characteristics with the measurements.
Dependencies are inferred from the claim text.