Systems and methods for increasing or optimizing the optical...

Details Systems and methods for increasing or optimizing the optical... Systems and methods for increasing or optimizing the optical...

2008-07-10

2011-12-13

Owens, Douglas W (Department: 2821)

Incremental printing of symbolic information

Ink jet

Controller

C347S232000

Reexamination Certificate

active

08075084

ABSTRACT:
Methods and systems are provided to increase or optimize the illumination used with a sensor to measure printed ink colors on a substrate at high speed (up to 3 m/s) and high resolution. By modifying the number of light sources, their wavelengths and/or their relative intensities, the optical contrast can be increased or optimized to yield a higher signal-to-noise ratio and improved accuracy for the measurement of multiple colors. In one implementation, multiple LEDs with selected output peak wavelength may be used to achieve higher contrast imaging for each color.

REFERENCES:
patent: 6178007 (2001-01-01), Harrington
patent: 6975949 (2005-12-01), Mestha et al.
patent: 7259857 (2007-08-01), Butterfield et al.
patent: 7271935 (2007-09-01), Coons et al.
patent: 7388688 (2008-06-01), Yamazaki et al.

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