Facsimile and static presentation processing – Natural color facsimile – Measuring – testing – and calibrating
Reexamination Certificate
2006-09-26
2009-11-24
Nguyen, Madeleine A (Department: 2625)
Facsimile and static presentation processing
Natural color facsimile
Measuring, testing, and calibrating
C358S001900, C702S085000, C382S167000
Reexamination Certificate
active
07623278
ABSTRACT:
A Micro-Electro-Mechanical System (MEMS) based Fabry-Perot array may be used as a spectral filter to light sensing array, such as a CCD or CMOS photodetector. Applying different voltages to the electrodes of individual Fabry-Perot cells within the array allows a gradient in the Fabry-Perot air gap across the Fabry-Perot array. In this manner the MEMS Fabry-Perot array serves as a spectral filter of light passing through the Fabry-Perot array to the photodetector array. Embodiments of the disclosed sensor, used with LEDs that emit light outside the photosensitivity range of a photoreceptor belt, may be used to measure spectral information from toned patches placed upon a photoreceptor belt within a marking system. Other embodiments of the disclosed sensor, used with LEDs that emit light of any wavelength, may be used to measure spectral information from toned patches placed by a marking system upon a non-photosensitive output substrate, such as an intermediate belt or paper.
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Gulvin Peter M.
Lin Pinyen
Mestha Lalit K.
Wang Yao Rong
Nguyen Madeleine A
Oliff & Berridg,e PLC
Xerox Corporation
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