Patents by Inventor Joseph E. Davis

Joseph E. Davis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110028926
    Abstract: A diaper rash prevention apparatus includes a single layer enclosure with a flangeless aperture adapted for being placed in direct contact with the skin surrounding the anus for the purpose of directing fecal matter into the single layer enclosure. An adhesive may be disposed about the flangeless aperture to maintain the aperture in direct contact with the skin surrounding the anus. A cover may be releasably coupled over at least one of the flangeless aperture and the adhesive. An applicator may be used to assist in the installation of the single layer enclosure.
    Type: Application
    Filed: October 14, 2010
    Publication date: February 3, 2011
    Inventor: Joseph E. Davis
  • Patent number: 7756368
    Abstract: Switching optical signals containing a plurality of spectral channels characterized by a predetermined channel spacing is described. A selected beam deflector array may be selected from among a plurality of available beam deflector arrays configured to accommodate spectral channels of different channel spacings. The selected beam deflector array is configured to accommodate spectral channels of the predetermined channel spacing. The spectral channels are selectively optically coupled to the selected beam deflector array, which selectively optically couples the spectral channels between one or more input ports and one or more output ports.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: July 13, 2010
    Assignee: Capella Photonics, Inc.
    Inventors: Mark H. Garrett, Joseph E. Davis
  • Patent number: 7539371
    Abstract: A micromirror for use in an optical apparatus may comprise a reflective portion, configured to be rotatable about a switching axis and an attenuation axis that is different from the switching axis. The reflective portion may include an edge that is substantially parallel to the attenuation axis. The edge may include one or more edge features that protrude above a plane of the micromirror surface and/or are submerged below the plane of the micromirror surface, and/or have an edge shape that deviates from a straight line. Alternatively, an array of micromirrors may have mirrors characterized by sawtooth features disposed along edges that are substantially parallel to the attenuation axis.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: May 26, 2009
    Assignee: Capella Photonics, Inc.
    Inventors: Massimo Martinelli, Long Yang, Mark H. Garrett, Robert Ostrom, Joseph E. Davis
  • Publication number: 20090028503
    Abstract: Switching optical signals containing a plurality of spectral channels characterized by a predetermined channel spacing is described. A selected beam deflector array may be selected from among a plurality of available beam deflector arrays configured to accommodate spectral channels of different channel spacings. The selected beam deflector array is configured to accommodate spectral channels of the predetermined channel spacing. The spectral channels are selectively optically coupled to the selected beam deflector array, which selectively optically couples the spectral channels between one or more input ports and one or more output ports.
    Type: Application
    Filed: August 16, 2007
    Publication date: January 29, 2009
    Applicant: Capella Photonics, Inc.
    Inventors: Mark H. Garrett, Joseph E. Davis
  • Publication number: 20080266637
    Abstract: A micromirror for use in an optical apparatus may comprise a reflective portion, configured to be rotatable about a switching axis and an attenuation axis that is different from the switching axis. The reflective portion may include an edge that is substantially parallel to the attenuation axis. The edge may include one or more edge features that protrude above a plane of the micromirror surface and/or are submerged below the plane of the micromirror surface, and/or have an edge shape that deviates from a straight line. Alternatively, an array of micromirrors may have mirrors characterized by sawtooth features disposed along edges that are substantially parallel to the attenuation axis.
    Type: Application
    Filed: April 21, 2008
    Publication date: October 30, 2008
    Applicant: Capella Photonics, Inc.
    Inventors: Massimo Martinelli, Long Yang, Mark H. Garrett, Robert Ostrom, Joseph E. Davis
  • Patent number: 7362930
    Abstract: Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by using rotation of the micromirror about both the attenuation axis and the switching axis to achieve the desired level of attenuation. Peak coupling can be attained by dithering the micromirror about a dither axis that is tangent to a contour of constant attenuation using simultaneous rotation about the switching and attenuation axes. A power level of a spectral channel may be attenuated by rotating the channel micromirror with respect to an effective attenuation axis that is non-orthogonal to the dither axis through a combination of rotations about the switching axis and the attenuation axis.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 22, 2008
    Assignee: Capella Photonics
    Inventors: Joseph E. Davis, Brian P. Tremaine
  • Patent number: 7352927
    Abstract: Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by appropriate modification of the edges of the micromirrors, by modification of the input and/or output ports to allow for attenuation by rotation of the micromirror about the switching axis, by using rotation of the micromirror about both the attenuation axis and the switching axis to achieve the desired level of attenuation, by inserting an aperture at a focal plane or external to the device to reduce the magnitude of the micromirror edge diffraction transmitted to any or all output ports, or by appropriate filtering of angular frequencies with a diffraction grating used to separate a multi-channel optical signal into constituent spectral beams.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: April 1, 2008
    Assignee: Capella Photonics
    Inventors: Joseph E. Davis, Mark H. Garrett
  • Patent number: 7346234
    Abstract: Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by using rotation of the micromirror about both the attenuation axis and the switching axis to achieve the desired level of attenuation. Peak coupling can be attained by dithering the micromirror about an axis tangent to a contour of constant attenuation using simultaneous rotation about the switching and attenuation axes.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: March 18, 2008
    Assignee: Capella Photonics
    Inventors: Joseph E. Davis, Brian P. Tremaine
  • Patent number: 7263253
    Abstract: A wavelength selective switch architecture for ROADMs for switching the spectral channels of a multi-channel, multi-wavelength optical signal between input and output ports employs a biaxial MEMS port mirror array for optimal coupling efficiency and ITU grid alignment, an anamorphic beam expander for expanding input optical signals to create an elongated beam profile, a diffraction grating for spatially separating the spectral channels, an anamorphic focusing lens system, an array of biaxial elongated channel MEMS micromirrors, a built-in Optical Channel Monitor, and an electronic feedback control system. The bi-axial channel micromirrors are rotatable about one axis to switch spectral channels between ports, and are rotatable about an orthogonal axis to vary the coupling of the spectral channel to an output port and control attenuation of the spectral signal for complete blocking or for a predetermined power level.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 28, 2007
    Assignee: Capella Photonics, Inc.
    Inventors: Joseph E. Davis, Mark H. Garrett, Brian Tremaine, Michael Darling
  • Patent number: 7209274
    Abstract: A method and apparatus for fabricating a MEMS apparatus having a device layer with an optical surface that is supported by a pedestal on a planar support layer that is suspended for movement with respect to a base support by hinge elements disposed in a different plane from the planar support layer. The surface area of the optical surface is maximized with respect to the base support to optimized the fill factor of the optical surface and afford a high passband. The height of the pedestal is selected to position the device layer sufficiently above the base support to afford an unobstructed predetermined angular rotation about each axis. The hinges may be made of thin-film material, fabricated by way of surface micromachining techniques. The hinges are disposed underneath the device layer enabling the optical surface to be maximized so that the entire surface becomes usable (e.g., for optical beam manipulation). MEMS devices afford an array of MEMS mirrors with a high optical fill factor and high passband.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: April 24, 2007
    Assignee: Capella Photonics, Inc.
    Inventors: Bert P. Van Drieenhuizen, Joseph E. Davis
  • Patent number: 6909819
    Abstract: A system and method for canceling disturbance in a MEMS device. The system 200 includes a MEMS device 203, which may include a substrate 205 and a plurality of individually movable MEMS elements 203-1 through 203-N, and a control assembly 207. The optical system 200 may be utilized in and/or form a portion of any optical apparatus employing an array of MEMS devices. The control assembly 207 uses feed-forward control signals to cancel disturbance in the MEMS device 203, and more particularly, to cancel disturbance in the non-switched or static mirrors of the MEMS device 203 caused by switched or moving mirrors.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 21, 2005
    Assignee: Capella Photonics, Inc.
    Inventors: Brian P. Tremaine, Joseph E. Davis
  • Patent number: 6879750
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: April 12, 2005
    Assignee: Capella Photonics, Inc.
    Inventors: Tai Chen, Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE39331
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: October 10, 2006
    Assignee: Capella Photonics, Inc.
    Inventors: Tai Chen, Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE39397
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral characters, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: November 14, 2006
    Assignee: Capella Photonics, Inc.
    Inventors: Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE39411
    Abstract: The invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into multiple output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: November 28, 2006
    Assignee: Capella Photonics, Inc.
    Inventors: Karl A. Belser, Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE39515
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the invention may further employ a polarization diversity scheme, whereby polarization-sensitive effects become inconsequential and insertion loss is minimized. The WSR apparatus of the invention may additionally be equipped with servo-control and channel equalization capabilities.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: March 13, 2007
    Assignee: Capella Photonics, Inc.
    Inventors: Mark H. Garrett, Masud Mansuripur, Jeffrey P. Wilde, Pavel G. Polynkin, Joseph E. Davis
  • Patent number: RE39525
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports, thereby constituting a dynamic optical drop module (RODM). By operating an RODM in reverse, a dynamic optical add module (ROAM) is also provided. The RODM (or ROAM) of the present invention may be further equipped with servo-control and power-management capabilities.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: March 20, 2007
    Assignee: Capella Photonics, Inc.
    Inventors: Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE42368
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: May 17, 2011
    Assignee: Capella Photonics, Inc.
    Inventors: Tai Chen, Jeffrey P. Wilde, Joseph E. Davis
  • Patent number: RE42521
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral channels, which are focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the invention may further employ a polarization diversity scheme, whereby polarization-sensitive effects become inconsequential and insertion loss is minimized. The WSR apparatus of the invention may additionally be equipped with servo-control and channel equalization capabilities.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: July 5, 2011
    Assignee: Capella Photonics, Inc.
    Inventors: Mark H. Garrett, Masud Mansuripur, Jeffrey P. Wilde, Pavel G. Polynkin, Joseph E. Davis
  • Patent number: RE42678
    Abstract: This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral characters, which are then focused onto an array of corresponding channel micromirrors. The channel micromirrors are individually controllable and continuously pivotable to reflect the spectral channels into selected output ports. As such, the inventive WSR apparatus is capable of routing the spectral channels on a channel-by-channel basis and coupling any spectral channel into any one of the output ports. The WSR apparatus of the present invention may be further equipped with servo-control and spectral power-management capabilities, thereby maintaining the coupling efficiencies of the spectral channels into the output ports at desired values.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: September 6, 2011
    Assignee: Capella Photonics, Inc.
    Inventors: Jeffrey P. Wilde, Joseph E. Davis