Patent application number | Description | Published |
20090065478 | MEASURING ETCHING RATES USING LOW COHERENCE INTERFEROMETRY - Measuring thickness and the rate of change of thickness of a material having a surface while the material is being etched, comprising: illuminating the material with low coherence light, a portion of the which transmits through the material and a portion of which is reflected; etching the material surface and while etching, collecting a portion of the reflected light from each optical interface of the material with a low coherence light interferometer; calculating the thickness and rate of change of thickness of the material or part of the material according to the obtained interferometric data; and storing or displaying the resultant thickness and rate of change of thickness of the material. The present invention provides a unique way of calculating the thermo optic coefficient of a material. This method can be used simultaneously with etching the material so that changes to the etching rate can be made in real time. | 03-12-2009 |
20090079783 | MEMS PRINTHEAD BASED COMPRESSED FLUID PRINTING SYSTEM - A method and apparatus for delivering a mixture of compressed fluid and marking material and depositing the marking material in a pattern onto a substrate, includes a high pressure source of a mixture of compressed fluid and marking material. A micro-machined manifold includes a plurality of micro-nozzles, a fluid chamber, and an entrance port with portions of a first surface of the micro-machined manifold defining the entrance port with the entrance port being connected in fluid communication with the fluid chamber. Each of the micro-nozzles having an inlet and an outlet with the inlet being connected in fluid communication with the fluid chamber and the outlet being located on the second surface of the micro-machined manifold. Each micro-nozzle is shaped to produce a directed beam of the mixture of compressed fluid and marking material beyond the outlet of the micro-nozzle. A housing is connected in fluid communication with the high pressure source and the entrance port of the micro-machined manifold with the connection being a sealed connection. Optionally, a device operable to capture marking material that does not adhere to the substrate can be included. | 03-26-2009 |
20090147220 | DISPLAY APPARATUS USING BILINEAR ELECTROMECHANICAL MODULATOR - A digital projection apparatus has a first light modulation subsystem with a first light source producing linear illumination of a first spectral color and a second light source producing linear illumination of a second spectral color. A first light modulator chip ( | 06-11-2009 |
20090231697 | STEREOSCOPIC DISPLAY USING MULTI-LINEAR ELECTROMECHANICAL MODULATOR - A method for forming a stereoscopic image having a left-eye image and a right-eye image repeats the steps of directing a line of the left-eye image as incident light toward a scanning element while directing a line of the right-eye image as incident light toward the scanning element, and moving the scanning element into position for directing incident light toward a portion of a display surface. | 09-17-2009 |
20090274998 | OPTICAL DETECTION OF DENTAL CARIES - A method for caries detection uses an image capture device ( | 11-05-2009 |
20090278918 | DISPLAY USING BIDIRECTIONALLY SCANNED LINEAR MODULATOR - A method for forming a stereoscopic image forms separate left-eye and right-eye images in a repeated cycle that forms the left-eye image by providing data for lines of the left-eye image, ordered in sequence from a first to a second edge of an image frame, then forms successive lines of modulated light according to the ordered sequence by progressively scanning lines of modulated light across a display surface by rotating a scanning element forward from a first to a second position. The right-eye image is formed by providing data for lines of the right-eye image, ordered in sequence from the second to the first edge of the image frame and forming successive lines of modulated light, progressively scanning the lines of modulated light across the display surface by rotating the scanning element in reverse from the second to the first position. The left-eye image is distinguished from the right-eye image. | 11-12-2009 |
20100165089 | APPARATUS FOR CARIES DETECTION - An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter ( | 07-01-2010 |
20100171931 | LINE ILLUMINATION APPARATUS USING LASER ARRAYS - An illumination apparatus forms, onto a linear array light modulator, a line of illumination that extends in a linear direction. The illumination apparatus has a first laser array with laser emitters for forming a first linear beam array and a second laser array with laser emitters for forming a second linear beam array. An array combiner aligns at least the first and second linear beam arrays in the linear direction and directs the first and second linear beam arrays along a propagation path to form a mixed illumination. At least first and second cylindrical lens elements having power in the linear direction relay the mixed illumination from the propagation path toward the linear array light modulator. At least third and fourth cylindrical lens elements having power in the cross-array direction that is orthogonal to the linear direction focus the mixed illumination onto the linear array light modulator. | 07-08-2010 |
20100177171 | DUAL-VIEW STEREOSCOPIC DISPLAY USING LINEAR MODULATOR ARRAYS - A method for displaying first and second stereoscopic images to first and second viewers provides the first viewer with a first decoding device having a first viewer differentiating element for receiving the first stereoscopic image and further having a first left- and right-eye differentiating elements for separating left- and right-eye images. The second viewer is provided with a second decoding device having a second viewer differentiating element for receiving the second stereoscopic image and further having a second left- and right-eye differentiating element. The first stereoscopic image is displayed to the first viewer by forming a first left-eye image and forming a first right-eye image, each over substantially half of the refresh period. The second stereoscopic image is displayed to the second viewer by forming a second left-eye image and forming a second right-eye image, each over substantially half of the refresh period. | 07-15-2010 |
20100177929 | ENHANCED SAFETY DURING LASER PROJECTION - The present invention is directed to systems and methods that provide enhanced eye safety for image projection systems. In particular, the instant invention provides enhanced eye safety for long throw laser projection systems. | 07-15-2010 |
20100315595 | DYNAMIC ILLUMINATION CONTROL FOR LASER PROJECTION DISPLAY - A display apparatus ( | 12-16-2010 |
20110073188 | MICROVALVE FOR CONTROL OF COMPRESSED FLUIDS - A compressed fluid microvalve for controlling flow of compressed fluid from a region of high pressure to a region of low pressure is provided. A chamber includes an inlet port, a region of high pressure, and an outlet port leading to a region of low pressure. A cantilever beam includes a first portion, a second portion, and a third portion. The cantilever beam is anchored to a portion of the chamber and is suspended in the chamber such that the first portion and third portion of the cantilever beam are exposed to the region of high pressure on all sides. The second portion of the cantilever beam overlaps the outlet port. The cantilever beam includes a first position in contact with the outlet port to prevent fluid flow from the chamber through the outlet port and a second position removed from contact with the outlet port to permit fluid flow from the chamber through the outlet port. A controller is in electrical communication with the cantilever beam and is configured to provide an actuation pulse to the cantilever beam to move the cantilever beam from the first position in contact with the outlet port to the second position removed from contact with the outlet port. | 03-31-2011 |
20110073788 | MICROVALVE FOR CONTROL OF COMPRESSED FLUIDS - A micro-electromechanical device for controlling compressed fluid flow is provided. A chamber includes a fluid flow inlet port, a high pressure region exceeding 30 bar, and a fluid flow outlet port. A moveable micro-electromechanical valve is positioned to contact the fluid flow outlet port when the moveable micro-electromechanical valve is in a first position. An electrical connection to the moveable micro-electromechanical valve provides an electrical pulse train to the moveable micro-electromechanical valve to actuate the valve at a rate of 10 KHz or more to move the valve in order to control fluid communication between the high pressure region and a low pressure region downstream from the fluid flow outlet port. | 03-31-2011 |
20110074904 | METHOD FOR CONTROLLING PEEL POSITION IN A PRINTER - A method for maintaining a peel location and for peeling a layer of media from a surface in a thermal printer. An optical probe, that includes a light source and a photodetector, transmits light from the optical probe toward a first web. The web reflects a portion of the transmitted light onto the photodetector, which then outputs an electrical signal which is compared with a preselected signal level and the difference between them provides an indication as to how much adjustment the peel location requires. Adjusting the peel location may comprise changing environmental characteristics of the first web or the second web (surface) or adjusting a tension of the first or second web. The difference between the measured electrical signal levels is related to a physical distance of the first web from the desired peel location. | 03-31-2011 |
20110074905 | APPARATUS FOR CONTROLLING PEEL POSITION IN A PRINTER - An electromechanical system and a printer for maintaining a peel location of media impressed on a receiving substrate. A mounted optical probe has at least one light source and one or more photodetectors for detecting reflected portions of the light emitted or transmitted from the light source. The photodetector indicates to the system controller a distance of the media for controlling a peel location via an electrical signal. A comparator compares the electrical signal with a predetermined electrical signal reference to determine if the media is desirably positioned. The predetermined electrical reference signal corresponds to the desired peel location. The comparator compares the signal levels and outputs a correction signal used in a negative feedback loop for adjusting a velocity of a motor that drives a take-up roller for the media. | 03-31-2011 |
20110134344 | DYNAMIC ILLUMINATION CONTROL FOR LASER PROJECTION DISPLAY - A method for improving image contrast for a display apparatus obtains a frame of image data having one or more code values for each pixel in the frame of image data, analyzes the frame of image data to identify a distribution of dark regions therein. The method further adjusts at least one of the one or more code values for the frame of image data according to the distribution of dark regions in the frame of image data and attenuates a brightness level available for the image frame according to the distribution of dark regions in the frame of image data. | 06-09-2011 |
20110310303 | PROJECTION APPARATUS PROVIDING REDUCED SPECKLE ARTIFACTS - A projection apparatus for producing color images having reduced speckle artifacts comprising: at least three narrow band light sources having first, second and third visible wavelength bands; a digital image source providing color digital image data; at least one spatial light modulator for forming a color image using light responsive to the color digital image data; a projection display surface including a reflective layer that reflects incident illumination in the first, second, and third wavelength bands; and a fluorescent agent that absorbs a fraction of the incident light in the first visible wavelength bands and emits light in a corresponding first emissive visible wavelength band; and a projection lens that projects the color image onto the projection display surface; wherein return light from the projection display surface contains light in both the first incident visible wavelength band and the first emissive visible wavelength band, thereby reducing speckle artifacts. | 12-22-2011 |
20110310478 | PROJECTION DISPLAY SURFACE PROVIDING SPECKLE REDUCTION - A projection display surface for reducing speckle artifacts from a projector having at least one narrow band light source having an incident visible wavelength band, wherein the incident visible wavelength band has an incident peak wavelength and an incident bandwidth, comprising: a substrate having a reflective layer that reflects incident light over at least the incident visible wavelength band; and a fluorescent agent distributed over the reflective layer, wherein the fluorescent agent absorbs a fraction of the light in the incident visible wavelength band and emits light in an emissive visible wavelength band having an emissive peak wavelength and an emissive bandwidth; wherein return light from the projection display surface produced when incident light in the incident visible wavelength band is incident on the projection display surface contains light in both the incident visible wavelength band and emissive visible wavelength band, thereby reducing speckle artifacts. | 12-22-2011 |
20120008200 | PROJECTION DISPLAY SURFACE PROVIDING ARTIFACT REDUCTION - A projection display surface for reducing speckle artifacts from a projector having at least one narrow band light source having an incident visible wavelength band, wherein the incident visible wavelength band has an incident peak wavelength and an incident bandwidth, comprising: a substrate having a reflective layer that reflects incident light over at least the incident visible wavelength band; and a fluorescent agent distributed over the reflective layer, wherein the fluorescent agent absorbs a fraction of the light in the incident visible wavelength band and emits light in an emissive visible wavelength band having an emissive peak wavelength and an emissive bandwidth; wherein return light from the projection display surface produced when incident light in the incident visible wavelength band is incident on the projection display surface contains light in both the incident visible wavelength band and emissive visible wavelength band, thereby reducing speckle artifacts. | 01-12-2012 |
20120224036 | DUAL-VIEW STEREOSCOPIC DISPLAY USING LINEAR MODULATOR ARRAYS - A method for displaying first and second stereoscopic images to first and second viewers provides the first viewer with a first decoding device having a first viewer differentiating element for receiving the first stereoscopic image and further having a first left- and right-eye differentiating elements for separating left- and right-eye images. The second viewer is provided with a second decoding device having a second viewer differentiating element for receiving the second stereoscopic image and further having a second left- and right-eye differentiating element. The first stereoscopic image is displayed to the first viewer by forming a first left-eye image and forming a first right-eye image, each over substantially half of the refresh period. The second stereoscopic image is displayed to the second viewer by forming a second left-eye image and forming a second right-eye image, each over substantially half of the refresh period. | 09-06-2012 |
20120237890 | APPARATUS FOR CARIES DETECTION - An apparatus for obtaining an image of a tooth having at least one light source providing incident light having a first spectral range for obtaining a reflectance image from the tooth and a second spectral range for exciting a fluorescence image from the tooth. A polarizing beamsplitter in the path of the incident light from both sources directs light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor, wherein the second polarization state is orthogonal to the first polarization state. A first lens in the return path directs image-bearing light from the tooth toward the sensor, and obtains image data from the portion of the light having the second polarization state. A long-pass filter in the return path attenuates light in the second spectral range. | 09-20-2012 |
20120243100 | LINE ILLUMINATION APPARATUS USING LASER ARRAYS - A method for forming, onto a linear array light modulator, a line of illumination that extends in a linear direction, the method includes forming a first linear beam array and a second linear beam array, both linear beam arrays comprising a plurality of laser beams; forming a mixed illumination by aligning the first linear beam array and the second linear beam array in the linear direction and directing the first and second linear beam arrays along a propagation path; magnifying the mixed illumination from the propagation path in the linear direction and relaying the magnified mixed illumination toward the linear array light modulator; and focusing the mixed illumination in the cross-array direction that is orthogonal to the linear direction onto the linear array light modulator. | 09-27-2012 |
20120299998 | LIQUID EJECTION USING DROP CHARGE AND MASS - A continuous liquid ejection system includes a liquid chamber in fluidic communication with a nozzle. The liquid chamber contains liquid under pressure sufficient to eject a liquid jet through the nozzle. A drop formation device is associated with the liquid jet. The drop forming device is actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break off into one or more pairs of drops traveling along a path. Each drop pair is separated on average by a drop pair period. Each drop pair includes a first drop and a second drop. The drop formation device is also actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break of into one or more third drops traveling along the path separated on average by the same drop pair period. The third drop is larger than the first drop and the second drop. A charging device includes a charge electrode associated with the liquid jet and a source of varying electrical potential between the charge electrode and the liquid jet. The source of varying electrical potential provides a waveform that includes a period that is equal to the period of formation of the drop pairs or the third drops, the drop pair period. The waveform also includes a first distinct voltage state and a second distinct voltage state. The charging device and the drop formation device are synchronized to produce a first charge to mass ratio on the first drop of the drop pair, a second charge to mass ratio on the second drop of the drop pair, and a third charge to mass ratio on the third drop. The third charge to mass ratio is substantially the same as the first charge to mass ratio. A deflection device causes the first drop of the drop pair having the first charge to mass ratio to travel along a first path, and causes the second drop of the drop pair having the second charge to mass ratio to travel along a second path, and causes the third drop having a third charge to mass ratio to travel along a third path. The third path is substantially the same as the first path. | 11-29-2012 |
20120299999 | EJECTING LIQUID USING DROP CHARGE AND MASS - A liquid jet is modulated using a drop formation device to selectively cause portions of the liquid jet to break off into drop pairs and third drops traveling along a path. The third drop is larger than the drops of the drop pair. A charging device and the drop formation device are synchronized to produce a first charge to mass ratio on a first drop of the drop pair, produce a second charge to mass ratio on a second drop of the drop pair, and produce a third charge to mass ratio on the third drop. A deflection device causes the first drop having the first charge to mass ratio to travel along a first path, the second drop having the second charge to mass ratio to travel along a second path, and the third drop having a third charge to mass ratio to travel along a third path. | 11-29-2012 |
20120300000 | LIQUID EJECTION SYSTEM INCLUDING DROP VELOCITY MODULATION - A continuous liquid ejection system includes a liquid chamber in fluidic communication with a nozzle. The liquid chamber contains liquid under pressure sufficient to eject a liquid jet through the nozzle. A drop formation device is associated with the liquid jet and is actuatable to produce a modulation in the liquid jet that cause portions of the liquid jet to break off into a series of drop pairs traveling along a path. Each drop pair is separated in time on average by a drop pair period. Each drop pair includes a first drop and a second drop. A charging device includes a charge electrode associated with the liquid jet and a source of varying electrical potential between the charge electrode and the liquid jet. The source of varying electrical potential provides a waveform that includes a period that is equal to the drop pair period. The waveform also includes a first distinct voltage state and a second distinct voltage state. The charging device is synchronized with the drop formation device to produce a first charge state on the first drop and to produce a second charge state on the second drop. A drop velocity modulation device varies a relative velocity of a first drop and a second drop of a selected drop pair to control whether the first drop and the second drop of the selected drop pair combine with each other to form a combined drop. The combined drop has a third charge state. A deflection device causes the first drop having the first charge state to travel along a first path, causes the second drop having the second charge state to travel along a second path, and causes the combined drop having the third charge state to travel along a third path. | 11-29-2012 |
20120300001 | LIQUID EJECTION METHOD USING DROP VELOCITY MODULATION - A method of ejecting liquid drops includes providing liquid under pressure sufficient to eject a liquid jet through a nozzle of a liquid chamber. The liquid jet is modulated to cause portions of the liquid jet to break off into a series of drop pairs traveling along a path using a drop formation device. Each drop pair is separated in time on average by the drop pair period. Each drop pair includes a first drop and a second drop. A charging device is provided that includes a charge electrode associated with the liquid jet and a source of varying electrical potential between the charge electrode and the liquid jet. The source of varying electrical potential provides a waveform that includes a period that is equal to the drop pair period. The waveform also includes a first distinct voltage state and a second distinct voltage state. The charging device is synchronized with the drop formation device to produce a first charge state on the first drop and to produce a second charge state on the second drop. A relative velocity of a first drop and a second drop of a selected drop pair is varied using a drop velocity modulation device to control whether the first drop and the second drop of the selected drop pair combine with each other to form a combined drop. The combined drop has a third charge state. A deflection device is used to cause the first drop having the first charge state to travel along a first path, to cause the second drop having the second charge state to travel along a second path, and to cause the combined drop having the third charge state to travel along a third path. | 11-29-2012 |
20130016287 | DYNAMIC ILLUMINATION CONTROL FOR LASER PROJECTION DISPLAY - A display apparatus includes one or more imaging channels, each imaging channel includes a polarized light source and a spatial light modulator that is actuable to modulate the polarized light and provide a modulated polarized light. A control logic processor is disposed to receive and analyze each frame of image data for the one or more imaging channels. A variable brightness attenuator in the path of the modulated polarized light and actuable under the control of the control logic processor to attenuate the modulated polarized light to one of a plurality of attenuation levels for the one or more imaging channels according to each frame of image data. | 01-17-2013 |
20130249982 | DROP PLACEMENT ERROR REDUCTION IN ELECTROSTATIC PRINTER - A group timing delay device shifts the timing of drop formation waveforms supplied to drop formation devices of one of first and second nozzle groups so that print drops from the nozzle groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets from the nozzle groups and a source of varying electrical potential between the charge electrode and liquid jets which provides a charging waveform that is independent of a print and non-print drop pattern. The charging device is synchronized with the drop formation devices and the group timing delay device to produce a print drop charge state on print drops of a drop pair, a first non-print drop charge state on non-print drops of the drop pair, and a second non-print drop charge state on third drops. | 09-26-2013 |
20130249983 | DROP PLACEMENT ERROR REDUCTION IN ELECTROSTATIC PRINTER - A group timing delay device is provided to shift the timing of drop formation waveforms supplied to drop formation devices of nozzles of one of first and second groups so that print drops formed from nozzles of the first and second groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets formed from the nozzles of the first and second group and a source of varying electrical potential between the charge electrode and liquid jets. The source of varying electrical potential provides a charging waveform that is independent of print and non-print drop patterns. The charging device is synchronized with the drop formation device and the group timing delay device to produce a print drop charge state on print drops and a non-print drop charge state on non-print drops. | 09-26-2013 |
20130249984 | DROP PLACEMENT ERROR REDUCTION IN ELECTROSTATIC PRINTER - Drop formation devices are provided with drop formation waveforms to modulate liquid jets to cause portions of the liquid jets to form print drops having a jet breakoff length L | 09-26-2013 |
20130249985 | DROP PLACEMENT ERROR REDUCTION IN ELECTROSTATIC PRINTER - Drop formation devices are provided with a sequence of drop formation waveforms to modulate the liquid jets to selectively cause portions of the liquid jets to break off into print drops having a print drop volume V | 09-26-2013 |
20130257991 | FUNCTIONAL LIQUID DEPOSITION USING CONTINUOUS LIQUID DISPENSER - A method of dispensing liquid includes providing a carrier liquid under pressure using a first liquid supply that flows from the first liquid supply through a first liquid supply channel through a liquid dispensing channel through a liquid return channel and back to the first liquid supply continuously during a drop dispensing operation. A functional liquid is provided to the liquid dispensing channel through a second liquid supply channel using a second liquid supply. A drop formation device is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. The functional liquid is immiscible in the carrier liquid. The drop ejection device is selectively actuated to divert the discrete drop of the functional liquid and a portion of the carrier liquid flowing through the liquid dispensing channel toward an outlet opening of the liquid dispensing channel. | 10-03-2013 |
20130257994 | FUNCTIONAL LIQUID DEPOSITION USING CONTINUOUS LIQUID - A liquid dispenser includes a first liquid supply that provides a carrier liquid under pressure that flows from the first liquid supply through a first liquid supply channel through a liquid dispensing channel through a liquid return channel and back to the first liquid supply continuously during a drop dispensing operation. A second liquid supply provides a functional liquid to the liquid dispensing channel through a second liquid supply channel. A drop formation device, associated with an interface of the second liquid supply channel and the liquid dispensing channel, is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. The functional liquid is immiscible in the carrier liquid. A drop ejection device is selectively actuated to divert the discrete drop of the functional liquid and a portion of the carrier liquid flowing through the liquid dispensing channel toward the outlet opening of the liquid dispensing channel. | 10-03-2013 |
20130257996 | DIGITAL DROP PATTERNING DEVICE AND METHOD - A liquid dispenser array structure includes a liquid dispensing channel. A first liquid supply provides a carrier liquid that flows continuously through an outlet of the liquid dispensing channel during a drop dispensing operation. A plurality of liquid dispensers, located on a common substrate, includes a liquid supply channel and a second liquid supply that provides a functional liquid, immiscible in the carrier liquid, to the liquid dispensing channel through the liquid supply channel. A drop formation device, associated with an interface of the liquid supply channel and the liquid dispensing channel, is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. | 10-03-2013 |
20130257997 | DIGITAL DROP PATTERNING DEVICE AND METHOD - A liquid dispensing system includes a liquid dispenser array structure. A first liquid supply provides a carrier liquid that flows continuously through an outlet of a liquid dispensing channel during a drop dispensing operation. A plurality of liquid dispensers, located on a common substrate, includes a second liquid supply that provides a functional liquid, immiscible in the carrier liquid, to the liquid dispensing channel through a liquid supply channel. A drop formation device, associated with an interface of the liquid supply channel and the liquid dispensing channel, is selectively actuated to form discrete drops of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. A receiver conveyance mechanism and the liquid dispenser array structure are positioned relative to each other such that the discrete drops of the functional liquid are applied to a receiver. | 10-03-2013 |
20130258002 | DIGITAL DROP PATTERNING DEVICE AND METHOD - A method of dispensing liquid drops includes providing a liquid dispenser array structure. Liquid dispensers, located on a common substrate, include a liquid supply channel and a drop formation device associated with an interface of a liquid dispensing channel and the liquid supply channel. A carrier liquid is provided by a first liquid supply that flows continuously through an outlet of the liquid dispensing channel during a drop dispensing operation. A functional liquid, immiscible in the carrier liquid, is provided by a second liquid supply to the liquid dispensing channel through the liquid supply channel. The drop formation device is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. The flowing carrier liquid causes the discrete drops of the functional liquid to move through the outlet of the liquid dispensing channel during the drop dispensing operation. | 10-03-2013 |
20130302746 | APPARATUS FOR CARIES DETECTION - An apparatus for obtaining an image of a tooth having at least one light source providing incident light having a first spectral range for obtaining a reflectance image from the tooth and a second spectral range for exciting a fluorescence image from the tooth. A polarizing beamsplitter in the path of the incident light from both sources directs light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor, wherein the second polarization state is orthogonal to the first polarization state. A first lens in the return path directs image-bearing light from the tooth toward the sensor, and obtains image data from the portion of the light having the second polarization state. A long-pass filter in the return path attenuates light in the second spectral range. | 11-14-2013 |
20130328976 | DIGITAL DROP PATTERNING AND DEPOSITION DEVICE - A liquid dispenser includes a downwardly inclined slide surface. A carrier liquid dispensing channel includes an outlet that exits onto the downwardly inclined slide surface. A carrier liquid source provides a carrier liquid that flows continuously through the carrier liquid dispensing channel, through the outlet of the carrier liquid dispensing channel, and down the downwardly inclined slide surface. A functional liquid supply channel includes an outlet that exits onto the downwardly inclined slide surface. A functional liquid source provides a functional liquid to the outlet of the functional liquid supply channel. A drop formation device, associated with an interface of the outlet of the functional liquid supply channel and the downwardly inclined slide surface, is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing down the downwardly inclined slide surface. The functional liquid is immiscible in the carrier liquid. | 12-12-2013 |
20130328977 | DIGITAL DROP PATTERNING AND DEPOSITION DEVICE - A liquid dispensing system includes a downwardly inclined slide surface. A carrier liquid dispensing channel includes an outlet that exits onto the downwardly inclined slide surface. A carrier liquid flows continuously through the carrier liquid dispensing channel, the outlet of the carrier liquid dispensing channel, and down the slide surface. A liquid dispenser array structure includes functional liquid dispensers located on a substrate that is common to the functional liquid dispensers. The functional liquid dispensers include a functional liquid supply channel. A functional liquid source provides a functional liquid to the functional liquid dispensers through the functional liquid supply channel. A drop formation device, associated with an interface of the functional liquid supply channel and the downwardly inclined slide surface, is selectively actuated to form discrete functional liquid drops in the carrier liquid flowing down the slide surface. The functional liquid is immiscible in the carrier liquid. | 12-12-2013 |
20130330475 | DIGITAL DROP PATTERNING AND DEPOSITION DEVICE - Liquid dispensing includes providing a downwardly inclined slide surface and a carrier liquid dispensing channel that includes an outlet opening on the slide surface. A carrier liquid source is pressurized causing carrier liquid to flow continuously through the outlet opening of the carrier liquid dispensing channel and down the slide surface. A liquid dispenser array structure is provided and includes functional liquid dispensers located on a substrate that is common to the functional liquid dispensers. The functional liquid dispensers include a functional liquid supply channel, a functional liquid source that provides functional liquid, and a drop formation device associated with an interface of the functional liquid supply channel and the slide surface. The drop formation device is selectively actuated to form discrete functional liquid drops in the carrier liquid flowing down the slide surface. The functional liquid is immiscible in the carrier liquid. | 12-12-2013 |
20130342597 | VARIABLE DROP VOLUME CONTINUOUS LIQUID JET PRINTING - A liquid jet includes a fundamental period of jet break off. A print period is defined as N times the fundamental period of jet break off where N is an integer greater than 1. Input image data is provided having M levels per input image pixel including a non-print level where M is an integer and 212-26-2013 | |
20140253907 | APPARATUS AND METHOD FOR EVALUATION OF OPTICAL ELEMENTS - An apparatus for measuring the optical performance characteristics and dimensions of an optical element comprising a low coherence interferometer and a Shack-Hartmann wavefront sensor comprising a light source, a plurality of lenslets, and a sensor array is disclosed. The low coherence interferometer is configured to direct a measurement beam along a central axis of the optical element, and to measure the thickness of the center of the optical element. The light source of the Shack-Hartmann wavefront sensor is configured to emit a waveform directed parallel to and surrounding the measurement beam of the interferometer, through the plurality of lenslets, and to the sensor array. A method for measuring the optical performance characteristics and dimensions of a lens using the apparatus is also disclosed. | 09-11-2014 |
20140262972 | METALLIC AND SEMICONDUCTING CARBON NANOTUBE SORTING - A method of separating metallic semiconducting carbon nanotubes includes providing a source of a mixture of semiconducting and metallic carbon nanotubes in a carrier liquid with one of the semiconducting and metallic carbon nanotubes being functionalized to carry a charge. The mixture is pressurized to cause a liquid jet of the mixture to be emitted through a nozzle. A drop formation mechanism modulates the liquid jet to form from the jet first and second drops traveling along a path. An electric field modulating device, positioned relative to the jet, produces first and second electric fields. A deflection device applies the first electric field as the first drop is formed to concentrate the functionalized carbon nanotubes in the first drop and applies the second electric field as the second drop is formed. The deflection device causes the first or second drop to begin traveling along another path. | 09-18-2014 |
20140267668 | PORTABLE FUNDUS CAMERA - A portable hand-held ocular fundus camera system for imaging the fundus of the eye is disclosed. The camera system is comprised of a camera housing, one or more groups of lens in an internal cavity of the housing, a front group of lenses at the front end of the internal cavity, a contact member to contact at least a portion of the cornea, a light source configured to direct light from locations inside the camera through an annulus near the periphery of the front lens group, so that the light enters the eye through an annulus at the periphery of the pupil of the eye during contact with the cornea. Light from the light source that is reflected off of the fundus that passes through the center portion of the pupil of the eye is imaged onto an imager configured to acquire a sequence of images while an actuator coupled to the imager continuously varies the location of the imager along the optical axis of the camera. | 09-18-2014 |
20140273408 | METALLIC AND SEMICONDUCTING CARBON NANOTUBE SORTING - A method of printing an electronic device includes providing a source of a mixture of semiconducting carbon nanotubes and metallic carbon nanotubes in a carrier liquid, a printhead, and a substrate. The mixture of semiconducting carbon nanotubes and metallic carbon nanotubes in the carrier liquid is separated using the printhead. One of the separated semiconducting carbon nanotubes and the separated metallic carbon nanotubes is caused to contact the substrate in predetermined pattern. | 09-18-2014 |