Abstract: A method for purifying phycocyanin from a phycocyanin-containing solution is provided. The method comprises a first step of partially purifying the solution by aqueous two-phase separation (ATPS) and a second step of purifying the phycocyanin by ammonium sulfate precipitation. The purified phycocyanin product can in some cases be of a sufficiently pure grade to be used as a food or cosmetic pigment.

Abstract: A three-dimensional (3D) measuring system and a method of determining a distance is provided. A three-dimensional (3D) measuring system includes a master part having a first base part and a first part-under-test including a second base. A photogrammetry camera images the master part to generate two-dimensional (2D) images. A first 3D imager determines 3D coordinates in a first imager frame of reference. A second 3D imager determines 3D coordinates in a second imager frame of reference. The system determines in a system frame of reference a first pose of the first imager and a second pose of the second imager. The system is further configured to determine 3D coordinates of the first part-under-test in the system frame of reference.

Abstract: A method for purifying phycocyanin from a phycocyanin-containing solution is provided. The method comprises a first step of partially purifying the solution by aqueous two-phase separation (ATPS) and a second step of purifying the phycocyanin by ammonium sulfate precipitation. The purified phycocyanin product can in some cases be of a sufficiently pure grade to be used as a food or cosmetic pigment.

Abstract: A method of mixing fluid flowing in a raceway channel is provided which includes directing the fluid to flow over a ramp which extends across the raceway channel. The ramp has a leading surface which is inclined at between about 5° and 45° upwardly to a top edge, and a trailing surface which extends vertically downwardly from the top edge. The height of the ramp is selected so that the top edge is lower than the level of the fluid in the raceway channel.

Abstract: The present invention relates generally to the field of cataract surgery and more particularly to methods and apparatus for performing a capsulorhexis. This invention is in the field of medical devices. The present invention relates to a device constructed from metals, polymers or other materials that are amenable to precise surface modifications and methods for its use, wherein (1) the device assists in capsulorhexis and (2) a patterned surface having milli-, micron-, and/or nano-sized micropatterning characteristics that imparts surface stabilizing and self-adhesive properties.

Abstract: A system includes an upper platform, a turntable platen, and a mounting shaft, the upper platform including a central surface surrounded by an outer ring, the outer ring having a collection of markers, the mounting shaft positioned between the upper platform and the turntable platen.

Abstract: A system and method for performing noncontact three-dimensional (3D) coordinates. The system including a system includes a noncontact three-dimensional (3D) measuring device operable to measure 3D coordinates of an object. A stage is operable to rotate the object. A mechanical arm is coupled to the 3D measuring device, the mechanical arm being operable to rotate the 3D measuring device in a first arc about a first axis and in a second arc about a second axis, the first arc larger than the second arc.

Abstract: A three-dimensional (3D) measuring system and a method of determining a distance is provided. A three-dimensional (3D) measuring system includes a projector operable to project a pattern of light onto an object. A camera is operable to image the projected pattern of light. An electrical power distribution network is operable to receive alternating current having a line frequency. A control system is operable to set an exposure time of the camera to a positive integer divided by twice a line frequency. A processor is operable to determine three-dimensional (3D) coordinates of a point on the object based at least on the projected pattern of light and on the imaged pattern of light.

Abstract: A three-dimensional (3D) measuring system and a method of determining a distance is provided. A three-dimensional (3D) measuring system includes a master part having a first base part and a first part-under-test including a second base. A photogrammetry camera images the master part to generate two-dimensional (2D) images. A first 3D imager determines 3D coordinates in a first imager frame of reference. A second 3D imager determines 3D coordinates in a second imager frame of reference. The system determines in a system frame of reference a first pose of the first imager and a second pose of the second imager. The system is further configured to determine 3D coordinates of the first part-under-test in the system frame of reference.

Abstract: The present invention relates generally to the field of cataract surgery and more particularly to methods and apparatus for performing a capsulorhexis. This invention is in the field of medical devices. The present invention relates to a device constructed from metals, polymers or other materials that are amenable to precise surface modifications and methods for its use, wherein (1) the device assists in capsulorhexis and (2) a patterned surface having milli-, micron-, and/or nano-sized micropatterning characteristics that imparts surface stabilizing and self-adhesive properties.

Abstract: A three-dimensional (3D) measuring system and a method of determining a distance is provided. The 3D measuring system includes a display and an imager device. The imager device having a projector, a first camera and a second camera arranged in a predetermined geometric relationship, the first and second camera each having a photosensitive array with a plurality of pixels that transmit a signal in response to a wavelength of light. The projector projects a pattern that includes at least one element. The system further having one or more processors operably coupled to the display, the projector, and the first and second camera. The processors are responsive to computer instructions for determining a distance to the at least one element and changing an indicator on the display corresponding to the distance relative to a predetermined projector-to-object distance.

Abstract: A system and method for generating a point cloud of a scanned object is provided. The method includes determining a distance to each of a plurality of points on the object based at least in part on a phase shift of a light emitted from a measurement device having at least two image devices. A point cloud is generated based at least in part on the distances to the plurality of points. An edge point is identified from a 2D image acquired by one of the image devices. A corresponding point is determined in the other image device based at least in part on a first phase value of the edge point and a epipolar relationship between the image devices. The 3D coordinates of the edge point and the corresponding point are determined based on triangulation. The edge point is added to the point cloud.

Abstract: A three-dimensional (3D) measuring system and a method of determining a distance is provided. The 3D measuring system includes a display and an imager device. The imager device having a projector, a first camera and a second camera arranged in a predetermined geometric relationship, the first and second camera each having a photosensitive array with a plurality of pixels that transmit a signal in response to a wavelength of light. The projector projects a pattern that includes at least one element. The system further having one or more processors operably coupled to the display, the projector, and the first and second camera. The processors are responsive to computer instructions for determining a distance to the at least one element and changing an indicator on the display corresponding to the distance relative to a predetermined projector-to-object distance.

Abstract: The present invention relates generally to the field of cataract surgery and more particularly to methods and apparatus for performing a capsulorhexis. This invention is in the field of medical devices. The present invention relates to a device constructed from metals, polymers or other materials that are amenable to precise surface modifications and methods for its use, wherein (1) the device assists in capsulorhexis and (2) a patterned surface having milli-, micron-, and/or nano-sized micropatterning characteristics that imparts surface stabilizing and self-adhesive properties.

Abstract: A method of advertising includes maintaining an Internet-related communication session between a user and a portal and, during the communication session, selectively providing advertisements based on any one of user constraints, sales criteria, and context.