Abstract: An overlay metrology system includes a multi-channel energy unit that selectively operates in a first mode to deliver first photons having a first wavelength to an object under test, and a second mode to deliver second photons to the object under test. The second photons have a second wavelength different from the first wavelength. The overlay metrology system further includes an electronic controller that selectively activates either the first mode or the second mode based at least in part on at least one characteristic of an object under test, and that generates the first protons or the second photons to detect at least one buried structure included in the object under test.

Abstract: A photonic testing device includes a substrate, an optical device under test (DUT) disposed over the substrate, and an optical input circuit disposed over the substrate. The optical input circuit includes a first plurality of inputs each configured to transmit a respective optical test signal of a plurality of optical test signals. Each of the plurality of optical test signals includes a respective dominant wavelength of a plurality of dominant wavelengths. The optical input circuit further includes an output coupled to an input waveguide of the optical DUT. The output is configured to transmit a combined optical test signal comprising the plurality of optical test signals.

Abstract: A present embodiment relates to a MDL measurement method and the like including a structure for enabling MDL measurement without increasing a processing load. The present embodiment sequentially executes, for N (?2) spatial modes, light-input operation of inputting light of a predetermined intensity to an arbitrary spatial mode, and intensity measurement operation of measuring an output light intensity of each of the N spatial modes including the arbitrary spatial mode, to generate a transfer matrix relating to transmission loss in an optical fiber as a measurement target, and determine at least a linear value of MDL per unit fiber length by using each component value of the generated transfer matrix.

Abstract: A method of dimensioning an object includes: projecting, from a plurality of laser emitters disposed on a dimensioning device and having a predefined spatial arrangement forming a plane, respective laser beams onto a surface of the object, the laser beams oriented parallel to each other; controlling an image sensor of the dimensioning device, simultaneously with the projecting, to capture image data representing the surface and projections of the laser beams on the surface; detecting projection pixel coordinates in the image data representing the projections of the laser beams on the surface; detecting edge pixel coordinates in the image data representing edges of the surface; and determining a dimension of the surface based on the projection pixel coordinates, the edge pixel coordinates, and the predefined spatial arrangement.

Abstract: A system for measuring light in a tube is provided. The system includes a tube, a light collecting probe configured to absorb light within the tube, a data acquisition system for determining a level of light associated with light absorbed by the light collecting probe, and a motion system for moving the light collecting probe within the tube.

Abstract: A system for optically scanning a region comprising a sample of which a chemical composition is to be determined, comprising: a pulsed laser source for emitting a pulsed laser beam; a focusing device for adjusting the position of the waist of the laser beam along an optical path of the laser beam; a deflector for adjusting a propagation direction of the laser beam to a given direction; a controller for varying, via the beam deflector, the propagation direction of the pulsed laser beam according to a predefined beam path and varying, via the focusing device, the given position of the waist of the laser beam along the optical path; and a photodetector for detecting light emitted by a plasma created when a given one of laser pulses has an irradiance is greater than a breakdown threshold, the detected light being indicative of the chemical composition of the sample.

Abstract: The system includes a modulatable illumination source configured to illuminate a surface of a sample disposed on a sample stage, a detector configured to detect illumination emanating from a surface of the sample, illumination optics configured to direct illumination from the modulatable illumination source to the surface of the sample, collection optics configured to direct illumination from the surface of the sample to the detector, and a modulation control system communicatively coupled to the modulatable illumination source, wherein the modulation control system is configured to modulate a drive current of the modulatable illumination source at a selected modulation frequency suitable for generating illumination having a selected coherence feature length. In addition, the present invention includes the time-sequential interleaving of outputs of multiple light sources to generate periodic pulse trains for use in multi-wavelength time-sequential optical metrology.

Abstract: In described examples, a spatial light modulator includes groups of pixels. Each group is arranged to transmit only a respective portion of a light spectrum. The respective portion has a respective dominant color. The respective portions of the light spectrum are distinct from one another, according to their respective dominant colors. Each group is controlled by a respective reset signal. The spatial light modulator is coupled to receive a selection from the integrated circuit and in response to the selection: cause a selected one of the groups to transmit its respective portion of the light spectrum; and cause an unselected one of the groups to block transmission of its respective portion of the light spectrum. A photodetector is coupled to: receive the respective portion of the light spectrum transmitted by the selected group; and output a signal indicating an intensity thereof.

Abstract: An adaptation device is provided for adapting an UV-Vis cuvette to perform in-situ spectroanalytical characterization of redox processes using gas species or solutes in a controlled atmosphere, the device configured to fit the open end of a UV-Vis cuvette intended to contain products to be measured during achievement of spectroanalytical measurements. The device comprises a main body configured to form a lid covering the opened end of the cuvette, the main body having a first part and a second part; a working, a counter and a reference electrode with removable parts at the respective ends of three conductors coming from outside and passing through the main body; a gas inlet to allow introduction of a gas the gas inlet having one aperture directed to the working electrode and second aperture directed to the bottom of the cuvette, a gas outlet intended to let the reactive gas in excess to flow out of the cuvette and an solution inlet tube for titration measurements.

Abstract: A system for capturing a 3D image of a subject includes a detection device which is structured to capture images of the subject and surrounding environment, a projection device which is structured to provide a source of structured light, and a processing unit in communication with the detection device and the projection device. The processing unit is programmed to: analyze an image of the subject captured by the detection device; modify one or more of: the output of the projection device or the intensity of a source of environmental lighting illuminating the subject based on the analysis of the image; and capture a 3D image of the subject with the detection device and the projection device using the modified one or more of the output of the projection device or the intensity of the source of environmental lighting illuminating the subject.

Abstract: A method detects discontinuities in an optical channel using two laser units that respectively have a laser and an electroabsorption modulator. The reference frequencies of the two lasers have a predetermined reference frequency difference. The optical ports of the electroabsorption modulator are fed to the two inputs of a polarization beam splitter and the output of the polarization beam splitter is connected to the optical channel. A test pulse is applied simultaneously to the two electroabsorption modulators and laser light from the lasers is thus transmitted through the respective electroabsorption modulators during the time of the test pulse. The test pulse is divided into two time periods, and during the first time period the lasers are operated with their respective reference frequency, and during the second time period the emission frequencies of the lasers are detuned with respect to the reference frequencies, by a predetermined detuning frequency difference.

Abstract: We disclose sensor systems, and associated calibration systems and methods, that provide efficient and reliable depth and texture fusion. One disclosed method includes transmitting a first light beam from a first perspective, transmitting a second light beam from a second perspective, aligning a visible light photodetector with the second perspective, aligning a depth sensor with the first perspective, and mutually registering the visible light photodetector and the depth sensor using a return of the first light beam, a return of the second light beam, and a reference map. The reference map can include a transform from a reference frame based on the first perspective and a reference frame based on the second perspective.

Abstract: Various embodiments disclose a dimensioner apparatus including a projector configured to project structured light in a field of view of the dimensioner apparatus, a first image capturing device configured to capture a first structured light image of the field of view, and a processor configured to analyze the first structured light image to identify a hole region in the first structured light image. The hole region in the first structured light image indicates a presence of a structured light absorbing platform that absorbs the projected structured light. Further, the processor is configured to operate the dimensioner apparatus in a two-dimensional (2-D) mode based on the identification of the hole region. The dimensioner apparatus, in the 2-D mode, is configured to determine one or more dimensions of a 2-D object placed on the absorbing platform.

Abstract: A tomography duct for wind tunnels includes a plurality of light sources and sensors displaced around a support structure. The light sources are cycled and sensor measurements are made from sensors opposite the light sources. Tomographic algorithms are used to determine an extinction map from the sensor measurements. The extinction map provides details about particles in a cross-section of the air flow through the tomography duct.

Abstract: In an example, a lab-on-chip Raman spectroscopy system is described. The lab-on-chip system includes a housing having a fluid channel formed thereon. The fluid channel is coupled to an inlet and to an outlet. A surface-enhanced Raman spectroscopy substrate is positioned inside the fluid channel. The surface-enhanced Raman spectroscopy substrate includes a plasmonic nanostructure and a sacrificial, conformal passivation coating deposited over at least the plasmonic nanostructure.

Abstract: A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell. A stepper flow control valves are disclosed that apply a physical fluid resistance to a flow of sheath fluid in the flow cytometer. The physical fluid resistance regulates a flow rate of the sheath fluid and thereby regulates a flow rate of sample fluid in the flow cytometer.

Abstract: A laser tracker system and method of operating the laser tracker system is provided. The laser tracker system includes a laser tracker device and a mobile computing device, each coupled for communication to a computer network. The mobile computing device includes processors that are responsive to computer instructions to perform a method. The method includes identifying the laser tracker device on the computer network. Selecting the first laser tracker device. Connecting to the laser tracker device to transmit signals therebetween via the computer network in response to an input from a user. Then causing the laser tracker device to perform one or more control functions in response to one or more second inputs from the user, wherein at least one of the one or more control functions includes selecting with the mobile computing device a retroreflective target and locking a light beam on the retroreflective target.

Abstract: Embodiments of the present application are directed toward a focusing Schlieren technique that is capable of adding color-coded directional information to the visualization of density gradients. Other advantages of the technique can include that it does not require manual calibration, has a simple design and is sensitive enough to be used in compact experimental setups. Certain embodiments include the use of a color-coded source image that replaces the conventional source grid. The technique may benefit from a computer-controlled digital background, which is used for both illumination and display of color-coded source images.

Abstract: An apparatuses relating generally to a test wafer, processing chambers, and method relating generally to monitoring or calibrating a processing chamber, are described. In one such an apparatus for a test wafer, there is a platform. An optical fiber with Fiber Bragg Grating sensors is located over the platform. A layer of material is located over the platform and over the optical fiber.

Abstract: An occupancy detection system uses at least two sensors which are mounted spaced apart in an area to be monitored. A test metric is formed which based on a combination of distances for the at least two sensors. The evolution of the test metric over time enables determination of whether there is a single occupant or multiple occupants in the area to be monitored.