The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.

A method includes introducing light into a glass article such that at least a portion of the introduced light is emitted from an edge of the glass article. The light emitted from an edge of the glass article is detected. An intensity profile of the emitted light is an intensity of the emitted light as a function of axial position. A first intensity boundary of the intensity profile and a second intensity boundary of the intensity profile are determined. A thickness of a layer of the glass article is determined based on an axial distance between the first intensity boundary and the second intensity boundary.

The attenuation and other optical properties of a medium are exploited to measure a thickness of the medium between a sensor and a target surface. Disclosed herein are various mediums, arrangements of hardware, and processing techniques that can be used to capture these thickness measurements and obtain three-dimensional images of the target surface in a variety of imaging contexts. This includes general techniques for imaging interior/concave surfaces as well as exterior/convex surfaces, as well as specific adaptations of these techniques to imaging ear canals, human dentition, and so forth.

A method includes: navigating a spray nozzle across and applying a coating to a region of a structure via the spray nozzle; illuminating the coating applied to the region; detecting an intensity of light emitted by the coating at the region; calculating a coating thickness of the coating applied to the region of the structure based on the intensity of light; in response to the coating thickness exceeding a threshold thickness, confirming application of the coating on the region of the structure; in response to the coating thickness falling below the threshold thickness, flagging the region of the structure for coating repair.

A corrosion analysis assembly including a computed tomography scanner positioned relative to a component, the computed tomography scanner configured to non-destructively scan a section of the component to identify corrosion sites and measure spatially resolved characteristic parameters for the corrosion sites to provide a corrosion data set.

A method includes: navigating a spray nozzle across and applying a coating to a region of a structure via the spray nozzle; illuminating the coating applied to the region; detecting an intensity of light emitted by the coating at the region; calculating a coating thickness of the coating applied to the region of the structure based on the intensity of light; in response to the coating thickness exceeding a threshold thickness, confirming application of the coating on the region of the structure; in response to the coating thickness falling below the threshold thickness, flagging the region of the structure for coating repair.

Described herein are methods and systems for measuring polarization states of nonlinearly generated light by a sample illuminated in response to receiving an incident beam having a known polarization state to determine a characteristic of the sample. The system includes an optical ellipsometer configured to be included in-line of a semiconductor fabrication line and generate measured signals proportional to different polarization parameters of second-harmonic light nonlinearly generated light by the sample, allowing determination of a complete polarization state of the second harmonic light using a characteristic of the sample is determined.

A virtual metrology apparatus, a virtual metrology method, and a virtual metrology program that allow a highly accurate virtual metrology process to be performed is provided. A virtual metrology apparatus includes an acquisition unit configured to acquire a time series data group measured in association with processing of a target object in a predetermined processing unit of a manufacturing process, and a training unit configured to train a plurality of network sections by machine learning such that a result of consolidating output data produced by the plurality of network sections processing the acquired time series data group approaches inspection data of a resultant object obtained upon processing the target object in the predetermined processing unit of the manufacturing process.

A virtual metrology apparatus, a virtual metrology method, and a virtual metrology program that allow a highly accurate virtual metrology process to be performed is provided. A virtual metrology apparatus includes an acquisition unit configured to acquire a time series data group measured in association with processing of a target object in a predetermined processing unit of a manufacturing process, and a training unit configured to train a plurality of network sections by machine learning such that a result of consolidating output data produced by the plurality of network sections processing the acquired time series data group approaches inspection data of a resultant object obtained upon processing the target object in the predetermined processing unit of the manufacturing process.

Aspects of the present disclosure may include systems and methods for assessing high resolution surface pressure fields generated by air moving across at least a portion of a bluff body, the method including covering the at least a portion of the surface of the bluff body with a layer of oil film comprising a luminescent dye; placing the bluff body in moving air with a constant velocity; assessing the luminescence of the dye in at least two consecutive time periods, wherein the luminescence of the dye is related to the thickness of the oil film at one or more locations on the surface of the bluff body.