Abstract: Laser conversion of multilayer optical film bodies comprising polyester and polycarbonate materials.

Abstract: Laser conversion of multilayer optical film bodies comprising polyester and polycarbonate materials.

Abstract: Laser cutting of multilayer optical film bodies comprising polyester and polycarbonate materials.

Abstract: A coated abrasive article comprises an abrasive layer secured to a backing. The abrasive layer comprises abrasive particles secured by at least one binder to a first major surface of the backing. A supersize is disposed on at least a portion of the abrasive layer. The coated abrasive article has a melt flow zone adjacent to an edge of the coated abrasive article, wherein the melt flow zone has a maximum width of less than 100 micrometers, and the melt flow zone has a maximum height of less than 40 micrometers. Methods of using infrared lasers to ablate coated abrasive articles are also disclosed, wherein a laser wavelength is matched to a component of the coated abrasive article.

Abstract: Laser cutting of multilayer optical film bodies comprising polyester and polycarbonate materials.

Abstract: In a measurement system wherein time-varying physical signals containing frequency information related to a physical parameter of an object are measured to obtain corresponding time-varying measurement signals, a method and system are disclosed for processing the measurement signals to obtain a value for the physical parameter by first extracting the frequency information from the measurement signals. The frequency information includes at least one desired frequency. The physical signals are electromagnetic signals. The object is a film such as a layer formed on a substrate, the physical parameter may be thickness of the layer.

Abstract: In a measurement system wherein time-varying physical signals containing frequency information related to a physical parameter of an object are measured to obtain corresponding time-varying measurement signals, a method and system are disclosed for processing the measurement signals to obtain a value for the physical parameter by first extracting the frequency information from the measurement signals. The frequency information includes at least one desired frequency and its amplitude and decay rate. Then, the frequency information is converted to a value for the physical parameter. The measurement signals are discrete time ultrasonic signals. Extraction is performed by transforming the ultrasonic signals to a Z-domain and converting at least one zero or pole in the Z-domain to the at least one frequency and its decay rate.

Abstract: In a measurement system wherein time-varying physical signals containing frequency information related to a physical parameter of an object are measured to obtain corresponding time-varying measurement signals, a method and system are disclosed for processing the measurement signals to obtain a value for the physical parameter by first extracting the frequency information from the measurement signals. The frequency information includes at least one desired frequency and its amplitude and decay rate. Then, the frequency information is converted to a value for the physical parameter. The measurement signals are discrete time ultrasonic signals. Extraction is performed by transforming the ultrasonic signals to a Z-domain and converting at least one zero or pole in the Z-domain to the at least one frequency and its decay rate.

Abstract: A method and system are provided to measure a physical parameter of a film such as film thickness or build, in both the wet and dry states of the film, on an article in a production environment without any contact or damage to the film or the rest of the article. The system includes two laser light sources, one pulsed and the other substantially continuous (i.e. long pulses), an interferometer, fiber optic cables, and appropriate optics including multiplexers and demultiplexers to: 1) image and transmit light from both sources to the film on the article; and 2) transmit the light from the continuous source reflected off the film surface back to the interferometer, and a computer containing a data acquisition card to record the data after signal processing and appropriate software to process the data. Light from both light sources are imaged on and over the same spot on the surface of the film. The pulsed light source is used to generate ultrasound in the film.

Abstract: In a measurement system wherein time-varying physical signals containing frequency information related to a physical parameter of an object are measured to obtain corresponding time-varying measurement signals, a method and system are disclosed for processing the measurement signals to obtain a value for the physical parameter by first extracting the frequency information from the measurement signals. The frequency information includes at least one desired frequency and its amplitude and decay rate. Then, the frequency information is converted to a value for the physical parameter. The measurement signals are discrete time ultrasonic signals. Extraction is performed by transforming the ultrasonic signals to a Z-domain and converting at least one zero or pole in the Z-domain to the at least one frequency and its decay rate. The physical signals may be coherent light signals which are modulated based on the frequency information which is related to propagation of longitudinal ultrasonic waves in the object.