Showing posts with label layer thickness. Show all posts
Showing posts with label layer thickness. Show all posts

Thursday, November 28, 2019

Abstract-Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces



Ilaria Cacciari, Daniele Ciofini, Hubert Baija, Salvatore Siano,

https://www.mdpi.com/1996-1944/12/23/3822

Here, a systematic study in order to assess the potential of THz time domain reflectometry for measuring the thicknesses of overpaint layers applied on original gilded surfaces was carried out. The work is part of a thorough characterization campaign, which is going on at the Rijksmuseum for addressing the conservation problems of a set of 19th century gilded picture frames on which heavy coatings were applied in previous undocumented restoration interventions. To perform such non-invasive thickness measurements, an analytical protocol based on Gaussian fits of the THz pulse-echo temporal profiles was optimized through the preparation of suitable technical samples and the comparison with direct thickness measurements. Finally, the methodology was validated by characterizing the microstratigraphy of an original sculptural element from a gilded picture frame in the Rijksmuseum collection. The results achieved show the effectiveness of the present approach in revealing multi-layered dielectric microstructures with a spatial resolution of about 30 µm when using a spectral range up to 1.5 THz.

Wednesday, January 28, 2015

Advanced Photonix Introduces Handheld Terahertz Product


http://finance.yahoo.com/news/advanced-photonix-introduces-handheld-terahertz-133000289.html

ANN ARBOR, Mich., Jan. 28, 2015 /PRNewswire/ -- Advanced Photonix, Inc.® (NYSE MKT: API) announces the introduction of the T-Gauge® SPG (single-point gauge), an addition to the T-Ray®5000 product family. This handheld accessory is targeted at measuring material thickness for quality control in the aerospace and nondestructive testing markets. The T-Gauge® SPG is designed for at-line manufacturing environments and makes use of terahertz properties to nondestructively penetrate many opaque materials to allow measurement of layer thickness. The T-Gauge® SPG can make layer thickness measurements with the pull of a trigger in single or multi-layer products made from a wide variety of materials such as plastics, rubber, paper, paint and other coatings.
Advanced Photonix, Inc.
Incorporating fundamental technology advances developed by Advanced Photonix, and its subsidiary Picometrix, LLC, over the past 18 years, the T-Gauge® SPG provides layer thickness resolution that surpasses that of other measurement tools. With a simplified user interface, the same tool can measure multiple product configurations, and with a variety of tips, even hard to access locations can be examined.
"We are pleased to announce this addition to the terahertz product family which has recently begun shipping to the aerospace market for application on the F-35 Joint Strike Fighter program. This product will be used to spot check layer thickness during production, which is complimentary to the recently announced handheld accessory product development contract with the US Air Force to assist in the assembly and maintenance of the F-35. The T-Gauge® SPG will help us further penetrate the aerospace market and open up new markets where existing technologies have limitations, including measuring through air gaps or measuring products with varying substrate properties," according to Dr. Irl Duling, Director of Terahertz Business Development at Advanced Photonix.
The handheld tool is connected to a T-Ray® 5000 intelligent terahertz control unit (TCU) that provides the optoelectronics that drive the T-Gauge® SPG. The industrially ruggedized T-Ray® 5000 TCU meets the high standards of speed and accuracy required for high-volume manufacturing as well as the advanced research laboratory (UL and CE marked).  The T-Gauge® SPG has been designed to meet the high standards of precision, portability, and ruggedness set by the T-Ray®5000.
The T-Gauge® SPG will be demonstrated at Photonics West in the Advanced Photonix booth number 401. The show is in San Francisco from February 10-12, 2015.
About Advanced Photonix, Inc.Advanced Photonix, Inc.® (NYSE MKT: API) is a leading supplier of optoelectronic sensors, devices and instruments used by Test and Measurement, Process Control, Medical, Telecommunication and Homeland Security markets. The company has three product lines: Optosolutions focuses on enabling manufacturers to measure physical properties, including temperature, particular counting, color, and fluorescence for Medical, Homeland Security and Process Control applications. The Terahertz sensor product line is targeted to the Process Control, to enable quality control, and Security markets through nondestructive testing. The T-Gauge® sensor can measure subsurface physical properties, like multi-layers thicknesses, density, moisture content, anomaly detection and some chemical features, online and in real time. High-Speed Optical Receiver (HSOR) products are used by the telecommunication market in both telecommunication equipment and in test and measurement equipment utilized in the manufacturing of telecommunication equipment. For more information visit us on the web at www.advancedphotonix.com.
The information contained herein includes forward looking statements that are based on assumptions that management believes to be reasonable but are subject to inherent uncertainties and risks including, but not limited to, unforeseen technological obstacles which may prevent or slow the development and/or manufacture of new products; potential problems with the integration of the acquired company and its technology and possible inability to achieve expected synergies; obstacles to successfully combining product offerings and lack of customer acceptance of such offerings; limited (or slower than anticipated) customer acceptance of new products which have been and are being developed by the Company; and a decline in the general demand for optoelectronic products.