To shorten the wait for the 14th ThGOT and the 6th Optics Colloquium we would like to give you a small foretaste of our numerous exciting technical presentations in the coming weeks.
Terahertz & thermography: test methods for thickness determination in the plastics sector
Marcel Mayr / SKZ - KFE gGmbH - Non-destructive Testing, Würzburg
The determination of wall and coating thicknesses is of great importance for a large number of industrial processes due to required quality parameters. In addition, environmental aspects and intense competition demand efficient manufacturing methods with minimal material and energy consumption, which requires appropriate measurement technology.
Time-of-flight measurements by means of electromagnetic waves represent a very reliable and efficient method for determining the wall and individual layer thicknesses, for example in multilayer systems, on a point-by-point basis with accuracies in the micrometer range using known propagation velocities. Plastics have good transmission properties, particularly in the terahertz (THz) spectral range, which is why the use of THz pulses is ideal for determining wall and layer thicknesses. In contrast to ultrasonic technology, THz measurement technology can also be used to examine foamed plastics.
In addition, no coupling medium is required and the measurement can therefore take place without contact. Active thermography is another method for measuring coating thickness. After active heating of a component and observation of the surface temperature by means of an infrared camera, statements can be made about the internal structure and existing layer thicknesses of a component.
This talk will be presented on 03/14/2019 at 15:30 in the 6th Colloquium Thin Films in Optics
Antireflection coatings by means of ALD
Dr. Adriana Szeghalmi / Fraunhofer Institute for Applied Optics and Precision Engineering (IOF), Jena, Germany
Antireflection coatings are essential for almost all optical systems, from simple consumer products such as eyeglasses or cameras to sophisticated applications such as satellite-based imaging and surveillance or laser process technology. In this paper, we present the advantages of atomic layer deposition (ALD) for optical components using single-layer and broadband antireflection coatings as examples. Complex shaped substrates made of glass or polymers were coated along the entire surface.
This talk will be presented on 03/14/2019 at 11:30 am in the 6th Colloquium Thin Films in Optics