PTBnews 03.2021 — In collaboration with an industrial partner, PTB has developed and assessed a very compact wavelength standard. This standard is based on a diode laser whose frequency is stabilized to transitions of the […]
PTBnews 3.2021 — At PTB, absolute length measurements on a single-crystal silicon gauge block have been performed using imaging interferometry. These measurements have a smaller measurement uncertainty than all previous measurements. They provide more accurate […]
Researchers at the National Institute of Standards and Technology (NIST) have conducted the first demonstration of a faster and more accurate way to calibrate certain kinds of microphones. The technique, which uses lasers to measure […]
June 30, 2021 Magnetic resonance imaging (MRI) is widely used in medicine to detect, diagnose and treat diseases such as cancer, while relying on experts’ interpretation of images. Quantitative MRI, which obtains numerical measurements during […]
June 24, 2021 Conventional microscopes provide essential information about samples in two dimensions — the plane of the microscope slide. But flat is not all that. In many instances, information about the object in the […]
May 05, 2021 – Ottawa, Ontario Cancer has been one of life’s great mysteries, with the body turning on itself without apparent reason. It is often viewed as a disease of the modern world, but […]
PTBnews 1.2021 Ball plates and hole plates are measurement standards typically used to ensure the traceability of coordinate measuring machines. To arrange the plates vertically, one single supporting stand is often used that is placed […]
by Flavio Galliana, Roberto Cerri, & Davide Corona At the National Institute of Metrological Research (INRIM) an automatable precision DC voltage fixed-ratios divider allows the division ratios of DC Voltages from 10:1 to 107:1. It […]
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