English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Physikalisch-Technische Bundesanstalt (PTB) has extended its capability for the realization and dissemination of the absolute spectral responsivity of thermal detectors from the near-infrared into the mid infrared (MIR) wavelength range. The calibration method relies on the application of a large area, multi-junction thin film thermopile detector as a transfer standard, characterized with two independent approaches in terms of its MIR spectrally flat (in a word: grey) relative spectral responsivity. The required SI traceability is achieved through absolute calibrations in the wavelength range from 1.5 μm to 2.4 μm against the PTB national detector standard, the cryogenic electrical substitution radiometer. In combination with an upgraded MIR dedicated spectral comparator setup, this allows the measurement and dissemination of the spectral responsivity up to a wavelength of 5 μm with relative standard uncertainties below 2 %.

1.2 - Absolute Mid-infrared Spectral Responsivity Scale Based on Thermal Detectors and the Cryogenic Radiometer