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US 9,581,540 B2Granted
Spectral luminescence standard for the near infrared region
AssigneeGiesecke & Devrient GmbH
InventorsJohann Kecht, Kai Uwe Stock
Life of this patent
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Abstract
A spectral luminescence standard has bismuth in a light-transmissive inorganic matrix material and emits light in the near infrared region upon irradiation with excitation light. The bismuth acts as a luminescence emitter in the near infrared region. A method includes manufacturing such a spectral luminescence standard and a calibration medium which has the spectral luminescence standard in or on a carrier material.
Claims18
A spectral luminescence standard for calibrating a luminescence testing device, comprising:
- bismuth in a light-transmissive, optically transparent, inorganic matrix material,
- wherein the luminescence standard emits light in the near infrared region upon irradiation with excitation light, and bismuth acts as a luminescence emitter in the near infrared region,
- wherein the luminescence standard has a broadband luminescence emission in the near infrared region;
- and
- wherein the luminescence standard is a powder with a grain size of less than 50 μm.
2 more elements
A calibration medium for calibrating a luminescence testing device, comprising:
- a spectral luminescence standard including bismuth in a light-transmissive, optically transparent, inorganic matrix material, wherein the luminescence standard emits light in the near infrared region upon irradiation with excitation light, and bismuth acts as a luminescence emitter in the near infrared region, and
- a carrier for the spectral luminescence standard, wherein the carrier material is sheet-shaped;
- wherein the calibration medium has specifications regarding the spectral luminescence standard's luminescence target-value to be detected, the specifications being made available by the calibration medium having a barcode which effects a modulation of the luminescence signals detectable from the luminescence standard, the modulation corresponding to the luminescence target-value.
Dependencies are inferred from the claim text.