Method and apparatus for monitoring a spectral radiometer

US11598668B2 · kind B2 · utility

Assignee

• Instrument Systems Optische Messtechnik GmbH · DE

Inventors

• Matthias Hoeh · Munich, DE
• Reto Haring · Munich, DE
• Florian Schewe · Munich, DE
• Martin Mangstl · Munich, DE
• Thorsten Kopp · Neubiberg, DE

Key dates

• Filing date: Aug 9, 2019
• Grant date: Mar 7, 2023
• Expiry date: Aug 9, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/2879
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method for monitoring a spectroradiometer (4), in particular for measuring light-emitting test objects (1), in which the spectral data of the test objects (1) are captured by means of an optical system, wherein the radiometric, photometric and/or colorimetric quantities of the test objects (1) are ascertained from the spectral data. The problem addressed by the invention is that of specifying a method for monitoring a spectroradiometer (4), where it is not the continuous recalibration of the spectroradiometer (4) but the monitoring of when a calibration is necessary that is paramount. The invention solves this problem by virtue of changes in the wavelength scale, in the light throughput and/or in the spectral sensitivity of the spectroradiometer (4) being detected by way of a reference light source (5), integrated into the optical system, with a defined spectrum. Optionally, at least one detector integrated into the optical system can additionally monitor the stability of the reference light source (5). Moreover, the invention relates to a device for carrying out the method.