Instrument Systems Gmbh

Instrument Systems Optische Messtechnik Gmbh

Martin Mangstl

Florian Schewe

Reto Haring

Siegbert Sadowski

Matthias Hoeh

Thorsten Kopp

Christian Rixner

Angel Gavrailov

Christian Dotzler

Reto Häring

Methods and devices for the sequential measurement of a plurality of semiconductor-based light sources that operate faster, more accurately and more sensitively than known methods and devices. In accordance with one implementation, a current pulse is applied by a pulsed current source to the low-luminosity light sources consecutively or simultaneously. The emitted light pulse of LED is converted into electric charge carriers by a photodiode, the electric charge carries are added up by means an integrator circuit, the added-together charge carriers are converted by an A/D converter into a digital signal and the digital signal is forwarded to a measurement and control unit.

Device and method for measuring semiconductor-based light sources

The invention relates to a method for monitoring a spectroradiometer (), in particular for measuring light-emitting test objects (), in which the spectral data of the test objects () are captured by means of an optical system, wherein the radiometric, photometric and/or colorimetric quantities of the test objects () are ascertained from the spectral data. The problem addressed by the invention is that of specifying a method for monitoring a spectroradiometer (), where it is not the continuous recalibration of the spectroradiometer () 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 () being detected by way of a reference light source (), 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 (). Moreover, the invention relates to a device for carrying out the method.

Method and apparatus for monitoring a spectral radiometer

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Munich, Germany

Martin Mangstl