Instrument Systems Optische Messtechnik Gmbh

Instrument Systems Gmbh

Aug. Winkhaus Gmbh. Co., Kg

Florian Schewe

Reto Haring

Ludger Kaup

Martin Mangstl

Markus Estermann

Christoph Kappel

Thomas Hommel

Felix Frank

Amy M Winkler

Siegbert Sadowski

Thorsten Kopp

Reto Häring

Christian Dotzler

Angel Gavrailov

Christian Rixner

Matthias Hoeh

Corin Michael Ricardo Greaves

Andreas Hakenes

Stefan Niehues

Wolfgang Bernsmann

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

The invention relates to an apparatus for generating light, comprising a plurality of light sources (), &#x2014;a control device (), which drives the light sources (), and a superimposition optical unit, which superimposes the light emitted by the light sources () in an exit opening (). It is an object of the invention to provide an apparatus which is improved compared with the prior art. For this purpose, the invention proposes that the superimposition optical unit comprises a first concave mirror (), in the focal plane of which the light sources () are situated, an optical grating (), onto which the first concave mirror () reflects the light () emitted by the light sources (), and &#x2014;a second concave mirror (), which reflects the light () diffracted at the optical grating () onto the exit opening () situated at the focus of the second concave mirror ().

Light source having a controllable spectrum

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Munich, Germany

Florian Schewe