Conventional scanning spectrometers have the disadvantage that it is necessary to bring the object to be analysed to spectrometer. Based on the development of micro mirrors at the Center for Microtechnologies of Technische Universität Chemnitz a small hand held spectrometer had been developed at the Fraunhofer ENAS Chemnitz (till June 30th 2008 Chemnitz Branch of Fraunhofer IZM) in cooperation with Colour Control Farbmesstechnik GmbH Chemnitz. The micro mirror spectrometer is realized in a simple optical set-up according to conventional scanning spectrometer.
A scanning micro mirror, combined with a diffraction grating, is the essential element. It periodically disperses polychromatic radiation into its spectral components, which are measured by a single element detector. There is radiation coupling either directly or by using fiber optics, which allows an easy attachment of substance samples. Detectors can be thermoelectrically cooled depending on the application. Lowest noise preamplifiers enable high-precise measurements over a wide dynamic range. Via USB or RS-485 interface data can be transferred to a personal computer or Laptop where application software allows graphical presentation and further processing. The firmware can be customized to meet different requirements.