Electrically tunable NIR spectrometer

The packaging of a miniaturized NIR-spectrometer is demonstrated. The heart of this NIR-spectrometer is an electrically tunable silicon surface micromachined Fabry- Perot interferometer (FPI). For reliable operation, the FPI device has to be mounted so that thermo-mechanical stresses are not present in its active area. This can be realized basically by mounting FPI on a substrate that has a thermal expansion coefficient close to silicon, using elastic material for mounting or minimizing the joint area between FPI and substrate. The FPI provides the possibility for the manufacturing of a miniaturized single-axis NIR-spectrometer for large-volume applications.© (1997) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.