The use of pulsed fast scanning quantum cascade lasers from block engineering allows the construction of new MID-IR spectrometers, which can record an IR spectrum over 1100 cm in a few seconds-1 be able to record. In contrast to the infrared lamps used in conventional IR and FTIR spectrometers, QCLs have a very high spectral intensity (line width approx. 1 cm-1 and average power in the 1-3 mW range) in a collimated beam. This achieves a significantly higher signal/noise ratio and the measurement time can be reduced. This new technique opens up additional possibilities in molecular spectroscopy and in process monitoring.
laser scope consists of a tunable QCL and an MCT detector with control electronics and spectroscopy software. It can also be connected to most IR microscopes and can also be combined with some standard light microscopes. In this application, the ability to focus to around 6 µm is a major advantage over conventional techniques.
With laser scan a hand-held spectrometer is presented for the first time, which at the push of a button in a few seconds a complete MID-IR spectrum over 1100cm-1 picks up. The measuring distance to the sample can be 600mm and more. An integrated adjustment laser beam marks the measurement volume. In this way, gaseous and liquid samples or thin films can be measured easily.
For process applications, the Block MID-IR spectrometers can also be equipped with fiber-coupled ATR measuring heads.
