Spectroscopy in the ShortWave InfraRed (SWIR) range proves more and more to be a reliable tool for inline inspection and classification of a variety of products. Applications find their way in food and agriculture, waste sorting, pharmaceuticals, cancer detection… due their ability to identify specific chemical bonds. Since each molecule has its own spectral fingerprint, we can thus discern between materials with only the slightest difference in molecular structure just by looking at specific wavelengths.
Because visible cameras can only give us information based on RGB color differences or on spectral content up to a wavelength of 1.0 μm, this can be insufficient when trying to differentiate between objects of similar color or with its fingerprint features more into the SWIR region.
In such cases, high performance InGaAs focal plane and line-scan arrays can provide us with the necessary information we need to effectively steer the production process to better yield and efficiency. One of the latest InGaAs line scan cameras, the Lynx- 2048 with a 2048 pixel line array on a 12.5 μm pixel pitch, pushes technology to new heights. In combination with a spectrometer, this camera will increase the level of detail and hence delivers more information or resolution to the user. Use of the Lynx not only makes these types of setups simpler, but also much cheaper than before.
An overview of potential candidates for spectroscopy applications can be found below:
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