Spectrometers> Applications
The family of non-scanning, high performance spectrometers supplied by P&P Optica can be used in many applications ranging from biomedicine to process control. The following types of systems are available:
- High performance systems which allow rapid acquisition of high resolution spectra with remarkable dynamic range.
- Multichannel systems that are used to replace multiple spectrometers in an application, acquire characterization of objects from multiple directions at once, or in process control applications.
- Imaging spectrometers that can be used in aerial photography, microscopy and any other applications requiring hyperspectral images.
The following images showcase a typical 10 channel P&P Optica spectrometer using a TE cooled 1044 by 128 pixels CCD detector.
Acetone vapor spectrum obtained in a 100 ms acquisition, averaged along the slit. Fine spectral details can be seen in this low noise spectrum. The image was obtained using a high performance spectrometer with 3 mm entrance slit. The signal was summed across the entire height of the detector to provide cleaner, higher dynamic range spectrum. As can be seen from the figures, exceptional detail is visible in the peaks around 730 nm and 900 nm.
A series of spectra obtained for milk and cream of various fat concentrations. This experiment was also performed with a 3 mm slit. Various milk samples from the same supplier were measured to determine differences in the spectra. A test tube filled with milk was placed in a P&P Optica sample holder which minimizes spectral shift due to heating effects. A very stable light source was used to illuminate the sample, and a glass mixing rod was used to collect the transmitted light to the entrance slit of the dispersive spectrometer. Spectral data for each different sample was obtained simultaneously with the dispersive system, so that no effects due to the turbulence of the medium are visible, unlike typical high performance scanning spectrometers.
Spectra of 3 laser lines obtained in a 100 ms acquisition. Single row of pixels is compared to averaging the spectra along a whole slit. Dynamic range of the TE cooled 3 mm wide detector equipped spectrometer reaches more than 5 octaves. Exceptional detail is visible in the laser line spectra, with very strong secondary peaks.
Typical screen capture of a multichannel spectrometer. The 2D image of the entire CCD is presented above, with specific channels observing different sources placed below. As can be seen, there is no cross talk between channels.
For more in-depth information regarding the advantages of P&P Optica's spectrometers, please refer to a white paper "Multichannel Imaging Spectrometers"
