PerkinElmer Raman Flex 400 Series, Руководство по началу работы

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30 . RamanFlex 400 Series Getting Started Guide
Spectrograph Detector Systems
The Raman
Flex
400 Series are equipped with an Echelle spectrograph.
The Echelle Spectrograph
Figure 9 Schematic of the Echelle Spectrograph
PerkinElmer’s Echelle detector is shipped in the RamanFlex 400 Series. The system contains
two components; the Echelle spectrograph and a two-dimensional CCD detector. The system
works by dispersing the light in two dimensions by using two gratings (Figure 9). The first
grating disperses the light horizontally onto the second grating, where the light is further
dispersed vertically onto the CCD detector. The light is spread over a number of strips on the
CCD that are read simultaneously; therefore a full spectral range (at high resolution) can be
achieved with one acquisition.
Figure 10 Strips of light on the CCD detector using the Echelle spectrograph
100 cm
−1
1000 cm
−1
3000 cm
−1
4000 cm −1
2000 cm −1
3000 cm
−1
1000 cm
−1
2000 cm
−1
1000 Pixels
CCD Detector
Lens #2
Lens #1
Grating #2
Grating #2