Raman History, Theory and Instrumentation . 27
The Echelle Spectrograph
Figure 8 Schematic of the Echelle Spectrograph
The RamanMicro 300 is connected to the Echelle spectrometer in the RamanStation 400F or
RamanFlex 400 Series. The spectrometer contains two components; the Echelle spectrograph
and a two ̵ dimensional CCD detector. The spectrograph works by dispersing the light in two
dimensions by using two gratings (Figure 8). 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 9 Strips of light on the CCD detector using the Echelle spectrograph
Range 1 + Range 2 + Range 3 + Range 4 = Complete Spectrum (all ranges acquired
simultaneously).
Figure 9 shows a schematic diagram of light falling on the CCD detector. Here 4 strips of light
are shown for clarity, but in practice up to 12 strips are acquired and resolution of up to
2 cm
−1
(peak FWHM) can be achieved.
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
Summary of Contents for RamanMicro 300 Series
Page 1: ...RamanMicro 300 Series Getting Started Guide MOLECULAR SPECTROSCOPY...
Page 5: ...Introduction...
Page 10: ...10 RamanMicro 300 Getting Started Guide...
Page 11: ...Safety Practices...
Page 21: ...Raman History Theory and Instrumentation...
Page 29: ...Preparing Your Facility...
Page 35: ...Installing Your RamanMicro 300...
Page 68: ...68 RamanMicro 300 Getting Started Guide...
Page 69: ...Using the RamanMicro 300...
Page 90: ...90 RamanMicro 300 Getting Started Guide...