Solid State Array Detector Spectrometers:

These spectrometers are of recent origin and as the name suggests these make use of solid state detectors. These have permitted the analysts to get over the problems of conventional sequential and simultaneous spectrometers. Recent commercial instruments have started using two dimensional detectors. These incorporate charge injection devices (CIDs) or charge coupled devices (CCDs). These devices may allow the simultaneous measurement of more than 250,000 lines and 5000 lines respectively. Figure depicts a schematic representation of the solid state array detector based spectrometers.

Figure: A schematic diagram showing the layout and optical diagram of spectrometer based on solid state detector

In the CCD based spectrometers the whole analytically usable part of the spectrum is measured on a series of CCDs placed in the Rowland circle of a spectrometer.  The important aspect of these instruments is that these give the resolution and sensitivity virtually identical to sequential or direct reading polychromators using photomultiplier tubes. The CID based instruments on the other hand are Echelle spectrometers that incorporate the CIDs as the detectors.