Basically, a spectrometer is an optical system consisting of two lenses/mirrors that produces an image of the input slit on the detector. In between the lenses/mirrors is placed a diffraction grating which disperses different wavelengths in different angles. NMR spectrometers have now become very complex instruments capable of performing an almost limitless number of sophisticated experiments. How-ever, the really important parts of the spectrometer are not that complex to understand in outline, and it is certainly helpful when using the spectrometer. While component types and devices vary from brand to brand, the core principle of how a spectrophotometer works stays largely the same. Figure 1: Components of a spectrophotometer: Light emitted from the source. Understanding the structure of a spectrometer is key for anyone working with spectroscopy. I will explain the principle as it applies to solid samples and solution samples separately. 1, first the intensity of the measurement light beam, I 0, is measured without the. This guide provides some simple and easy to use design guidelines and formulas for designing, evaluating and comparing various diode array, diffraction grating based spectrometers designs The input to the design process is the wavelength range you want to cover and the optical resolution by which. Two kinds of lamps, a Deuterium for measurement in the ultraviolet range and a tungsten lamp for measurement in the visible and near-infrared ranges, are used as the light sources of a spectrophotometer.
