Spectroscopic components prisms

The components of different frequency or wavelength are called lines because, in the early spectroscopic experiments, the radiation from the sample was passed through a slit and then through a prism the image of the slit was then focused on a photographic plate, where it appeared as a line. 

Spectroscope A device that uses a prism or diffraction grating to separate light into its color components. 

SPECTRO INSTRUMENTS. Spectro is used as a prefix for a wide assortment of analytical instruments. Spectro is derived from spectrum, which originally referred to the component colors that make up visible light, the so-called rainbow colors of violet, indigo, blue, green, yellow, orange, and red. A very simple device made up of a glass prism to break up sunlight into color bands is referred to as a spectroscope. Much more sophisticated instruments are available for manual manipulation and observation, which still rely on this basic, simple principle these are termed visual spectroscopes, and the field is called visual spectroscopy. 

An example of quasi CW THz detection [86] uses a THz wave parametric oscillator (TPO) consisting of a Q-switched Nd YAG laser and parametric oscillator [87,88], In this technique, MgO LiNb3 is employed as a non-linear material to generate CW THz. Silicon prisms couple the THz radiation from the non-linear crystal where it is detected using a pyroelectric detector. THz images are collected at discrete THz frequencies and then spectroscopically analyzed using a component spatial pattern analysis method to determine sample composition. 

Spectroscopic tests. Flame spectra The only worthwhile way to employ flame tests in analysis is to resolve the light into its component tints and to identify the cations present by their characteristic sets of tints. The instrument employed to resolve light into its component colours is called a spectroscope. A simple form is shown in Fig. II.3. It consists of a collimator A which throws a beam of parallel rays on the prism B, mounted on a turntable the telescope C through which the spectrum is observed and a tube D, which contains a scale of reference lines which may be superposed upon the spectrum. The spectroscope... 

Components of a spectroscope collimator (A) prism (B) telescope (C) scale (D)... 

On the other hand, those characteristics of the laser that are important for its applications in spectroscopy are treated in more detail. Examples are the frequency spectmm of different types of lasers, their linewidths, amplitude and frequency stability, tunability, and tuning ranges. The optical components such as mirrors, prisms, and gratings, and the experimental equipment of spectroscopy, for example, monochromators, interferometers, photon detectors, etc., are discussed extensively because detailed knowledge of modem spectroscopic equipment may be cmcial for the successfiil performance of an experiment. 

Raman spectra were obtained with a Japan Spectroscopic Company model R800 laser Raman spectrophotometer and a Coherent Radiation model CR8 argon ion laser operating at 51 5 nm. Parallel Iy(v) and perpendicular polarized component spectra were recorded with a Glan-Thomson prism as an analyser, and the isotropic I (v) and anisotropic Io(v) component spectra were obtained using ... 

When a beam of parallel rays of light enters a triangular glass prism, it is dispersed into its component wavelengths, as illustrated in Fig. 6.13 see color plate following page 78). This separation of light is the basis of the SPECTROSCOPE. 

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