spectroscope

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spectroscope,

optical instrument for producing spectral lines and measuring their wavelengths and intensities, used in spectral analysis (see spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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). When a material is heated to incandescence it emits light that is characteristic of the atomic makeup of the material. In the original spectroscope design in the early 19th cent., light entered a slit and a collimating lens transformed the light into a thin beam of parallel rays. A prism then separated the beam into its spectrum. The observer then viewed the spectrum through a tube with a scale that was transposed up the spectrum image, enabling its direct measurement. With the development of photographic film, the more accurate spectrograph was developed. It was based on the same principle as the spectroscope, but it had a camera in place of the telescope. In recent years the electronic circuits built around the photomultiplier tube have replaced the camera, allowing real-time spectrographic analysis of far greater accuracy. Such spectrum analysis, or spectroscopy, has become an important scientific tool for analyzing the composition of unknown material. It has found applications in fields as disparate as astronomy and forensic chemistry.

spectroscope

[′spek·trə‚skōp]
(spectroscopy)
An optical instrument consisting of a slit, collimator lens, prism or grating, and a telescope or objective lens which produces a spectrum for visual observation.

spectroscope

any of a number of instruments for dispersing electromagnetic radiation and thus forming or recording a spectrum
References in periodicals archive ?
Providing an up-to-date overview on spectroscopical diagnostics of low temperature plasma Spectroscopy of Low Temperature Plasma covers the latest developments and techniques.
The structural changes due to nitric acid attack on HIPS are identified by spectroscopical and thermal measurements.
The Chemistry of Cyclobutanes provides an in depth and comprehensive review of cyclobutanes and includes chapters on the theoretical and computational foundations; on analytical and spectroscopical aspects with dedicated chapters on Mass Spectrometry, NMR and IR/UV.

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