What is spectrometer?

  • (noun): Spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer.
    Synonyms: mass spectrometer


A spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. The variable measured is most often the light's intensity but could also, for instance, be the polarization state. The independent variable is usually the wavelength of the light or a unit directly proportional to the photon energy, such as wavenumber or electron volts, which has a reciprocal relationship to wavelength. A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared. If the instrument is designed to measure the spectrum in absolute units rather than relative units, then it is typically called a spectrophotometer. The majority of spectrophotometers are used in spectral regions near the visible spectrum.

Read more about Spectrometer.

Some articles on spectrometer:

Acousto Optical Spectrometer
... An Acousto Optical Spectrometer (AOS) is based on the diffraction of light at ultrasonic waves ... length of the imaging optics, the resolution of this type of spectrometer can be varied ...
Imaging Spectrometer
... An imaging spectrometer is an instrument used in hyperspectral imaging and imaging spectroscopy to acquire a spectrally-resolved image of an object or ... Example imaging spectrometer types include filtered camera, whiskbroom scanner, pushbroom scanner, integral field spectrograph (or related dimensional reformatting techniques), wedge ...
Lunar Atmosphere And Dust Environment Explorer - Instruments
... The science payload consists of Neutral Mass Spectrometer (NMS), which will perform in situ measurements of exospheric species ... UV-Vis Spectrometer (UVS), which will measure both the dust and atmosphere ... instrument has heritage from the UV-Vis spectrometer on the LCROSS mission ...
List of Scientific Instruments
... optics, infrared light spectra Magnetograph, magnetic field Magnetometer, magnetic flux Mass spectrometer, compound identification/characterization Micrometer, distance Microscope ...
Spectrometer - Spectrographs
... An echelle spectrograph uses two diffraction gratings, rotated 90 degrees with respect to each other and placed close to one another ... Therefore an entrance point and not a slit is used and a 2d CCD-chip records the spectrum ...