Astrophysics (index)

Spectrograph

(device to record the spectrum of incoming light)

A Spectrograph is an instrument to record the spectrum of incoming light. The terms Spectrograph, Spectroscope, and Spectrometer now are used interchangeably for advanced instruments.

The term Spectrograph was given to a device that guides light through a prism or Grating to lay out the spectrum spatially and focuses this on photographic film, recording it for later study. This is in contrast to a Spectroscope, which was given to a device that you look through to observe the spectrum, so a Spectrograph was much like a Spectroscope with a camera attached. The term Spectrometer has always been a general term that encompasses either.

Modern advanced instruments virtually always focus the spectrum on a CCD or similar sensor, allowing the spectral data to be transmitted, recorded and analyzed electronically, and any of the three terms may be used. The terms may be used for analyzers of any part of the Electromagnetic Radiation (EMR) spectrum, but when used for other than Visible Light, that is usually mentioned, e.g., the phrase "X-ray Spectrometer".


(color,EMR,instrument type)
http://en.wikipedia.org/wiki/Spectrograph
http://spie.org/publications/fg08_p02_spectrometerspectroscopespectrograph

Referenced by:
Anglo-Australian Telescope (AAT)
Black Body (BB)
Cassini
CorMASS
Cosmic Evolution Survey (COSMOS)
CRIRES
Cross Dispersion Spectrograph
Discovery Channel Telescope (DCT)
Exoplanet Eclipse Light Curve
European Extremely Large Telescope (E-ELT)
European Southern Observatory Very Large Telescope (ESO VLT)
Europa Clipper
4MOST
Gemini Observatory
Giant Magellan Telescope (GMT)
Gran Telescopio Canarias (GTC)
Hale Telescope
HARPS
HARPS-N
HCI
HERMES
Hobby-Eberly Telescope (HET)
HRS
Hubble Space Telescope (HST)
Imaging Fourier Transform Spectroscopy (IFTS)
Integral Field Unit (IFU)
Imaging Spectrometer
Integral Field Spectrograph
IRTF
Juno
Keck Observatory
KMOS
LAMOST
Large Binocular Telescope (LBT)
Magellan Telescopes
Mass Spectrometer
Mercator Telescope
MMT
Multi-Object Spectrograph
New Technology Telescope (NTT)
Phase Curve
Position-Position-Velocity Space (PPV)
Southern African Large Telescope (SALT)
Sloan 2.5m Telescope
Spectral Resolution (R)
Spectrography
Spectrometer
Spectrometry
Spectroscope
Spectroscopy
SpeX
SPHEREx
Stellar Age Determination
Subaru Telescope
Telescopio Nazionale Galileo (TNG)
TripleSpec (TSpec)
James Webb Space Telescope (JWST)
William Herschel Telescope (WHT)
WiggleZ

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