Astrophysics (Index)About

integral field spectrograph

(integral field spectrometer)
(spectrograph that captures images)

An integral field spectrograph (or integral field spectrometer) combines spectrography and imaging, producing a "cube" of data (three dimensions), two being spatial (the image) and one being the spectral data at each specified point. Its use is called integral field spectroscopy (IFS).

It is commonly a "normal" spectrograph plus an integral field unit (IFU). A "normal" spectrograph collects data from a narrow line-like area rather than from a two-dimensional area, offering spectral data over one spatial dimension. The integral field unit rearranges points of light so that the slit includes data across a two-dimensional area, paying for this capability by lowering the spatial resolution. Spectrographs are often built so they can be used with or without the integral field unit.

Methods used:

(color,EMR,spectrography,instrument type)
Further reading:

Referenced by pages:
data cube
Gemini Observatory
Gran Telescopio Canarias (GTC)
Hale Telescope
integral field unit (IFU)
imaging spectrometer
Keck Observatory
multi-object spectrograph
VIMOS-VLT Deep Survey (VVDS)