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| physical object > artifact > device > instrument > optical device > detector > spectrograph | 
| spectrograph comparison table | ||
| Subject | has acronym | has definition | 
|---|---|---|
| diffraction grating spectrograph | ||
| Fourier Transform Spectrometer | FTS | |
| imaging spectrometer | Class of instruments which preserve the image field while also determining the spectrum. Integral Field Unit (IFU). Usually implies some kind of image slicing either with facets or fiber optics. | |
| NICMOS | Near Infrared Camera for Multi-Object Spectrography. | |
| spectroheliograph | Device with which spectra of the various regions of the Sun are obtained and photographed. | |
| UVES | Ultraviolet Echelle Spectrograph. | 
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