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NIRSpec IFU image slicer

NIRSpec IFU image slicer

Date: 04 September 2013
Satellite: JWST
Copyright: SSTL

The Integral Field Unit (IFU) of the NIRSpec instrument allows for spectral imaging of extended astronomical objects. A key element of the IFU is the image slicer, which cuts the 3 arcsec × 3 arcsec field of view into 30 slices of 0.1 arcsec × 3 arcsec. Each slice gives rise to 30 contiguous spectra on the detectors for a total of 900 spectra, each corresponding to a tiny spatial element of size 0.1 arcsec × 0.1 arcsec.

The image slicer is pictured here after diamond machining. Each of the 30 slices is less than 1 mm wide and has its own curve and tilt.


Last Update: 28 May 2021
24-Apr-2024 02:02 UT

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