Overview of NIRCam instrument components
The NIRCam science observing modes at 0.6–5.0 μm include imaging, coronagraphy, and grism wide field slitless spectroscopy, as well as specialized time-series monitoring modes. To support these modes, as well as wavefront sensing for mirror alignment, information on the NIRCam instrument hardware is available in these articles:
- NIRCam Optics describes the mirrors and other elements;
- NIRCam Coronagraphic Occulting Masks and Lyot Stops describes the bar and round occulting masks;
- NIRCam Pupil and Filter Wheels describes the Lyot stops, filters, and other elements;
- NIRCam Filters describes the broad-, medium-, and narrowband filters;
- NIRCam Grisms describes slitless spectroscopy with R = λ/Δλ ~ 1,600, dispersing light along detector rows or columns;
- NIRCam Weak Lenses describes weak lenses used to defocus light, enabling imaging of brighter targets without saturation;
- NIRCam Detectors describes the 8 short wavelength (0.6–2.3 µm) and 2 long wavelength (2.4–5.0 µm) detectors covering the same field of view for both modules.
For wavefront sensing and mirror alignment, additional optical elements are available in the pupil and filter wheels.
The two NIRCam modules contain nearly identical sets of all of these elements.
JWST User Documentation Home
Near Infrared Camera, NIRCAM
NIRCam Observing Modes
NIRCam Field of View
NIRCam Coronagraphic Occulting Masks and Lyot Stops
NIRCam Pupil and Filter Wheels
NIRCam Filters for Coronagraphy
NIRCam Weak Lenses
NIRCam Detector Subarrays
NIRCam Detector Readout
NIRCam Detector Readout Patterns
NIRCam Detector Performance
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