The near infrared camera (NIRCam) for the James Webb Space Telescope (JWST)

Scott Horner, Marcia Rieke

Research output: Contribution to journalConference article

31 Scopus citations

Abstract

The NIRCam science objectives are the detection and identification of "first light" objects, the study of star and brown dwarf formation, and the detection and characterization of planetary systems and their formation. These three science programs are also the key objectives of the JWST program as a whole. The NIRCam instrument design is optimized for these objectives within the mission constraints. NIRCam consists of two optics modules, each with a field of view of 2.2 arcmin square. The modules are identical except for the mechanical layout. Each module consists of two channels divided by a dichroic beamsplitter. The short wavelength channel has a band pass of 0.6 - 2. 3 microns, with pixels sized for Nyquist sampling of the PSF at 2.0 microns. The long wavelength channel has a band pass of 2.4 - 5.0 microns, with pixels sized for Nyquist sampling at 4.0 microns. Selections of wide (R~4), intermediate (R~10), and narrow (R~100) bandwidth filters are provided in each of the four channels, along with coronagraphic occulting masks and pupil stops. A refractive optical design results in a smaller instrument volume and mass, provides good images at the pupils for wavefront sensing and coronagraphy, allows good access to the pupils and focal planes, and relaxes the alignment requirements compared to a reflective design.

Original languageEnglish (US)
Pages (from-to)628-634
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5487
Issue numberPART 2
DOIs
StatePublished - Dec 20 2004
EventOptical, Infrared, and Millimeter Space Telecopes - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004

Keywords

  • Infrared
  • JWST
  • Space instruments

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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