NASA NTRS · 19870039385
Wide field and diffraction limited array camera for SIRTF
Abstract
The Infrared Array Camera for the Space Infrared Telescope Facility (SIRTF/IRAC) is capable of two-dimensional photometry in either a wide field or diffraction-limited mode over the wavelength interval from 2 to 30 microns. Three different two-dimensional direct readout (DRO) array detectors are being considered: Band 1-InSb or Si:In (2-5 microns) 128 x 128 pixels, Band 2-Si:Ga (5-18 microns) 64 x 64 pixels, and Band 3-Si:Sb (18-30 microns) 64 x 64 pixels. The hybrid DRO readout architecture has the advantages of low read noise, random pixel access with individual readout rates, and nondestructive readout. The scientific goals of IRAC are discussed, which are the basis for several important requirements and capabilities of the array camera: (1) diffraction-limited resolution from 2-30 microns, (2) use of the maximum unvignetted field of view of SIRTF, (3) simultaneous observations within the three infrared spectral bands, and (4) the capability for broad and narrow bandwidth spectral resolution. A strategy has been developed to minimize the total electronic and environmental noise sources to satisfy the scientific requirements.
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Fazio, G. G., Koch, D. G., Melnick, G. J., Tresch-Fienberg, R. M., Willner, S. P., Gezari, D. Y., Lamb, G., Shu, P., Chin, G., Mccreight, C. R.. 1986-01-01. Wide field and diffraction limited array camera for SIRTF. https://ntrs.nasa.gov/citations/19870039385
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