Infrared Detector Elements, IRAS Satellite

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    1 of 14

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    2 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    3 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    4 of 14

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    There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    5 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    6 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    7 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    8 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    9 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    10 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    11 of 14

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    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    12 of 14

    Usage Conditions Apply

    There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

    13 of 14

    Usage Conditions Apply

    There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

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    Infrared Detector Elements, IRAS Satellite

    Varied shapes, in small plastic bags or boxes. Less than an inch in any dimension, metallic and most have some sort of elecrtrical connector; the collection includes: J-FET module, five IR detector wafers, two VIS detectors and their substrates, three IR detectors and cavities for bands 1 and 4, two feedback resistors, four detector chips for bands 2, 3 and 4 four filter elements for band 2.

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Display Status:

This object is on display in the Explore the Universe exhibition at the National Air and Space Museum in Washington, DC.

This suite of 5 infrared detector elements is a small representative sample of the ones utilized in the focal plane assembly of the Infrared Astronomical Satellite (IRAS). They consist of photoconductive materials that change in electrical resistance in response to infrared radiation. They were variously constructed from silicon arsenide, antimonide and germanium gadolinium. A total of 62 detectors were mounted at the telescope's focal plane in an assembly that also included such accessories as field lenses and filters that further narrowed the response range. The entire array was cooled to 2.8 degrees K (-269.2 degrees Centigrade) by superfluid liquid helium in order to maximize sensitivity.

Rockwell International built the focal plane assembly and transferred it to the Jet Propulsion Laboratory in 1981 at which time it was integrated into IRAS. This set of elements was transferred to NASM by JPL in 1995.