Bandgap radiation detector
First Claim
Patent Images
1. A detector for radiation, comprising:
- a periodic pattern of photoconductive or photovoltaic, bandgap detector elements spaced apart at a period which is equal to or less than the wavelength of said radiation, said pattern of detector elements having a given radiation impedance,substructure means for supporting said detector elements and for providing impedance matching between the radiation impedance of said pattern of detector elements and free space radiation impedance, andmeans for electrically connecting said detector elements for producing a detection signal when said detector is exposed to said radiation.
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Abstract
An infrared radiation detector device has an array of detectors each of which comprises a pattern of parallel detector elements. Each detector produces a pixel signal for an image. The elements of the detector are photoconductive or photovoltaic bandgap materials and the elements are spaced apart at a dimension which is equal to or less than the wavelength of the radiation to be received. Additional layered structures above and/or below the detector elements provide impedance matching between free space radiation and the radiation impedance of the detector elements to increase the capture of radiation.
20 Citations
28 Claims
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1. A detector for radiation, comprising:
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a periodic pattern of photoconductive or photovoltaic, bandgap detector elements spaced apart at a period which is equal to or less than the wavelength of said radiation, said pattern of detector elements having a given radiation impedance, substructure means for supporting said detector elements and for providing impedance matching between the radiation impedance of said pattern of detector elements and free space radiation impedance, and means for electrically connecting said detector elements for producing a detection signal when said detector is exposed to said radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A detector for radiation, comprising:
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a periodic pattern of parallel, elongate, photoconductive or photovoltaic, bandgap detector elements spaced apart at a period which is equal to or less than the wavelength of said radiation, said pattern of detector elements having a given radiation impedance, substructure means for supporting said detector elements and for providing impedance matching between the radiation impedance of said detector elements and free space radiation impedance, and means for electrically connecting said detector elements for producing a detection signal when said detector is exposed to said radiation. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A detector for radiation comprising:
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a dielectric plate, a periodic pattern of photoconductive or photovoltaic, bandgap detector elements spaced apart at a period which is equal to or less than the wavelength of said radiation, said detector elements mounted on said dielectric, and a conductive layer joined to a surface of said dielectric opposite said pattern of detector elements, wherein the combination of said dielectric plate and said conductive layer serves to increase the absorption of said pattern of detector elements, and means for electrically connecting said detector elements to produce a detection signal when said detector is exposed to said radiation. - View Dependent Claims (17, 18, 19, 20)
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21. A radiation imager, comprising:
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a substructure means, an array of detectors spaced uniformly on said substrate means, each detector comprising a periodic pattern of photoconductive or photovoltaic, bandgap detector elements spaced apart at a period which is equal to or less than the wavelength of said radiation, said detectors having a given radiation impedance, and electrical means for connecting said detector elements to produce a detection signal for each of said detectors, said substructure means for providing impedance matching between the radiation impedance of said detectors and free space radiation impedance, and said detection signals comprising an image signal when said imager is exposed to said radiation. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification