Integrated infrared microlens and gas molecule getter grating in a vacuum package
First Claim
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1. A vacuum-sealed Dewar assembly, comprising:
- a substrate;
a plurality of infrared (IR) detectors on said substrate; and
an IR window comprising a plurality of microlenses positioned to focus IR radiation transmitting onto respective IR detectors, said IR window being sealed with respect to said substrate to form a substanially vacuum enclosure.
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Abstract
An infrared (IR) microlens array has a plurality of microlenses (12) aligned with respective IR detector array pixels (6) to focus incoming IR radiation onto the pixels (6) to improve the efficiency of IR detection, and a gas molecule getter grating (14) inside a vacuum-sealed Dewar assembly that houses the detector array (4) increases the surface area of the getter (15) to improve the efficiency of removing residual gas molecules from the Dewar assembly.
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Citations
20 Claims
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1. A vacuum-sealed Dewar assembly, comprising:
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a substrate; a plurality of infrared (IR) detectors on said substrate; and an IR window comprising a plurality of microlenses positioned to focus IR radiation transmitting onto respective IR detectors, said IR window being sealed with respect to said substrate to form a substanially vacuum enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vacuum-sealed Dewar assembly, comprising:
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a substrate; a plurality of infrared (IR) detectors on said substrate; and an IR window that is sealed with respect to said substrate to form a substantially vacuum enclosure and has a surface portion that is substantially transparent to at least some wavelengths of IR radiation so that said radiation is detectable by said IR detectors, said IR window comprising a plurality of protrusions having surfaces on which a getter material is positioned to chemically react with residual gas molecules in said enclosure to remove said gas molecules. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An infrared (IR) window that is substantially transparent to at least some wavelengths of IR radiation, comprising:
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a first surface; a second surface having a portion contoured to form a plurality of microlenses and another portion contoured to form a plurality of grating columns defined by a plurality of recesses; and a getter material positioned on said grating column portion of said second surface adapted to chemically react with gas molecules to remove said gas molecules. - View Dependent Claims (18, 19, 20)
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Specification