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AssigneeHoneywell International Inc.
InventorsMark C. Buckley, Kevin M. Pelletier, Jeffrey L. Blitstein
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An optical filter device for filtering radiation energy includes a substrate having a plurality of coating layers which are both transmissive to a specified wavelength band of radiation. The plurality of coating layers on a surface of the substrate each have a specified coating thickness. The plurality of coating layers cause destructive interference and/or reflection of the radiation outside the specified wavelength band of the radiation while radiation within the specified wavelength band is passed through the substrate and the plurality of coating layers. The substrate or window/filter may be positioned in a housing between a receiving element such as a pyroelectric element and the radiation energy wherein the specified wavelength band of radiation passes through the substrate and plurality of coating layers to the pyroelectric element. A signaling device communicates a signal indicating when the radiation energy within the specified wavelength band reaches the at least one pyroelectric element.
An optical filter device, comprising:
An optical filter device, comprising:
A pyroelectric sensing device, comprising:
A pyroelectric sensing device, comprising:
A method for detecting intrusion, comprising:
A method for detecting intrusion, comprising:
Dependencies are inferred from the claim text.