Passive infrared detectors
First Claim
Patent Images
1. An infrared motion detector comprising:
- at least one infrared radiation sensor;
at least one radiation reflecting surface, operative to direct radiation impinging thereon towards said at least one infra-red radiation sensor; and
at least one coating layer, coating said at least one radiation reflecting surface, which is substantially reflective to far infra-red radiation and which strongly absorbs at least one of visible light and near infra-red radiation, wherein said at least one coating layer comprises black nickel.
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Abstract
An infrared motion detector including at least one infra-red radiation sensor, at least one radiation reflecting surface, operative to direct radiation impinging thereon towards the at least one infra-red radiation sensor and at least one coating layer, coating the at least one radiation reflective surface, which is substantially reflective to far infra-red radiation and which strongly absorbs at least one of visible light and near infra-red radiation, wherein the at least one coating layer includes black nickel.
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Citations
26 Claims
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1. An infrared motion detector comprising:
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at least one infrared radiation sensor; at least one radiation reflecting surface, operative to direct radiation impinging thereon towards said at least one infra-red radiation sensor; and at least one coating layer, coating said at least one radiation reflecting surface, which is substantially reflective to far infra-red radiation and which strongly absorbs at least one of visible light and near infra-red radiation, wherein said at least one coating layer comprises black nickel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radiation reflector for use in motion detectors, to direct far infrared radiation towards an infrared radiation sensor, comprising:
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at least one radiation reflecting surface; at least one coating layer coating said radiation reflecting surface which is substantially reflective to far infrared radiation and which strongly absorbs at least one of visible light and near infrared radiation, wherein said at least one coating layer comprises black nickel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A radiation reflector, for use in motion detectors, to direct far infrared radiation towards an infrared radiation sensor, the radiation reflector comprising:
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a substrate base made of a plastic material; a first layer of electroless conductive coating plated over at least part of said substrate base; and a second layer comprising black nickel electroplated over said first layer. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification