Effective quad-detector occupancy sensors and motion detectors
First Claim
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1. A radiation detection system, comprising:
- a housing including a surface having an opening for receiving incident radiation;
an array of lens elements disposed across said opening of said housing;
a first radiation detector including a pair of sensitive areas; and
a second radiation detector including a pair of sensitive areas, wherein said first and second detectors are positioned so that as the direction of the incident radiation varies, at least one element of the lens array at least partially focuses the incident radiation successively onto at least three of four sensitive areas.
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Abstract
A method and apparatus for improving the sensitivity, angular resolution and range of motion detectors, occupancy sensors and similar systems are described. Specifically, an improved infrared input and detection section is described which utilizes two dual-detectors configured to optimally operate equivalent to a single quad-detector.
7 Citations
23 Claims
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1. A radiation detection system, comprising:
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a housing including a surface having an opening for receiving incident radiation;
an array of lens elements disposed across said opening of said housing;
a first radiation detector including a pair of sensitive areas; and
a second radiation detector including a pair of sensitive areas, wherein said first and second detectors are positioned so that as the direction of the incident radiation varies, at least one element of the lens array at least partially focuses the incident radiation successively onto at least three of four sensitive areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21)
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10. A radiation detection system, comprising:
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a housing including a surface having an opening for receiving incident radiation;
an array of Fresnel lens elements disposed across said opening of said housing; and
a radiation detector including at least four sensitive areas positioned so that as the direction of the incident radiation varies, at least one element of the lens array at least partially focuses the incident radiation successively onto at least three of the four sensitive areas. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 22)
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20. A radiation detection system, comprising:
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a housing including a surface having an opening for receiving incident radiation;
an array of Fresnel lens elements disposed across said opening of said housing, wherein said lens array includes a center line; and
a pair of dual detectors disposed symmetrically about said center line of said lens array, wherein each of said pair of dual detectors includes a pair of sensitive areas separated by about 1 mm and wherein the pair of sensitive areas of a first of said pair of dual detectors is separated from the pair of sensitive areas of a second of said pair of dual detectors by about 5 mm, whereby said pair of dual detectors defines a quad-detector, wherein the detectors are positioned so that as the direction of the incident radiation varies, at least one element of the lens array at least partially focuses the incident radiation successively onto at least three of the four sensitive areas. - View Dependent Claims (23)
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Specification