Passive infra-red sensor
First Claim
Patent Images
1. A passive infra-red sensor comprising:
- a housing including a mounting base and a lens mounting cover element;
detector support means;
an infrared detector mounted on the detector support means; and
a lens arranged for optical coupling to the infrared detector; and
lens mounting and locking retaining means arranged for snap fit engagement with said cover element, and which once inserted, can be removed only from the inside of the cover element and not from the outside thereof.
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Abstract
A passive infra-red sensor comprising a housing including a mounting base and a lens mounting cover element, detector support apparatus selectably positionable with respect to said mounting base along a first axis, an infra-red detector and a beam locator illuminator mounted on the detector support apparatus, a multi-faceted focusing lens including a first array of beam defining lenses arranged for optical coupling to the infra-red detector and a second array of beam defining lenses arranged for optical coupling to the beam locator illuminator.
65 Citations
17 Claims
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1. A passive infra-red sensor comprising:
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a housing including a mounting base and a lens mounting cover element; detector support means; an infrared detector mounted on the detector support means; and a lens arranged for optical coupling to the infrared detector; and lens mounting and locking retaining means arranged for snap fit engagement with said cover element, and which once inserted, can be removed only from the inside of the cover element and not from the outside thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A passive infra-red sensor comprising:
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a housing including a mounting base and a lens mounting cover element; detector support means, selectably positionable with respect to said mounting base along a first axis; an infrared detector mounted on the detector support means; a multi-faceted focusing lens; and lens mounting and locking means including first and second lens retaining members arranged for snap fit engagement with said cover element, whereby once inserted, they can be removed only from the inside of the cover element and not from the outside thereof. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A passive infra-red sensor comprising:
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a housing including a mounting base and a lens mounting cover element; detector support means, selectably positionable with respect to said mounting base along a first axis; an infrared detector mounted on said detector support means; a multi-faceted lens configured to define protection zones extending in directions both above and below the horizontal plane; and lens mounting and locking means including first and second lens retaining members arranged for snap fit engagement with said cover element, whereby once inserted, they can be removed only from the inside of the cover element and not from the outside thereof. - View Dependent Claims (14, 15, 16, 17)
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Specification