Patent US3610936A successfully refreshed from Google Patents.
US3610936A
Expired / Lapsed
US
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Apparatus for determining the position of a discrete target occurring within a field of view
Assignee: Boeing North American Inc
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Filing: 1969-03-20
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Granted: 1971-10-05
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Expires: 1989-03-20
Abstract
Abstract In a radiant energy-sensing system, means for determining the position of a discrete target sensed within a field of view of said system and comprising a wedge-shaped reticle having mutually parallel, uniformly spaced, alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof for modulation of said field of view. There is also provided means responsive to the time-phase occurrence of said modulations for indicating an angular position of said target within said field of view, and means responsive to the number of modulations per reticle cycle for indicating the radial position of said target in said field of view relative to said apex.
Inventors
- 👤 David L Fried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:50
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/787
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
In a radiant energy target detection system having a field of view, a fixed geometry wedge-shaped reticle having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being mounted for rotation in the plane thereof and about the apex thereof to produce modulation of said field of view; and means responsive to said modulation to provide indications of a two-dimensional polar coordinate position of a sensed discrete radiant energy target within said field of view.
Claim 2
Dependent Claim
87 words
In a radiant energy target detection system having a field of view, a fixed geometry wedge-shaped reticle having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being mounted for rotation in the plane thereof and about the apex thereof to produce modulation of said field of view; and means responsive to said modulation to provide indications of a two-dimensional polar coordinate position of a sensed discrete radiant energy target within said field of view.
Claim 3
Dependent Claim
128 words
A radiant energy sensor system having a field of view and comprising a fixed geometry-shaped reticle interposed within the optical path of said field of view and having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof at a preselected angular velocity to produce modulations of said field of view; and means responsive to the time-phase occurrence of said modulation for indicating an angular position of said target within said field of view; and means responsive to the number of modulations per reticle cycle for indicating the radial position of said target in said field of view, relative to said reticle apex.
Claim 4
Dependent Claim
128 words
A radiant energy sensor system having a field of view and comprising a fixed geometry-shaped reticle interposed within the optical path of said field of view and having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof at a preselected angular velocity to produce modulations of said field of view; and means responsive to the time-phase occurrence of said modulation for indicating an angular position of said target within said field of view; and means responsive to the number of modulations per reticle cycle for indicating the radial position of said target in said field of view, relative to said reticle apex.
Claim 5
Dependent Claim
101 words
A radiant energy sensor system having a field of view and comprising a fixed geometry-shaped reticle interposed within the optical path of said field of view and having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof at a preselected angular velocity to produce modulations of said field of view, and means responsive to said modulations for indicating a two-dimensional polar coordinate position within said field of view of a detected discrete radiant energy source.
Claim 6
Dependent Claim
101 words
A radiant energy sensor system having a field of view and comprising a fixed geometry-shaped reticle interposed within the optical path of said field of view and having mutually parallel alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof at a preselected angular velocity to produce modulations of said field of view, and means responsive to said modulations for indicating a two-dimensional polar coordinate position within said field of view of a detected discrete radiant energy source.
Claim 7
Dependent Claim
82 words
The device of claim 3 in which said means responsive to said modulations comprises a first plurality of means to provide indications indicative of the occurrence of a sensed target in each of successive ones of preselected radial sectors of a field of view and a second plurality of means, each in cooperation with a mutually exclusive one of said first plurality of means for indicating a target polar angle of position associated with an associated one of said preselected radial sectors.
Claim 8
Dependent Claim
111 words
The device of claim 3 in which said means responsive to said modulations is adapted to provide indications indicative of a plurality of discrete radiant energy targets and comprises a plurality of narrow band-pass filters of progressively different center frequencies and commonly coupled to said modulated output of said system; a like plurality of pulse counters as filters; and a like plurality of phase detectors as filter, said phase detectors and counters being connected as sets, each set including a mutually exclusive one of said counters and of said detectors, a set of a counter and phase detector being coupled to an associated one of said filters by thresholded detector means.
Claim 9
Dependent Claim
123 words
In a radiant energy-sensing system, means for determining the position of a discrete target sensed within a field of view of said system and comprising a wedge-shaped reticle having mutually parallel, uniformly spaced, alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, Said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof for modulation of said field of view; means responsive to the time-phase occurrence of said modulation for indicating an angular position of said target within said field of view; and means responsive to the number of modulations per reticle cycle for indicating the radial position of said target in said field of view relative to said apex.
Claim 10
Dependent Claim
123 words
In a radiant energy-sensing system, means for determining the position of a discrete target sensed within a field of view of said system and comprising a wedge-shaped reticle having mutually parallel, uniformly spaced, alternate masking and nonmasking strips, all said strips commonly parallel to a radial edge of said reticle, Said reticle being rotatably mounted for rotation in the plane thereof and about the apex thereof for modulation of said field of view; means responsive to the time-phase occurrence of said modulation for indicating an angular position of said target within said field of view; and means responsive to the number of modulations per reticle cycle for indicating the radial position of said target in said field of view relative to said apex.
Claim 11
Dependent Claim
27 words
The device of claim 7 in which said nonmasking strips comprise uniformly spaced photoconductive regions, said masking strips comprising electrically conductive strips commonly connected in electrical circuit.
Claim 12
Dependent Claim
37 words
The device of claim 7 in which said means responsive to said modulations is responsively connected in electric circuit with said reticle for indicating the position in said field of view of a discrete radiant energy target.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |