Patent US1699837A successfully refreshed from Google Patents.
US4127778A
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US
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Optical correlator
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1977-01-14
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Granted: 1978-11-28
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Expires: 1997-01-14
Abstract
Abstract The invention relates to an optical correlator comprising an optical system for imaging an object space, a spatial frequency filter disposed in or close by the image plane, and at least one photoelectric detector assigned to said spatial frequency filter. According to the invention the spatial frequency filter is a raster, the structures of which extend in the direction of the perspective vanishing lines of the image of the object space and/or perpendicularly to at least one of said vanishing lines. The size of the structure elements and/or the distance between the elements constituting the raster structure are chosen according to the distortion of the perspective image.
Inventors
- 👤 Ludwig Leitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:39
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G01; G01P; G01P13/00; G01P3/00; G01P3/36; G01P3/64; G01P3/80; G01P3/806; G02B26/00; G02B26/002
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in said direction of the vanishing lines of the image of the object space, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 2
Dependent Claim
98 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in said direction of the vanishing lines of the image of the object space, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 3
Dependent Claim
32 words
An optical correlator as defined in claim 1, wherein said width of the structure elements and the distance between the structure elements vary in accordance with the distortion of the perspective image.
Claim 4
Dependent Claim
99 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in said direction of the vanishing lines of the image of the object space, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 5
Dependent Claim
99 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in said direction of the vanishing lines of the image of the object space, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 6
Dependent Claim
32 words
An optical correlator as defined in claim 3, wherein the width of the structure elements and said distance between the structure elements vary in accordance with the distortion of the perspective image.
Claim 7
Dependent Claim
103 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in a direction perpendicular to at least one of said vanishing lines of the image of the object space, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 8
Dependent Claim
103 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in a direction perpendicular to at least one of said vanishing lines of the image of the object space, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 9
Dependent Claim
32 words
An optical correlator as defined in claim 5, wherein said width of the structure elements and the distance between the structure elements vary in accordance with the distortion of the perspective image.
Claim 10
Dependent Claim
104 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in a direction perpendicular to at least one of said vanishing lines of the image of the object space, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 11
Dependent Claim
104 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements which extend in a direction perpendicular to at least one of said vanishing lines of the image of the object space, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 12
Dependent Claim
32 words
An optical correlator as defined in claim 7, wherein the width of the structure elements and said distance between the structure elements vary in accordance with the distortion of the perspective image.
Claim 13
Dependent Claim
128 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements with a first part of said structure elements which extends in the direction of said vanishing lines of the image of the object space and a second part of said structure elements which extends in a direction perpendicularly to at least one of said vanishing lines, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 14
Dependent Claim
128 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements with a first part of said structure elements which extends in the direction of said vanishing lines of the image of the object space and a second part of said structure elements which extends in a direction perpendicularly to at least one of said vanishing lines, said structure elements having a width which varies in accordance with the distortion of the perspective image.
Claim 15
Dependent Claim
32 words
An optical correlator as defined in claim 9, wherein said width of the structure elements and the distance between the structure elements vary in accordance with the distortion of the perspective image.
Claim 16
Dependent Claim
129 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements with a first part of said structure elements which extends in the direction of said vanishing lines of the image of the object space and a second part of said structure elements which extends in a direction perpendicularly to at least one of said vanishing lines, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 17
Dependent Claim
129 words
An optical correlator having an imaging optic for imaging an object space having lines vanishing in the direction of the horizon into an image plane and a spatial frequency filter arranged substantially in said image plane and at least one photoelectric detector assigned to said spatial frequency filter, wherein the improvement comprises: said spatial frequency filter in the form of a raster having structure elements with a first part of said structure elements which extends in the direction of said vanishing lines of the image of the object space and a second part of said structure elements which extends in a direction perpendicularly to at least one of said vanishing lines, said structure elements having a distance therebetween which varies in accordance with the distortion of the perspective image.
Claim 18
Dependent Claim
32 words
An optical correlator as defined in claim 11, wherein the width of the structure elements and said distance between the structure elements vary in accordance with the distortion of the perspective image.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |