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US3661465A
Expired / Lapsed
US
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Method and an arrangement for recognizing an object or its position and orientation in space
Assignee: US Philips Corp
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Filing: 1969-02-06
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Granted: 1972-05-09
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Expires: 1989-02-06
Abstract
Abstract A method and apparatus for determining the positional changes in the surface of an object by recording a real image and speckle pattern produced by focusing the radiation scattered by the object from a coherent source, and by comparing the object with the recorded image and the resulting speckle pattern.
Inventors
- 👤 Gunther Groh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:52
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/88; G01S17/89; G01B; G01B11/00; G01H; G01H9/00; G01H9/002; G01S7/00; G01S7/02; G01S7/04; G01S7/41; G01S7/411; G01S7/412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A method of determining positional changes in the surface of an object, comprising exposing the object surface to coherent radiation to produce a speckle pattern, exposing a light image recording film directly and only to radiation scattered from said object surface to record said speckle pattern thereon, exposing the object a second time to the coherent radiation to produce a second speckle pattern, and comparing the intensity distribution of the recorded speckle pattern with that of the second speckle pattern from the object.
Claim 2
Independent Claim
83 words
A method of determining positional changes in the surface of an object, comprising exposing the object surface to coherent radiation to produce a speckle pattern, exposing a light image recording film directly and only to radiation scattered from said object surface to record said speckle pattern thereon, exposing the object a second time to the coherent radiation to produce a second speckle pattern, and comparing the intensity distribution of the recorded speckle pattern with that of the second speckle pattern from the object.
Claim 3
Dependent Claim
50 words
A method as claimed in claim 1, wherein the step of comparing the recorded speckle pattern with the second speckle pattern from the object comprises subtracting the recorded light intensity of the image from corresponding portions of the second speckle pattern from the object, and displaying the resultant intensity distribution.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 1, wherein the step of comparing the recorded speckle pattern with the second speckle pattern from the object comprises vibrating the object with an amplitude exceeding the positional measuring range.
Claim 5
Dependent Claim
56 words
A method as claimed in claim 1, wherein the step of comparing the recorded speckle pattern with the second speckle pattern from the object comprises moving the recorded pattern to a position where the amplitude of the cross-correlation function between the recorded speckle pattern and the second speckle pattern from the object is at a maximum.
Claim 6
Dependent Claim
55 words
A method as claimed in claim 1, wherein the step of recording the resultant speckle pattern comprises exposing a photographic emulsion to the speckle pattern, and wherein the step of comparing the recorded speckle pattern with the second speckle pattern from the object comprises imaging the object on the developed negative resulting from the exposure.
Claim 7
Independent Claim
102 words
A device for determining the positional changes in the surface of an object, comprising a source of coherent radiation, means for directing the radiation from the source to the object whereby the radiation is scattered from the object to produce a speckle pattern, a light image recording film located in a plane in space for directly receiving only the radiation scattered from the object, whereby the speckle pattern of the object is recorded on said film, and means for comparing the intensity distribution of the recorded speckle pattern with the intensity distribution of radiation scattered from the object at a later time.
Claim 8
Independent Claim
102 words
A device for determining the positional changes in the surface of an object, comprising a source of coherent radiation, means for directing the radiation from the source to the object whereby the radiation is scattered from the object to produce a speckle pattern, a light image recording film located in a plane in space for directly receiving only the radiation scattered from the object, whereby the speckle pattern of the object is recorded on said film, and means for comparing the intensity distribution of the recorded speckle pattern with the intensity distribution of radiation scattered from the object at a later time.
Claim 9
Dependent Claim
15 words
A device as claimed in claim 6, wherein the recording film is a photographic emulsion.
Claim 10
Dependent Claim
38 words
Apparatus as claimed in claim 7, wherein the means for comparing the recorded speckle pattern with the radiation scattered from the object comprises a photo-sensitive measuring device located on the side of the photographic emulsion opposite the object.
Claim 11
Dependent Claim
21 words
A device as claimed in claim 6, further comprising a periodic function on the surface of the object to be measured.
References Cited (Backward Citations)
US3388259A
Cited
US3490827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |