Patent US3709610A successfully refreshed from Google Patents.
US3709610A
Expired / Lapsed
US
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Method and apparatus for measuring and controlling the thickness of a filament or the like
Assignee: HOLOBEAM
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Filing: 1970-05-20
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Granted: 1973-01-09
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Expires: 1990-05-20
Abstract
Abstract A light beam, such as that obtained from a laser, is irradiated onto a fine filament of wire, yarn or the like to produce a diffraction pattern. The spacing between the light and dark portions of the diffraction pattern is measured to provide an indication of the diameter of the filament. Several means for measuring the diffraction pattern spacing are disclosed. Also disclosed is a method of utilizing an interference pattern produced by irradiating a sharp edge with a light beam, thereby to evaluate the edge sharpness.
Inventors
- 👤 H Kruegle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:33
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/08; G01B11/10; B; B65; B65H; B65H63/00; B65H63/06; B65H63/062; B65H63/065; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
Apparatus for measuring the diameter of a fine filament, wire, or the like comprising first laser means for irradiating the filament with a beam of light, first detecting means, scanning means for directing the diffraction pattern having alternating dark and light portions produced when said filament is irradiated by said beam to said first detecting means, signal averaging means having one input coupled to the output of said first detecting means, second laser means directing a beam onto said scanning means, and second detecting means for producing a timing signal when said beam from said second laser beam is reflected from said scanning means normally to said second detecting means, the output of said second detecting means being coupled to a second input of said signal averaging means.
Claim 2
Dependent Claim
128 words
Apparatus for measuring the diameter of a fine filament, wire, or the like comprising first laser means for irradiating the filament with a beam of light, first detecting means, scanning means for directing the diffraction pattern having alternating dark and light portions produced when said filament is irradiated by said beam to said first detecting means, signal averaging means having one input coupled to the output of said first detecting means, second laser means directing a beam onto said scanning means, and second detecting means for producing a timing signal when said beam from said second laser beam is reflected from said scanning means normally to said second detecting means, the output of said second detecting means being coupled to a second input of said signal averaging means.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, further comprising a plate having a narrow slit interposed between said scanning means and said first detecting means.
References Cited (Backward Citations)
US3518007A
Cited
US3503687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |