US3794427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical profile detector whose function is not adversely affected by surface conditions of strip-shaped member
Assignee: Hamamatsu TV Co Ltd
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Filing: 1972-06-06
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Granted: 1974-02-26
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Expires: 1992-06-06
Abstract
Abstract An optical profile detector is provided in which a light pattern projected upon the surface of a specimen is varied depending upon the profile of the specimen; and the projected light image is scanned into electrical signals which in turn are shaped into pulses so that the deviations in profile of the specimen from the standards may be detected from the deviations of the time intervals between the pulses from a predetermined time interval.
Inventors
- 👤 H Shibata
- 👤 M Okabe
- 👤 T Santo
- 👤 T Emori
- 👤 K Kurasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:36
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
An optical profile detector whose function is not adversely affected by the surface conditions of a strip-shaped member comprising means for projecting a light pattern upon the surface of a member to be detected, said projected light pattern changing its profile depending upon the variations in profile of said member to be detected, means for scanning transversely said projected light pattern and for producing video signals therefrom, a detecting circuit for detecting the brightest point from the video signals obtained from each scanning by said scanning means, sampling lines and a line selector circuit for obtaining the profile of points in the transverse direction of said member to be detected, a linear voltage time base generator, and a deviation detecting circuit to which are applied the output and pulses from said sampling lines and said selector circuit through said linear voltage time-base generator.
Claim 2
Dependent Claim
143 words
An optical profile detector whose function is not adversely affected by the surface conditions of a strip-shaped member comprising means for projecting a light pattern upon the surface of a member to be detected, said projected light pattern changing its profile depending upon the variations in profile of said member to be detected, means for scanning transversely said projected light pattern and for producing video signals therefrom, a detecting circuit for detecting the brightest point from the video signals obtained from each scanning by said scanning means, sampling lines and a line selector circuit for obtaining the profile of points in the transverse direction of said member to be detected, a linear voltage time base generator, and a deviation detecting circuit to which are applied the output and pulses from said sampling lines and said selector circuit through said linear voltage time-base generator.
Claim 3
Dependent Claim
160 words
An optical profile detector whose function is not adversely affected by the surface conditions of a strip-shaped member, comprising means for projecting a light pattern upon the surface of a member to be detected, said projected light pattern changing its profile depending upon the variations in profile of said member to be detected, means for transversely scanning said projected lignt pattern and for producing video signals therefrom, a detecting circuit for detecting the brightest point from the video signals obtained from each scanning by said scanning means, a pulse generator for generating pulses in response to the brightest points detected by said detecting circuit, sampling lines and a line selector circuit for obtaining the profile of points in the transverse direction of said member to be detected, a linear voltage time base generator, and a deviation detecting circuit to which are applied the output and pulses from said sampling lines and said selector circuit through said linear voltage time-base generator.
Claim 4
Dependent Claim
160 words
An optical profile detector whose function is not adversely affected by the surface conditions of a strip-shaped member, comprising means for projecting a light pattern upon the surface of a member to be detected, said projected light pattern changing its profile depending upon the variations in profile of said member to be detected, means for transversely scanning said projected lignt pattern and for producing video signals therefrom, a detecting circuit for detecting the brightest point from the video signals obtained from each scanning by said scanning means, a pulse generator for generating pulses in response to the brightest points detected by said detecting circuit, sampling lines and a line selector circuit for obtaining the profile of points in the transverse direction of said member to be detected, a linear voltage time base generator, and a deviation detecting circuit to which are applied the output and pulses from said sampling lines and said selector circuit through said linear voltage time-base generator.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |