US3908079A
Expired / Lapsed
US
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Surface roughness measurement instrument
Assignee: Carboloy Inc
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Filing: 1974-02-15
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Granted: 1975-09-23
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Expires: 1994-02-15
Abstract
Abstract A surface roughness measuring instrument consists of an optical non-contacting system which focuses a thin light plane on the surface of a work specimen at an angle of about 45* with respect to the surface; a television camera focused onto the specimen surface at about the 45* reflected angle through the microscope camera port to provide a video signal corresponding to the topography of the surface; an analog converter connected to the video output to provide a modified light intensity signal and an analog signal; an oscilloscope connected to the analog signal to provide a visual signal monitor; and an arithmetic average analog computer connected to the analog signal.
Inventors
- 👤 Warren William Worthley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:45
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30; G01B11/303
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A system for determining the roughness of a surface comprising: a light-section microscope positioned to focus on the surface of a test specimen; a television camera focused on the specimen through said microscope to provide a video output corresponding to the surface topography of said specimen; a television signal to analog converter connected to said video output to provide a modified light intensity signal and an analog output signal; and an arithmetic average analog computer connected to said analog signal.
Claim 2
Independent Claim
80 words
A system for determining the roughness of a surface comprising: a light-section microscope positioned to focus on the surface of a test specimen; a television camera focused on the specimen through said microscope to provide a video output corresponding to the surface topography of said specimen; a television signal to analog converter connected to said video output to provide a modified light intensity signal and an analog output signal; and an arithmetic average analog computer connected to said analog signal.
Claim 3
Dependent Claim
29 words
A system as claimed in claim 1 wherein the light-section microscope includes an optical eyepiece and a camera port and the television camera is focused through said camera port.
Claim 4
Dependent Claim
27 words
A system as claimed in claim 1 wherein the television camera is disposed to make a perpendicular sweep with reference to the light plane of the microscope.
Claim 5
Dependent Claim
18 words
A system as claimed in claim 1 wherein a monitoring oscilloscope is connected to the light intensity signal.
Claim 6
Independent Claim
97 words
The method of determining the roughness of a surface which comprises; positioning a light-section microscope having a camera port with the light plane thereof focused on the surface of a test specimen from an angle of about 45*; focusing a television camera on said specimen through said camera port whereby said camera provides a video output corresponding to the surface topography of the test specimen; passing said video output through an analog converter to provide a modified analog signal; and passing said analog signal to an analog computer which computes an arithmetic average of said analog signal.
Claim 7
Independent Claim
97 words
The method of determining the roughness of a surface which comprises; positioning a light-section microscope having a camera port with the light plane thereof focused on the surface of a test specimen from an angle of about 45*; focusing a television camera on said specimen through said camera port whereby said camera provides a video output corresponding to the surface topography of the test specimen; passing said video output through an analog converter to provide a modified analog signal; and passing said analog signal to an analog computer which computes an arithmetic average of said analog signal.
Claim 8
Dependent Claim
22 words
The method of claim 5 wherein the television camera makes a perpendicular sweep with reference to the light plane of the microscope.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |