US3900738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-contact measuring gauge
Assignee: Lockheed Martin Corp
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Filing: 1973-05-23
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Granted: 1975-08-19
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Expires: 1993-05-23
Abstract
Abstract A non-coherent light source is used to measure the position of an object. Two photodetector systems are used and the object to be measured is allowed to partially block the light impinging on one of the photodetector systems. The difference between the output from the two photodetector systems represents the position of the object.
Inventors
- 👤 Sr Russell M Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:02
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/10; G01V8/20; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/342
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
In a non-contact measuring gauge the improvement comprising: a base comprising an elongated flat member, means for producing a non-coherent light rigidly affixed to said base, a detector housing rigidly affixed to said base, said detector housing including a face plate defining a first aperture and a second aperture, a first detector mounted within said detector housing aligned with said first aperture, a second detector mounted within said detector housing aligned with said second aperture, a first lens system and a second lens system coaxially mounted between said means for producing non-coherent light and said first detector and said second detector respectively for focusing said non-coherent light on said detectors, said first and second detector positioned equal radial distance from said non-coherent light means and aligned to simultaneously receiving radiation from said non-coherent light means, whereby said detectors generate an output in response to and proportional to the non-coherent light impinging on said detectors.
Claim 2
Dependent Claim
154 words
In a non-contact measuring gauge the improvement comprising: a base comprising an elongated flat member, means for producing a non-coherent light rigidly affixed to said base, a detector housing rigidly affixed to said base, said detector housing including a face plate defining a first aperture and a second aperture, a first detector mounted within said detector housing aligned with said first aperture, a second detector mounted within said detector housing aligned with said second aperture, a first lens system and a second lens system coaxially mounted between said means for producing non-coherent light and said first detector and said second detector respectively for focusing said non-coherent light on said detectors, said first and second detector positioned equal radial distance from said non-coherent light means and aligned to simultaneously receiving radiation from said non-coherent light means, whereby said detectors generate an output in response to and proportional to the non-coherent light impinging on said detectors.
Claim 3
Dependent Claim
30 words
A non-contact measuring gauge according to claim 1 wherein said means for producing a non-coherent light is a light emitting diode and said first and second detector means are photo-detectors.
Claim 4
Dependent Claim
16 words
A non-contact measuring gauge according to claim 2 wherein said first and second apertures are rectangular.
Claim 5
Dependent Claim
39 words
A non-contact measuring gauge according to claim 3 including a first elongated cylindrical light shield coaxial with said first aperture and a second elongated cylindrical light shield coaxial with said second aperture for shielding said detectors from spuriouS light.
Claim 6
Dependent Claim
192 words
A detection system for simultaneously receiving non-coherent light from a single source comprising: means for producing a non-coherent light, a first photodetector system mounted to receive radiation from said non-coherent light producing means, said first photodetector system comprising in coaxial optical alignment a first photodetector, a first cylindrical light shield disposed between said means for producing a non-coherent light and said first photodetector, and a face plate defining a first rectangular aperture for passing only a rectangular shaped light image to said first photodetector, a second photodetector system mounted to receive radiation from said non-coherent light producing means, said second photodetector system comprising in coaxial optical alignment a second photodetector, a second cylindrical light shield disposed between said means for producing a non-coherent light and said second photodetector so as to restrict incident light from striking said photodetector, and a face plate defining a second aperture for passing only a rectangular shaped light image to said second photodetector, and wherein said first and second photodetectors are positioned equal radial distance from said non-coherent light means, whereby said first and second photodetectors generate outputs response to the non-coherent light impinging on said detectors.
Claim 7
Dependent Claim
192 words
A detection system for simultaneously receiving non-coherent light from a single source comprising: means for producing a non-coherent light, a first photodetector system mounted to receive radiation from said non-coherent light producing means, said first photodetector system comprising in coaxial optical alignment a first photodetector, a first cylindrical light shield disposed between said means for producing a non-coherent light and said first photodetector, and a face plate defining a first rectangular aperture for passing only a rectangular shaped light image to said first photodetector, a second photodetector system mounted to receive radiation from said non-coherent light producing means, said second photodetector system comprising in coaxial optical alignment a second photodetector, a second cylindrical light shield disposed between said means for producing a non-coherent light and said second photodetector so as to restrict incident light from striking said photodetector, and a face plate defining a second aperture for passing only a rectangular shaped light image to said second photodetector, and wherein said first and second photodetectors are positioned equal radial distance from said non-coherent light means, whereby said first and second photodetectors generate outputs response to the non-coherent light impinging on said detectors.
Claim 8
Dependent Claim
20 words
A detection system according to claim 5 wherein said means for producing a non-coherent light is a light emitting diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |