Patent US3900262A successfully refreshed from Google Patents.
US3900262A
Expired / Lapsed
US
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Optical velocity measuring apparatus
Assignee: BAE Systems Electronics Ltd
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Filing: 1972-10-25
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Granted: 1975-08-19
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Expires: 1992-10-25
Abstract
Abstract Optical velocity measuring apparatus in which a set of elemental reflecting elements view a different spaced portion of the line of travel of an object each element directing light from its respective portion onto a common photo-sensitive device to provide an electrical output which includes a spectral component of modulation dependent on the velocity of an object travelling along the line.
Inventors
- 👤 Ivor Renton Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
An apparatus for optically measuring the velocity along a particular line of travel of a moving object and providing therefrom an electrical output which includes a spectral component of modulation dependent upon said velocity in which there is provided a set of elemental reflecting elements each arranged to view a different spaced portion of said line of travel to provide an effective optical grating in space along said line and a common photo-sensitive device arranged to receive light from each of said reflecting elements via an aperture common to all of the elements in said set and to provide therefrom said electrical output.
Claim 2
Independent Claim
103 words
An apparatus for optically measuring the velocity along a particular line of travel of a moving object and providing therefrom an electrical output which includes a spectral component of modulation dependent upon said velocity in which there is provided a set of elemental reflecting elements each arranged to view a different spaced portion of said line of travel to provide an effective optical grating in space along said line and a common photo-sensitive device arranged to receive light from each of said reflecting elements via an aperture common to all of the elements in said set and to provide therefrom said electrical output.
Claim 3
Dependent Claim
28 words
An apparatus as claimed in claim 1 and wherein said individual reflecting elements are each part cylindrical mirrors, the whole arrangement being such that for each reflective element
Claim 4
Dependent Claim
33 words
An apparatus as claimed in claim 1 and wherein at least some of the individual reflective elements are aligned on a common plane perpendicular to the planes of incident light on the elements.
Claim 5
Dependent Claim
69 words
An aparatus as claimed in claim 1 and wherein each element is inclined at an angle which is greater than that of one adjacent element while less than that of anothher adjacent element and wherein some of said elements depart from a common plane perpendicular to the planes of incident light on said elements to an increasing extent so as to provide optimum reflective light to said photo-sensitive device.
Claim 6
Dependent Claim
37 words
An apparatus as claimed in claim 1 and wherein two sets of reflective elements are provided each forming one half portion of a dish and each directing light to a common photo-sensitive device individual to that set.
Claim 7
Dependent Claim
127 words
Apparatus for measuring reLative velocity between the apparatus and an object along a line in a plane containing the object and remote from the apparatus, comprising in combination: photosensitive means for producing an electrical output signal in response to fluctuations in intensity of light incident thereon; reflective means for focussing light toward said photosensitive means and comprising a number of discrete concave reflective surface portions oriented to view successive segments along said line; and means defining an aperture adjacent said photosensitive means and between said photosensitive means and said reflective means for cooperating with said reflective means to produce an effective optical grating along said line in said plane whereby said electrical output signal is dependent upon relative movement between said effective optical grating and an object.
Claim 8
Dependent Claim
127 words
Apparatus for measuring reLative velocity between the apparatus and an object along a line in a plane containing the object and remote from the apparatus, comprising in combination: photosensitive means for producing an electrical output signal in response to fluctuations in intensity of light incident thereon; reflective means for focussing light toward said photosensitive means and comprising a number of discrete concave reflective surface portions oriented to view successive segments along said line; and means defining an aperture adjacent said photosensitive means and between said photosensitive means and said reflective means for cooperating with said reflective means to produce an effective optical grating along said line in said plane whereby said electrical output signal is dependent upon relative movement between said effective optical grating and an object.
Claim 9
Dependent Claim
18 words
Apparatus as defined in claim 6 wherein said reflective means comprises a set of part cylindrical reflective surfaces.
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) | 1978-08-18 | 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 |