US3229564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflectometer
Assignee: Bausch and Lomb Inc
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Filing: 1961-05-12
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Granted: 1966-01-18
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Expires: 1981-05-12
Abstract
No abstract record available.
Inventors
- 👤 Robert J Meltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01N21/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A REFLECTOMETER COMPRISING A SLIT, A LIGHT SOURCE FOR ILLUMINATING SAID SLIT, AND AN OPTICAL SYSTEM INCLUDING AN OBJECTIVE LENS FOR IMAGING SAID SLIT UPON A SPECIMEN SURFACE IN A PLANE RELATIVELY CLOSE TO SAID OBJECTIVE LENS WHEREBY THE SLIT IMAGING LIGHT IS PARTLY SPECULARLY AND PARTLY DIFFUSELY REFLECTED FROM THE SPECIMEN SURFACE, A FIRST PHOTOSENSOR, A SECOND PHOTOSENSOR, AND A PELLICLE, SAID PELLICLE INCLUDING A REFLECTIVE PORTION SEPARATING SPECULARLY AND DIFFUSELY REFLECTED LIGHT, A FIRST SELECTED PORTION OF SAID OBJECTIVE LENS RETRODIRECTING THE SPECULARLY REFLECTED LIGHT FROM THE SPECIMEN SURFACE TOWARD SAID PELLICLE AND THE REFLECTIVE PORTION OF SAID PELLICLE DIRECTING THE RETRODIRECTED SPECULARLY REFLECTED LIGHT ON TO SAID FIRST PHOTOSENSOR, A SECOND SELECTED PORTION OF SAID OBJECTIVE LENS RETRODIRECTING DIFFUSELY REFLECTED LIGHT ON TO SAID SECOND PHOTOSENSOR, A MASK DISPOSED ON SAID OBJECTIVE LENS EXCLUDING SPECULARLY REFLECTED LIGHT FROM SAID SECOND PHOTOSENSOR, AND INDICATING MEANS RESPONSIVE TO THE OUTPUT OF SAID PHOTOSENSORS.
Claim 2
Dependent Claim
154 words
A REFLECTOMETER COMPRISING A SLIT, A LIGHT SOURCE FOR ILLUMINATING SAID SLIT, AND AN OPTICAL SYSTEM INCLUDING AN OBJECTIVE LENS FOR IMAGING SAID SLIT UPON A SPECIMEN SURFACE IN A PLANE RELATIVELY CLOSE TO SAID OBJECTIVE LENS WHEREBY THE SLIT IMAGING LIGHT IS PARTLY SPECULARLY AND PARTLY DIFFUSELY REFLECTED FROM THE SPECIMEN SURFACE, A FIRST PHOTOSENSOR, A SECOND PHOTOSENSOR, AND A PELLICLE, SAID PELLICLE INCLUDING A REFLECTIVE PORTION SEPARATING SPECULARLY AND DIFFUSELY REFLECTED LIGHT, A FIRST SELECTED PORTION OF SAID OBJECTIVE LENS RETRODIRECTING THE SPECULARLY REFLECTED LIGHT FROM THE SPECIMEN SURFACE TOWARD SAID PELLICLE AND THE REFLECTIVE PORTION OF SAID PELLICLE DIRECTING THE RETRODIRECTED SPECULARLY REFLECTED LIGHT ON TO SAID FIRST PHOTOSENSOR, A SECOND SELECTED PORTION OF SAID OBJECTIVE LENS RETRODIRECTING DIFFUSELY REFLECTED LIGHT ON TO SAID SECOND PHOTOSENSOR, A MASK DISPOSED ON SAID OBJECTIVE LENS EXCLUDING SPECULARLY REFLECTED LIGHT FROM SAID SECOND PHOTOSENSOR, AND INDICATING MEANS RESPONSIVE TO THE OUTPUT OF SAID PHOTOSENSORS.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |