US3436159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal reflection element for spectroscopy with film optical cavity to enhance absorption
Assignee: Bausch and Lomb Inc
•
Filing: 1966-02-04
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Granted: 1969-04-01
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Expires: 1986-02-04
Abstract
No abstract record available.
Inventors
- 👤 Nicolas J Harrick
- 👤 Arthur F Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:16
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01N21/552
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
AN INTERNAL REFLECTION ELEMENT FOR USE IN INTERNAL REFLECTION SPECTROSCOPY, COMPRISING A SUBSTANTIALLY RADIATION TRANSPARENT BODY HAVING A RELATIVELY HIGH INDEX OF REFRACTION, A FRUSTRATED TOTAL REFLECTION FILM HAVING A RELATIVELY LOW INDEX OF REFRACTION ON A SURFACE PORTION OF SAID BODY, AND AN INTERFERENCE FILM HAVING A RELATIVELY HIGH INDEX OF REFRACTION ON THE FRUSTRATED TOTAL REFLECTION FILM, SAID BODY BEING POSITIONED TO RECEIVE A BEAM OF RADIATION AND IMPINGE SAME THROUGH THE FRUSTRATED TOTAL REFLECTION FILM AND THE INTERFERENCE FILM ON THE OUTER SURFACE OF THE LATTER AT AN ANGLE EXCEEDING THE CRITICAL ANGLE SO AS TO CAUSE SAID BEAM TO BE TOTALLY REFLECTED FROM THAT OUTER SURFACE EXCEPT AS ATTENUATED BY THE PRESENCE OF AN ABSORBING MEDIUM ON SAID OUTER SURFACE SAID FRUSTRATED TOTAL REFLECTION FILM HAVING CHARACTERISTICS, INCLUDING THICKNESS, FOR PRODUCING SUBSTANTIAL AMPLITUDE MATCHING OF BEAM COMPONENTS, AND SAID INTERFERENCE FILM HAVING CHARACTERISTICS, INCLUDING THICKNESS, FOR PRODUCING SUBSTANTIAL PHASE MATCHING OF SAID BEAM COMPONENTS.
Claim 2
Dependent Claim
158 words
AN INTERNAL REFLECTION ELEMENT FOR USE IN INTERNAL REFLECTION SPECTROSCOPY, COMPRISING A SUBSTANTIALLY RADIATION TRANSPARENT BODY HAVING A RELATIVELY HIGH INDEX OF REFRACTION, A FRUSTRATED TOTAL REFLECTION FILM HAVING A RELATIVELY LOW INDEX OF REFRACTION ON A SURFACE PORTION OF SAID BODY, AND AN INTERFERENCE FILM HAVING A RELATIVELY HIGH INDEX OF REFRACTION ON THE FRUSTRATED TOTAL REFLECTION FILM, SAID BODY BEING POSITIONED TO RECEIVE A BEAM OF RADIATION AND IMPINGE SAME THROUGH THE FRUSTRATED TOTAL REFLECTION FILM AND THE INTERFERENCE FILM ON THE OUTER SURFACE OF THE LATTER AT AN ANGLE EXCEEDING THE CRITICAL ANGLE SO AS TO CAUSE SAID BEAM TO BE TOTALLY REFLECTED FROM THAT OUTER SURFACE EXCEPT AS ATTENUATED BY THE PRESENCE OF AN ABSORBING MEDIUM ON SAID OUTER SURFACE SAID FRUSTRATED TOTAL REFLECTION FILM HAVING CHARACTERISTICS, INCLUDING THICKNESS, FOR PRODUCING SUBSTANTIAL AMPLITUDE MATCHING OF BEAM COMPONENTS, AND SAID INTERFERENCE FILM HAVING CHARACTERISTICS, INCLUDING THICKNESS, FOR PRODUCING SUBSTANTIAL PHASE MATCHING OF SAID BEAM COMPONENTS.
References Cited (Backward Citations)
US3240111A
Cited
US3308709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |