Patent US3402631A successfully refreshed from Google Patents.
US3402631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized light reflectometer
Assignee: United States Department of the Navy
•
Filing: 1964-11-16
•
Granted: 1968-09-24
•
Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Roy F Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:38
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/21; G01N21/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A REFLECTOMETER FOR MEASURING THE RATIO OF REFLECTANCES OF BEAMS OF RADIANT ENERGY FROM OPTICAL SPECULAR SUFACES LINEARLY POLARIZED PARALLEL AND PERPENDICULAR TO THE PLANE OF INCIDENCCE, COMPRISING: (A) A FIXED SOURCE OF RADIANT ENERGY FOR PROVIDING A COLLIMATED BEAM OF LIGHT, (B) A FIXED POLARIZING MEANS, (C) A FIXED DETECTOR MEANS, (D) FIRST AND SECOND ROTATING MEANS WHOSE AXES OF ROTATION ARE PARALLEL TO EACH OTHER, (E) FIRST, SECOND AND THIRD MIRRORS, (F) SAID FIRST AND SECOND MIRRORS MOUNTED ON SAID FIRST ROTATING MEANS EACH AT AN ANGLE OF 45 DEGREES WITH THE AXIS OF ROTATION OF SAID FIRST ROTATING MEANS AND AT 90 DEGREES TO EACH OTHER, (G) A SAMPLE MATERIAL WHOSE OPTICAL CONSTANT IS TO BE DETERMINED AND SAID THIRD MIRROR BEING MOUNTED IN THE SAME PLANE ON SAID SECOND ROTATING MEANS FOR ROTATION ABOUT THE AXIS OF ROTATION. (H) MEANS LINKING SAID FIRST AND SECOND ROTATING MEANS FOR SIMULTANEOUSLY ROTATING SAID FIRST AND SECOND MIRRORS ON SAID FIRST ROTATING MEANS AT TWICE THE ANGULAR RATE AS SAID SAMPLE AND THIRD MIRROR ARE ROTATED ON SAID SECOND ROTATING MEANS, (I) SAID SAMPLE BEING SET AT AN ANGLE OF INCIDENCE WITH RESPECT TO A BEAM OF RADIANT ENERGY FROM SAID FIXED SOURCE SUCH THAT THE RADIANT ENERGY BEAM REFLECTED FROM THE SAMPLE AT AN ANGLE EQUAL TO SAID ANGLE OF
Claim 2
Dependent Claim
222 words
A REFLECTOMETER FOR MEASURING THE RATIO OF REFLECTANCES OF BEAMS OF RADIANT ENERGY FROM OPTICAL SPECULAR SUFACES LINEARLY POLARIZED PARALLEL AND PERPENDICULAR TO THE PLANE OF INCIDENCCE, COMPRISING: (A) A FIXED SOURCE OF RADIANT ENERGY FOR PROVIDING A COLLIMATED BEAM OF LIGHT, (B) A FIXED POLARIZING MEANS, (C) A FIXED DETECTOR MEANS, (D) FIRST AND SECOND ROTATING MEANS WHOSE AXES OF ROTATION ARE PARALLEL TO EACH OTHER, (E) FIRST, SECOND AND THIRD MIRRORS, (F) SAID FIRST AND SECOND MIRRORS MOUNTED ON SAID FIRST ROTATING MEANS EACH AT AN ANGLE OF 45 DEGREES WITH THE AXIS OF ROTATION OF SAID FIRST ROTATING MEANS AND AT 90 DEGREES TO EACH OTHER, (G) A SAMPLE MATERIAL WHOSE OPTICAL CONSTANT IS TO BE DETERMINED AND SAID THIRD MIRROR BEING MOUNTED IN THE SAME PLANE ON SAID SECOND ROTATING MEANS FOR ROTATION ABOUT THE AXIS OF ROTATION. (H) MEANS LINKING SAID FIRST AND SECOND ROTATING MEANS FOR SIMULTANEOUSLY ROTATING SAID FIRST AND SECOND MIRRORS ON SAID FIRST ROTATING MEANS AT TWICE THE ANGULAR RATE AS SAID SAMPLE AND THIRD MIRROR ARE ROTATED ON SAID SECOND ROTATING MEANS, (I) SAID SAMPLE BEING SET AT AN ANGLE OF INCIDENCE WITH RESPECT TO A BEAM OF RADIANT ENERGY FROM SAID FIXED SOURCE SUCH THAT THE RADIANT ENERGY BEAM REFLECTED FROM THE SAMPLE AT AN ANGLE EQUAL TO SAID ANGLE OF
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |