US3087377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarized light autocollimator
Assignee: Barnes Engineering Co
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Filing: 1960-07-07
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Granted: 1963-04-30
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Expires: 1980-07-07
Abstract
No abstract record available.
Inventors
- 👤 William J Daley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A POLARIZED LIGHT PHOTOELECTRIC AUTOCOLLIMATOR COMPRISING IN OPTICAL ALIGNMENT A LIGHT SOURCE, POLARIZING MEANS, A BEAM SPLITTER CAPABLE OF REFLECTING A PORTION OF THE POLARIZED LIGHT BEAM, COLLIMATING MEANS IN THE REFLECTED BEAM FOR PRODUCING A COLLIMATED BEAM CAPABLE OF BEING AIMED AT A REFLECTING ELEMENT THE ROTATIONAL DISPLACEMENT OF WHICH ABOUT AN AXIS AT RIGHT ANGLES TO THE BEAM STRIKING IT IS TO BE MEASURED, A SPLIT FIELD ANALYZER IN THE IMAGE PLANE OF THE COLLIMATING MEANS AND A PHOTOELECTRIC DETECTOR, THE IMPROVEMENT WHICH COMPRISES (A) CIRCULARLY POLARIZING MEANS IN THE BEAM FROM THE LIGHT SOURCE TO THE BEAM SPLITTER, AND (B) A ROTATING QUARTER WAVE PLATE FOR THE BAND OF LIGHT USED BETWEEN THE BEAM SPLITTER AND THE SPLIT FIELD ANALYZER WHEREBY THE CIRCULARLY POLARIZED BEAM REFLECTED BACK FROM THE REFLECTING ELEMENT IS TRANSFORMED INTO SUBSTANTIALLY PLANE POLARIZED LIGHT, THE PLANE OF POLARIZATION OF WHICH ROTATES.
Claim 2
Dependent Claim
149 words
IN A POLARIZED LIGHT PHOTOELECTRIC AUTOCOLLIMATOR COMPRISING IN OPTICAL ALIGNMENT A LIGHT SOURCE, POLARIZING MEANS, A BEAM SPLITTER CAPABLE OF REFLECTING A PORTION OF THE POLARIZED LIGHT BEAM, COLLIMATING MEANS IN THE REFLECTED BEAM FOR PRODUCING A COLLIMATED BEAM CAPABLE OF BEING AIMED AT A REFLECTING ELEMENT THE ROTATIONAL DISPLACEMENT OF WHICH ABOUT AN AXIS AT RIGHT ANGLES TO THE BEAM STRIKING IT IS TO BE MEASURED, A SPLIT FIELD ANALYZER IN THE IMAGE PLANE OF THE COLLIMATING MEANS AND A PHOTOELECTRIC DETECTOR, THE IMPROVEMENT WHICH COMPRISES (A) CIRCULARLY POLARIZING MEANS IN THE BEAM FROM THE LIGHT SOURCE TO THE BEAM SPLITTER, AND (B) A ROTATING QUARTER WAVE PLATE FOR THE BAND OF LIGHT USED BETWEEN THE BEAM SPLITTER AND THE SPLIT FIELD ANALYZER WHEREBY THE CIRCULARLY POLARIZED BEAM REFLECTED BACK FROM THE REFLECTING ELEMENT IS TRANSFORMED INTO SUBSTANTIALLY PLANE POLARIZED LIGHT, THE PLANE OF POLARIZATION OF WHICH ROTATES.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |