Patent US4699472A successfully refreshed from Google Patents.
US4699472A
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Polarization controlling device and method
Assignee: United States Department of the Army
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Filing: 1986-02-21
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Granted: 1987-10-13
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Expires: 2006-02-21
Abstract
Abstract An unpolarized light beam is split into two orthogonal polarized beams. Each polarized beam is attenuated by passing it through the sequence of a first polarization rotator, an analyzer, and a second polarization rotator. The attenuated beams are combined to yield a beam with the desired type or space-orientation of polarization.
Inventors
- 👤 Aubrey J. Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:17
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0322; G02B; G02B5/00; G02B5/30; G02B5/3083
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A device for generating a light beam of a particular polarization from an unpolarized beam of light wherein said device includes: means for separating said unpolarized beam into two polarized beams with orthogonal polarizations; means for adjusting the relative amplitudes of said polarized beams; and means for combining said adjusted beams, wherein said means for adjusting includes: individual means for rotating the polarization of each polarized beam by a desired amount; individual analyzers for each of said rotated polarized beams; and individual means for negating the polarization rotation of said beams by said means for rotating.
Claim 2
Independent Claim
96 words
A device for generating a light beam of a particular polarization from an unpolarized beam of light wherein said device includes: means for separating said unpolarized beam into two polarized beams with orthogonal polarizations; means for adjusting the relative amplitudes of said polarized beams; and means for combining said adjusted beams, wherein said means for adjusting includes: individual means for rotating the polarization of each polarized beam by a desired amount; individual analyzers for each of said rotated polarized beams; and individual means for negating the polarization rotation of said beams by said means for rotating.
Claim 3
Independent Claim
113 words
A device for generating a light beam of a particular polarization from an unpolarized beam of light wherein said device includes: means for separating said unpolarized beam into two polarized beams with orthogonal polarizations; means for adjusting the relative amplitudes of said polarized beams; and means for combining said adjusted beams, wherein said means for adjusting includes means for attenuating either or both of said polarized beams, and wherein said means for attenuating comprises: individual means for rotating the polarization of each polarized beam by a desired amount; individual analyzers for each of said rotated polarized beams; and individual means for negating the polarization rotation of said beams by said means for rotating.
Claim 4
Independent Claim
113 words
A device for generating a light beam of a particular polarization from an unpolarized beam of light wherein said device includes: means for separating said unpolarized beam into two polarized beams with orthogonal polarizations; means for adjusting the relative amplitudes of said polarized beams; and means for combining said adjusted beams, wherein said means for adjusting includes means for attenuating either or both of said polarized beams, and wherein said means for attenuating comprises: individual means for rotating the polarization of each polarized beam by a desired amount; individual analyzers for each of said rotated polarized beams; and individual means for negating the polarization rotation of said beams by said means for rotating.
Claim 5
Dependent Claim
21 words
The device as set forth in claim 1 wherein each said means for separating and for combining is a double refractor.
Claim 6
Dependent Claim
21 words
The device as set forth in claim 2 wherein each said means for separating and for combining is a double refractor.
Claim 7
Independent Claim
86 words
A method of controlling the polarization of a beam of light derived from an unpolarized beam of light, including the steps of: separating said unpolarized beam into two beams with orthogonal polarizations; selectively adjusting the relative amplitudes of said polarized beams; and combining said adjusted beams, wherein the step of selectively adjusting includes the steps of: individually rotating the polarization of said two beams; transmitting portions of said two beams in accordance with the rotations imparted thereto; and negating the polarization rotations of said transmitted beams.
Claim 8
Independent Claim
86 words
A method of controlling the polarization of a beam of light derived from an unpolarized beam of light, including the steps of: separating said unpolarized beam into two beams with orthogonal polarizations; selectively adjusting the relative amplitudes of said polarized beams; and combining said adjusted beams, wherein the step of selectively adjusting includes the steps of: individually rotating the polarization of said two beams; transmitting portions of said two beams in accordance with the rotations imparted thereto; and negating the polarization rotations of said transmitted beams.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |