US3882273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical beam scanning system
Assignee: RCA Corp
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Filing: 1973-10-24
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Granted: 1975-05-06
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Expires: 1993-10-24
Abstract
Abstract A system for scanning a laser beam at television rates includes an acousto-optic Bragg-angle deflector for horizontal scanning, and a rotatable galvanometer mirror for vertical scanning. The optical path includes spherical and cylindrical lenses in an arrangement that utilizes inexpensive lenses, provides high resolution, and is physically compact.
Inventors
- 👤 Joseph Dale Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
In a system for deflecting a light beam in horizontal and vertical directions, an acousto-optic horizontal light deflector having an aperture which is elongated in the horizontal plane of deflection and is narrow in the vertical plane, a spherical beam expander lens to expand the beam to a diameter equal to the elongated dimension of said deflector aperture, a first cylindrical lens positioned closely following said beam expander lens and oriented to not affect light in the horizontal plane but to converge slightly-expanded lighT in the vertical plane to the narrow dimension of the deflector aperture, a spherical collimator lens to direct the horizontally expanded beam in parallel rays through said acousto-optic deflector, and a reverse telescope, including a spherical converging lens and a second cylindrical lens spaced from said converging lens, to focus the light from said deflector to a point in a utilization plane.
Claim 2
Dependent Claim
146 words
In a system for deflecting a light beam in horizontal and vertical directions, an acousto-optic horizontal light deflector having an aperture which is elongated in the horizontal plane of deflection and is narrow in the vertical plane, a spherical beam expander lens to expand the beam to a diameter equal to the elongated dimension of said deflector aperture, a first cylindrical lens positioned closely following said beam expander lens and oriented to not affect light in the horizontal plane but to converge slightly-expanded lighT in the vertical plane to the narrow dimension of the deflector aperture, a spherical collimator lens to direct the horizontally expanded beam in parallel rays through said acousto-optic deflector, and a reverse telescope, including a spherical converging lens and a second cylindrical lens spaced from said converging lens, to focus the light from said deflector to a point in a utilization plane.
Claim 3
Dependent Claim
18 words
The combination as defined in claim 1 wherein a vertical deflector is positioned after said second cylindrical lens.
Claim 4
Dependent Claim
16 words
The combination as defined in claim 2 wherein said vertical deflector is a gavanometer mirror deflector.
Claim 5
Dependent Claim
17 words
The combination as defined in claim 2 wherein said vertical deflector is a rotating refractive polygonal prism.
Claim 6
Dependent Claim
32 words
The combination as defined in claim 1 wherein said reverse telescope includes a third cylindrical lens effective to focus the beam in the horizontal plane to a point on a utilization plane.
Claim 7
Dependent Claim
29 words
The combination as defined in claim 5 wherein said second cylindrical lens is effective to focus the beam in the vertical plane to a point on the utilization plane.
Claim 8
Dependent Claim
20 words
The combination as defined in claim 6 wherein a vertical deflector is positioned between said second and third cylindrical lenses.
Claim 9
Dependent Claim
35 words
The combination as defined in claim 1 wherein said reverse telescope includes a final spherical projection lens, and wherein a vertical deflector is positioned between said second cylindrical lens and said final spherical projection lens.
Claim 10
Dependent Claim
17 words
The combination as defined in claim 8 wherein said vertical deflector is a rotating refractive polygonal prism.
Claim 11
Dependent Claim
30 words
The combination as defined in claim 1 in which a slit filter is positioned just prior to said rotating prism and oriented with a slit lying in the horizontal plane.
References Cited (Backward Citations)
US3397605A
Cited
US3514534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |