US4394060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light beam scanning system with saw transducer
Assignee: Canon Inc
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Filing: 1981-04-15
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Granted: 1983-07-19
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Expires: 2001-04-15
Abstract
Abstract A very compact light beam scanning system is provided by utilizing the optical integrated circuit technique. A Luneburg lens of As 2 S 3 and a SAW transducer device are provided on a waveguide and a wideband heterodyning RF oscillator including two varactor tuned oscillators and a digital linearization circuit are provided as the drive circuit for the transducer device.
Inventors
- 👤 Carl M. Verber
- 👤 Richard P. Kenan
- 👤 Richard Ridgway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; G02F1/113; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/12004; G02F1/29; G02F1/33; G02F1/335
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
A light beam scanning system comprising: an optical waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means, said driving means comprising a heterodyning RF sweep generator having a varactor tuned oscillator and a constant frequency oscillator.
Claim 2
Dependent Claim
48 words
A light beam scanning system comprising: an optical waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means, said driving means comprising a heterodyning RF sweep generator having a varactor tuned oscillator and a constant frequency oscillator.
Claim 3
Dependent Claim
32 words
A light beam scanning system according to claim 1, wherein said driving means further comprises a digital linearization circuit for compensating for the non-linearity of the frequency of said varactor tuned oscillator.
Claim 4
Dependent Claim
21 words
A light beam scanning system according to claim 1 or 2, wherein said constant frequency oscillator is another varactor tuned oscillator.
Claim 5
Dependent Claim
55 words
A light beam scanning system comprising: an optical waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means, said driving means comprising a varactor tuned oscillator and a digital linearization circuit for compensating for the non-linearity of the frequency of said varactor tuned oscillator.
Claim 6
Dependent Claim
55 words
A light beam scanning system comprising: an optical waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means, said driving means comprising a varactor tuned oscillator and a digital linearization circuit for compensating for the non-linearity of the frequency of said varactor tuned oscillator.
Claim 7
Dependent Claim
23 words
A light beam scanning system according to claim 1, 2 or 4, wherein said waveguide is made of titanium in-diffused LiNbO 3 .
Claim 8
Dependent Claim
24 words
A light beam scanning system according to claim 1, 2 or 4, wherein said SAW transducer means is a multiple tilted SAW transducer array.
Claim 9
Dependent Claim
26 words
A light beam scanning system according to claim 1, 2 or 4, further comprising a Luneburg lens comprising As 2 S 3 provided on said waveguide.
Claim 10
Dependent Claim
46 words
A light beam scanning system comprising: an optical waveguide; a Luneburg lens comprising As 2 S 3 provided on said waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means with a linear chirp signal.
Claim 11
Dependent Claim
46 words
A light beam scanning system comprising: an optical waveguide; a Luneburg lens comprising As 2 S 3 provided on said waveguide; SAW transducer means for generating surface acoustic waves in said waveguide; and driving means for driving said SAW transducer means with a linear chirp signal.
Claim 12
Dependent Claim
20 words
A light beam scanning system according to claim 8, wherein said waveguide is made of titanium in-diffused LiNbO 3 .
Claim 13
Dependent Claim
36 words
A light beam scanning system according to claim 1, 4 or 8, wherein said drive means is constructed to modulate the light applied to said waveguide in synchronism with the driving of said SAW transducer means.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |