Patent US4523803A successfully refreshed from Google Patents.
US4523803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanning device
Assignee: Canon Inc
•
Filing: 1982-02-18
•
Granted: 1985-06-18
•
Expires: 2002-02-18
Abstract
Abstract A novel optical scanning device which utilizes the light integrating technique is provided. In the device, a light beam is deflected by forming a light deflecting portion and a condensing thin film lens on a thin film waveguide path and further, the deflected light is transmitted by a transmission path bundle wider in the light exit portion thereof than in the light entrance portion thereof. The device is a compact optical scanning device which can scan a wider area at high speed.
Inventors
- 👤 Kozo Arao
- 👤 Tadashi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/12007; G02B6/12004; G02B6/24; G02B6/26; G02B6/30; G02F; G02F1/00; G02F1/29; G02F1/33; G02F1/335; H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/126; H04N1/1275; H04N1/1295
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
An optical scanning device comprising: a substrate; a thin film waveguide path for propagating a light beam, said thin film waveguide path being formed on said substrate; a waveguide path bundle formed integrally with and of the same material as said thin film waveguide path on said substrate, each waveguide path of said waveguide path bundle having a light entrance portion and a light exit portion, and being wider in the light exit portion thereof than in the light entrance portion thereof onto which the light beam propagated in said thin film waveguide path in incident; first means for deflecting a light beam propagated in said thin film waveguide path; and second means for condensing a light beam deflected by said first means to guide deflected light beam onto said light entrance portion of said waveguide path bundle.
Claim 2
Dependent Claim
138 words
An optical scanning device comprising: a substrate; a thin film waveguide path for propagating a light beam, said thin film waveguide path being formed on said substrate; a waveguide path bundle formed integrally with and of the same material as said thin film waveguide path on said substrate, each waveguide path of said waveguide path bundle having a light entrance portion and a light exit portion, and being wider in the light exit portion thereof than in the light entrance portion thereof onto which the light beam propagated in said thin film waveguide path in incident; first means for deflecting a light beam propagated in said thin film waveguide path; and second means for condensing a light beam deflected by said first means to guide deflected light beam onto said light entrance portion of said waveguide path bundle.
Claim 3
Dependent Claim
19 words
A device according to claim 1, wherein said second means includes a thin film lens formed on said waveguide.
Claim 4
Dependent Claim
46 words
A device according to claim 2, wherein said thin film lens has a curved condensed surface and the light entrance portion of said waveguide path bundle is formed in a curved shape that is in conformity with said curved condensed surface of said thin film lens.
Claim 5
Dependent Claim
36 words
A device according to claim 1, wherein said first means includes a comb-tooth-like transducer for exciting an acoustic wave in said waveguide, and means for applying to said transducer a signal having a frequency which varies.
Claim 6
Dependent Claim
47 words
A device according to claim 1, comprising a plurality of said thin film waveguide paths and a plurality of said waveguide path bundles formed on said substrate and the light exit portions of said plurality of said waveguide path bundles are arranged in a rectilinearly continuous manner.
References Cited (Backward Citations)
US3514534A
Cited
US3877784A
Cited
JPS5268307A
Cited
US4253060A
Cited
US4297704A
Cited
US4425023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |