US4693548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for recording information on a photosensitive medium for electrophotography
Assignee: Canon Inc
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Filing: 1985-01-25
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Granted: 1987-09-15
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Expires: 2005-01-25
Abstract
Abstract A novel information recording device scans and exposes a photosensitive medium for electrophotography by information light by the use of a scanning light forming optical integrated circuit (IOS) including a light deflecting portion and a condensing thin film lens on a thin film waveguide path. The device, as compared with prior art information recording devices using beam spot scanning, is very compact and capable of high-speed recording and can realize a low cost of manufacture.
Inventors
- 👤 Haruo Tsunoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1242; G06K15/1252; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G06K15/1285; H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/036; H04N1/04; H04N1/19; H04N1/191; H04N1/192
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A device for recording information on a photosensitive member, comprising: a plurality of independently controlled light sources; a plurality of waveguides, each having a length and a width and being adapted to propagate a light beam from an associated said light source along the lengthwise direction, said waveguides being arranged with their widths extending in a predetermined direction such that the widths of said waveguides lie along a line; deflecting means for deflecting, in the predetermined direction, the light beams propagated by said respective waveguides; a plurality of internal lens systems, one said internal lens system being provided in each of said waveguides; and an external lens system for condensing deflected light beams emerging from said waveguides, in cooperation with said internal lens systems, on the photosensitive member such that areas on the photosensitive member exposed by the deflected light beams emerging from said waveguides are larger than the width of any one of said waveguides and are cotinuously arranged in the predetermined direction.
Claim 2
Independent Claim
164 words
A device for recording information on a photosensitive member, comprising: a plurality of independently controlled light sources; a plurality of waveguides, each having a length and a width and being adapted to propagate a light beam from an associated said light source along the lengthwise direction, said waveguides being arranged with their widths extending in a predetermined direction such that the widths of said waveguides lie along a line; deflecting means for deflecting, in the predetermined direction, the light beams propagated by said respective waveguides; a plurality of internal lens systems, one said internal lens system being provided in each of said waveguides; and an external lens system for condensing deflected light beams emerging from said waveguides, in cooperation with said internal lens systems, on the photosensitive member such that areas on the photosensitive member exposed by the deflected light beams emerging from said waveguides are larger than the width of any one of said waveguides and are cotinuously arranged in the predetermined direction.
Claim 3
Dependent Claim
31 words
A device according to claim 1, wherein said plurality of light sources, said plurality of waveguides, said deflecting means and said external system are fixedly held on a common support bed.
Claim 4
Dependent Claim
35 words
A device according to claim 1, wherein each deflecting means includes a combtooth-like transducer for exciting an acoustic wave in said waveguide and means for applying to said transducer a signal whose frequency varies continuously.
Claim 5
Dependent Claim
22 words
A device according to claim 3, wherein the signals applied to each of said transducers are supplied from a common signal source.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |