US4738501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light beam scanning apparatus, and read-out apparatus and recording apparatus using same
Assignee: Fujifilm Holdings Corp
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Filing: 1986-04-08
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Granted: 1988-04-19
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Expires: 2006-04-08
Abstract
Abstract A light beam scanning system comprises a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, and a means for generating the surface acoustic waves in the wave guide so that they advance along an optical path of light incident upon the wave guide, and a drive circuit for periodically applying a pulsewise voltage to the surface acoustic wave generating means. The wave guided inside of the wave guide is emitted out of the wave guide at the section where the surface acoustic waves are present by a coupling action of a grating generated by the surface acoustic waves with the guided wave.
Inventors
- 👤 Hiroshi Sunagawa
- 👤 Nobuharu Nozaki
- 👤 Jin Murayama
- 👤 Yoji Okazaki
- 👤 Toshio Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/126; H04N1/1275; G; G02; G02F; G02F1/00; G02F1/29; G02F1/33; G02F1/335; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1285; G02F1/01; G02F1/0147; G02F2201/00; G02F2201/30; G02F2201/302
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
111 words
A light beam scanning apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of light incident upon said wave guide, and (iii) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, whereby the wave guided inside of said wave guide is radiated out of said wave guide at the section where said surface acoustic waves are present by a coupling action of a grating generated by said surface acoustic waves with the guided wave.
Claim 2
Dependent Claim
111 words
A light beam scanning apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of light incident upon said wave guide, and (iii) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, whereby the wave guided inside of said wave guide is radiated out of said wave guide at the section where said surface acoustic waves are present by a coupling action of a grating generated by said surface acoustic waves with the guided wave.
Claim 3
Dependent Claim
25 words
An apparatus as defined in claim 1 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a chirped period.
Claim 4
Dependent Claim
25 words
An apparatus as defined in claim 1 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a single period.
Claim 5
Dependent Claim
28 words
An apparatus as defined in claim 1, wherein said surface acoustic waves advance in the same direction as the advance direction of the wave in said wave guide.
Claim 6
Dependent Claim
25 words
An apparatus as defined in claim 1, wherein said surface acoustic waves advance reversely to the advance direction of the wave in said wave guide.
Claim 7
Dependent Claim
24 words
An apparatus as defined in claim 1 wherein a converging optical system for converging the light radiated out of the wave guide is provided.
Claim 8
Dependent Claim
30 words
An apparatus as defined in claim 1 wherein an end face of said wave guide opposite to an input face thereof is subjected to a return light generation preventing processing.
Claim 9
Dependent Claim
35 words
An apparatus as defined in claim 7 wherein said end face of said wave guide is formed obliquely with respect to said optical path of said guided wave as said return light generation preventing processing.
Claim 10
Dependent Claim
184 words
A light beam scanning read-out apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a light source for emitting light into said wave guide, (iii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of the wave inside of said wave guide, (iv) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, (v) a sub-scanning means for moving a read-out original, which is positioned so that the light radiated out of said wave guide by a coupling action of a grating generated by said surface acoustic waves with the wave guided inside of said wave guide impinges upon said read-out original, with respect to said wave guide in a direction approximately normal to the advance direction of said surface acoustic waves, and (vi) a photodetector for photoelectrically detecting light transmitting through said original, light reflected by said original, or light radiated by said original when said light radiated out of said stack impinges upon said original.
Claim 11
Dependent Claim
184 words
A light beam scanning read-out apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a light source for emitting light into said wave guide, (iii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of the wave inside of said wave guide, (iv) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, (v) a sub-scanning means for moving a read-out original, which is positioned so that the light radiated out of said wave guide by a coupling action of a grating generated by said surface acoustic waves with the wave guided inside of said wave guide impinges upon said read-out original, with respect to said wave guide in a direction approximately normal to the advance direction of said surface acoustic waves, and (vi) a photodetector for photoelectrically detecting light transmitting through said original, light reflected by said original, or light radiated by said original when said light radiated out of said stack impinges upon said original.
Claim 12
Dependent Claim
25 words
An apparatus as defined in claim 9 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a chirped period.
Claim 13
Dependent Claim
25 words
An apparatus as defined in claim 9 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a single period.
Claim 14
Dependent Claim
28 words
An apparatus as defined in claim 9, wherein said surface acoustic waves advance in the same direction as the advance direction of the wave in said wave guide.
Claim 15
Dependent Claim
25 words
An apparatus as defined in claim 9, wherein said surface acoustic waves advance reversely to the advance direction of the wave in said wave guide.
Claim 16
Dependent Claim
24 words
An apparatus as defined in claim 9 wherein a converging optical system for converging the light radiated out of the wave guide is provided.
Claim 17
Dependent Claim
172 words
A light beam scanning recording apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a light source for emitting light into said wave guide, (iii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of the wave inside of said wave guide, (iv) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, (v) a sub-scanning means for moving a light-sensitive material, which is positioned so that the light radiated out of said wave guide by a coupling action of a grating generated by said surface acoustic waves with the wave guided inside of said wave guide impinges upon said light-sensitive material, with respect to said wave guide in direction approximately normal to the advance direction of said surface acoustic waves, and (vi) a modulation means for modulating said light incident upon said wave guide from said light source in accordance with an image signal.
Claim 18
Dependent Claim
172 words
A light beam scanning recording apparatus which comprises: (i) a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, (ii) a light source for emitting light into said wave guide, (iii) a means for generating the surface acoustic waves in said wave guide so that they advance along an optical path of the wave inside of said wave guide, (iv) a drive circuit for periodically applying a pulsewise voltage to said surface acoustic wave generating means, (v) a sub-scanning means for moving a light-sensitive material, which is positioned so that the light radiated out of said wave guide by a coupling action of a grating generated by said surface acoustic waves with the wave guided inside of said wave guide impinges upon said light-sensitive material, with respect to said wave guide in direction approximately normal to the advance direction of said surface acoustic waves, and (vi) a modulation means for modulating said light incident upon said wave guide from said light source in accordance with an image signal.
Claim 19
Dependent Claim
25 words
An apparatus as defined in claim 15 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a chirped period.
Claim 20
Dependent Claim
25 words
An apparatus as defined in claim 15 wherein said drive circuit is constituted to generate a group of surface acoustic waves of a single period.
Claim 21
Dependent Claim
28 words
An apparatus as defined in claim 15, wherein said surface acoustic waves advance in the same direction as the advance direction of the wave in said wave guide.
Claim 22
Dependent Claim
25 words
An apparatus as defined in claim 15, wherein said surface acoustic waves advance reversely to the advance direction of the wave in said wave guide.
Claim 23
Dependent Claim
24 words
An apparatus as defined in claim 15 wherein a converging optical system for converging the light radiated out of the wave guide is provided.
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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |