US5835643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide input/output device
Assignee: Minolta Co Ltd
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Filing: 1996-09-16
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Granted: 1998-11-10
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Expires: 2016-09-16
Abstract
Abstract A waveguide input/output device for input and output of laser light L into a thin-film waveguide 2 via an input grating or prism 7 and an output or emission grating 8. The height of the emission grating 8 is gradually increased in a travel direction of a light advancing through the waveguide and either the height of the input grating 7 or the height of the output grating 8 is gradually increased in the direction of propagation of the service elastic waves in the waveguide 3 generated by a transducer element 3.
Inventors
- 👤 Shinji Fukumoto
- 👤 Naoki Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/33; G02F1/335; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/34; G02F2201/00; G02F2201/30; G02F2201/302
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
125 words
A waveguide input/output device comprising: a waveguide; an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein one of the height of individual elements of said input grating and the height of individual elements of said output grating gradually increases in the direction of propagation of surface elastic waves generated by said transducer element.
Claim 2
Dependent Claim
125 words
A waveguide input/output device comprising: a waveguide; an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein one of the height of individual elements of said input grating and the height of individual elements of said output grating gradually increases in the direction of propagation of surface elastic waves generated by said transducer element.
Claim 3
Dependent Claim
24 words
A waveguide input/output device according to claim 1, further comprising a signal generating means connected to said transducer element for driving said transducer element.
Claim 4
Dependent Claim
27 words
A waveguide input/output device according to claim 1 wherein individual elements of said input and said output gratings are disposed at a constant pitch on said waveguide.
Claim 5
Dependent Claim
40 words
A waveguide input/output device according to claim 1 wherein the height of said input grating is uniform in the direction of light advancing through said waveguide and is uniform in the direction of propagation of said surface of elastic waves.
Claim 6
Dependent Claim
47 words
A waveguide input/output device in accordance with claim 1 wherein the height of said output grating gradually increases in the direction of light advancing through said waveguide and the height of individual elements of said output grating gradually increases in the direction of said surface elastic waves.
Claim 7
Dependent Claim
19 words
A waveguide input/output device in accordance with claim 4 wherein said input grating is replaced by an input prism.
Claim 8
Dependent Claim
19 words
A waveguide input/output device in accordance with claim 5 wherein said input grating is replaced by an input prism.
Claim 9
Dependent Claim
17 words
A waveguide input/output device in accordance with claim 1 wherein said waveguide is a thin film waveguide.
Claim 10
Dependent Claim
128 words
A waveguide input/output device comprising: a waveguide: an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein said input grating has a rectangular cross-section and the height of said input grating is uniform in the direction of light advancing through said waveguide and the height gradually increases in the direction of propagation of said surface elastic waves.
Claim 11
Dependent Claim
128 words
A waveguide input/output device comprising: a waveguide: an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein said input grating has a rectangular cross-section and the height of said input grating is uniform in the direction of light advancing through said waveguide and the height gradually increases in the direction of propagation of said surface elastic waves.
Claim 12
Dependent Claim
154 words
A waveguide input/output device comprising: a waveguide: an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein the height of said input grating gradually increases in the direction of propagation of surface elastic waves generated by said transducer element, and wherein the height of said output grating has a rectangular cross-section and the height of said output grating gradually increases in the travel direction of light advancing through said waveguide and is uniform in a direction of propagation of said surface elastic waves.
Claim 13
Dependent Claim
154 words
A waveguide input/output device comprising: a waveguide: an input grating located at a first position on said waveguide at an area where light is input into said waveguide; an output grating located at a second position on said waveguide at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide; and a transducer element located adjacent an area between said input grating and said output grating for generating surface elastic waves, wherein the height of said input grating gradually increases in the direction of propagation of surface elastic waves generated by said transducer element, and wherein the height of said output grating has a rectangular cross-section and the height of said output grating gradually increases in the travel direction of light advancing through said waveguide and is uniform in a direction of propagation of said surface elastic waves.
Claim 14
Dependent Claim
80 words
A waveguide input/output device comprising: a waveguide an input grating for inputting light into said waveguide; an output grating for outputting light from said waveguide, wherein the height of said output grating gradually increases in the travel direction of light advancing through said waveguide, and one of the height of individual elements of said input grating and the height of individual elements of said output grating gradually increases in the direction of propagation of surface elastic waves in said waveguide.
Claim 15
Dependent Claim
80 words
A waveguide input/output device comprising: a waveguide an input grating for inputting light into said waveguide; an output grating for outputting light from said waveguide, wherein the height of said output grating gradually increases in the travel direction of light advancing through said waveguide, and one of the height of individual elements of said input grating and the height of individual elements of said output grating gradually increases in the direction of propagation of surface elastic waves in said waveguide.
Claim 16
Dependent Claim
74 words
A waveguide input/output device comprising: a waveguide; an input grating provided at an area where light is input into said waveguide and having individual elements which gradually increase in height in the direction of propagation of surface elastic waves in said waveguide; and an output grating provided at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide.
Claim 17
Dependent Claim
74 words
A waveguide input/output device comprising: a waveguide; an input grating provided at an area where light is input into said waveguide and having individual elements which gradually increase in height in the direction of propagation of surface elastic waves in said waveguide; and an output grating provided at an area where light is output from said waveguide and having a gradually increasing height in the direction of travel of light advancing through said waveguide.
Claim 18
Dependent Claim
57 words
A waveguide input/output device comprising: a waveguide; and output grating provided at an area where light is output from said waveguide and having individual elements which gradually increase in height in the direction of propagation of surface elastic waves, as well as a gradually increasing height in the direction of travel of light advancing through said waveguide.
Claim 19
Dependent Claim
57 words
A waveguide input/output device comprising: a waveguide; and output grating provided at an area where light is output from said waveguide and having individual elements which gradually increase in height in the direction of propagation of surface elastic waves, as well as a gradually increasing height in the direction of travel of light advancing through said waveguide.
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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) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |