Patent US1324084A successfully refreshed from Google Patents.
US4939737A
Expired / Lapsed
US
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Scanning apparatus with refracting area of variable refractive index
Assignee: Sharp Corp
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Filing: 1988-02-16
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Granted: 1990-07-03
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Expires: 2008-02-16
Abstract
Abstract A scanning apparatus with a refracting function comprising a laser beam oscillating area, one or more refracting areas with a waveguide having different refractive indexes, wherein an electric field is applied to the waveguide of the refracting area, by which the changes in the refractive index of the waveguide of the refracting area are attained so that laser beams from the laser beam oscillating area undergo refraction while they pass through the waveguide of the refracting area.
Inventors
- 👤 Sadayoshi Matsui
- 👤 Mototaka Taneya
- 👤 Mitsuhiro Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/295; H; H01; H01S; H01S5/00; H01S5/40; H01S5/4025; H01S5/4031; H01S5/4068; H01S5/06; H01S5/062; H01S5/06233; H01S5/06243; H01S5/4075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
In a scanning apparatus with a refracting function, said scanning apparatus including a laser beam oscillating area and an optical waveguiding area that is optically coupled with said laser beam oscillating area, the combination of: one or more refracting areas that are formed within said optical waveguiding area, said optical waveguiding area being surrounded with one or more boundary regions so that laser beams from said laser beam oscillating area are incident upon the waveguide of each of said refracting areas with an inclination to said waveguide; and a means for applying an electrical field to the waveguide of said refracting area, by which the changes in the refractive index of the waveguide of said refracting area attained so that laser beams from said laser beam oscillating area undergo refraction while they pass through the waveguide of said refracting area.
Claim 2
Dependent Claim
140 words
In a scanning apparatus with a refracting function, said scanning apparatus including a laser beam oscillating area and an optical waveguiding area that is optically coupled with said laser beam oscillating area, the combination of: one or more refracting areas that are formed within said optical waveguiding area, said optical waveguiding area being surrounded with one or more boundary regions so that laser beams from said laser beam oscillating area are incident upon the waveguide of each of said refracting areas with an inclination to said waveguide; and a means for applying an electrical field to the waveguide of said refracting area, by which the changes in the refractive index of the waveguide of said refracting area attained so that laser beams from said laser beam oscillating area undergo refraction while they pass through the waveguide of said refracting area.
Claim 3
Dependent Claim
26 words
A scanning apparatus according to claim 1, wherein said one or more boundary regions are disposed by the injection of protons into said optical waveguiding area.
Claim 4
Dependent Claim
27 words
A scanning apparatus according to claim 1, wherein said one or more boundary regions are disposed by the diffusion of a dopant into the optical waveguiding area.
References Cited (Backward Citations)
US3344365A
Cited
US3402366A
Cited
US3436679A
Cited
US3517337A
Cited
US4002997A
Cited
DE2711293A1
Cited
GB2053555A
Cited
US4462658A
Cited
JPS57111383A
Cited
JPS57130488A
Cited
US4503541A
Cited
US4564946A
Cited
US4608697A
Cited
US4677630A
Cited
US4743087A
Cited
US4768201A
Cited
US4675873A
Cited
GB2176939A
Cited
US4803692A
Cited
US4815090A
Cited
US4815084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |