US3695745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light wave guide circuit
Assignee: NEC Corp
•
Filing: 1970-01-18
•
Granted: 1972-10-03
•
Expires: 1990-01-18
Abstract
Abstract A light wave guide circuit includes a transparent body capable of exhibiting the electro-optical effect. Electrodes are formed according to a preselected pattern on at least one surface of the body such that when a voltage is applied to the electrode, a variation is produced in the index of refraction of that portion of the body lying beneath the electrode thereby forming a selective light path in the body.
Inventors
- 👤 Motoaki Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/035
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A lighT wave guide circuit comprising a plate of substantially transparent electro-optic material, a first electrode formed in a preselected pattern on at least one major surface of said plate according to the pattern of light wave guide path to be formed in said plate, a second electrode formed on an opposing surface of said plate, and means for applying a voltage across said plate through said first and second electrodes, the application of said voltage causing a change in the refractive index of the portion of said plate lying beneath said first electrode for selectively forming a light wave guide path in said plate conforming in size and shape to said first electrode pattern so long as said voltage is applied across said electrodes.
Claim 2
Dependent Claim
125 words
A lighT wave guide circuit comprising a plate of substantially transparent electro-optic material, a first electrode formed in a preselected pattern on at least one major surface of said plate according to the pattern of light wave guide path to be formed in said plate, a second electrode formed on an opposing surface of said plate, and means for applying a voltage across said plate through said first and second electrodes, the application of said voltage causing a change in the refractive index of the portion of said plate lying beneath said first electrode for selectively forming a light wave guide path in said plate conforming in size and shape to said first electrode pattern so long as said voltage is applied across said electrodes.
Claim 3
Dependent Claim
29 words
The light wave guide circuit of claim 1, in which said first electrode is arranged on said one major surface in the form of a plurality of parallel strips.
Claim 4
Dependent Claim
22 words
The light wave guide of claim 2, further comprising insulation material arranged on said one surface intermediate said plurality of strip electrodes.
Claim 5
Dependent Claim
30 words
The light wave guide circuit of claim 1, further comprising first and second insulation layers respectively arranged intermediate said first and second electrodes and the opposing surfaces of said plate.
Claim 6
Dependent Claim
111 words
A light wave guide circuit comprising a transparent body of electro-optic material, first and second electrodes arranged in substantial registration on opposing major surfaces of said body, one of said electrodes having a predetermined pattern, and means for applying a voltage across said first and second electrodes for varying the index of refraction of the portion of said body lying between said first and second electrodes, and for thereby creating a light wave guide path in said body conforming in size and shape to said predetermined pattern, said one of said first and second electrodes being transparent and having an index of refraction approximately equal to that of said transparent body.
Claim 7
Dependent Claim
111 words
A light wave guide circuit comprising a transparent body of electro-optic material, first and second electrodes arranged in substantial registration on opposing major surfaces of said body, one of said electrodes having a predetermined pattern, and means for applying a voltage across said first and second electrodes for varying the index of refraction of the portion of said body lying between said first and second electrodes, and for thereby creating a light wave guide path in said body conforming in size and shape to said predetermined pattern, said one of said first and second electrodes being transparent and having an index of refraction approximately equal to that of said transparent body.
Claim 8
Dependent Claim
34 words
The light wave guide circuit of claim 5, in which first and second spaced pairs of electrodes respectively including said first and second electrodes are formed on said opposing major surfaces of said body.
Claim 9
Dependent Claim
35 words
The light wave guide circuit of claim 6, further comprising a transparent insulating material on at least one major surface of said body and interposed between the pair of electrodes on said one major surface.
Claim 10
Dependent Claim
31 words
The light wave guide circuit of claim 5, in which one of said first and second electrodes covers substantially the entire area of one of said major surfaces of said body.
References Cited (Backward Citations)
US3320013A
Cited
US3329474A
Cited
US3460884A
Cited
US3462211A
Cited
US3464762A
Cited
US3458247A
Cited
US3517200A
Cited
US3502875A
Cited
US3542536A
Cited
US3589794A
Cited
US3584230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |