US4595876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical voltage and electric field sensor
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1982-07-12
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Granted: 1986-06-17
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Expires: 2002-07-12
Abstract
Abstract An optical voltage and electric field sensor for detecting the voltage or electric field applied to a device made of a single crystal of bismuth silicon oxide (Bi12SiO20) or bismuth germanium oxide (Bi12GeO20) is disclosed. The device comprises a plurality of crystal plates stacked in a direction perpendicular to the propagation direction of light, each plate having only one dimension reduced to a very small size.
Inventors
- 👤 Yoshiki Kuhara
- 👤 Koji Tada
- 👤 Masami Tatsumi
- 👤 Yuuji Hamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:33
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0322; G01; G01R; G01R15/00; G01R15/14; G01R15/24; G01R15/241; G01R15/242
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
98 words
An optical voltage and electric field sensor composed of a plurality of single crystal plates of Bi 12 XO 20 each having a thin thickness in a direction of <1 1 0> wherein X is selected from a group consisting of Si or Ge, comprising: said plates being stacked in a direction of <1 1 0> and in parallel with the direction of incident light, and the voltage or the electric field to be detected being applied to said stacked plates in a direction of <1 1 0> which direction is vertical to the direction of incident light.
Claim 2
Dependent Claim
98 words
An optical voltage and electric field sensor composed of a plurality of single crystal plates of Bi 12 XO 20 each having a thin thickness in a direction of <1 1 0> wherein X is selected from a group consisting of Si or Ge, comprising: said plates being stacked in a direction of <1 1 0> and in parallel with the direction of incident light, and the voltage or the electric field to be detected being applied to said stacked plates in a direction of <1 1 0> which direction is vertical to the direction of incident light.
Claim 3
Dependent Claim
28 words
A sensor according to claim 1, wherein the individual crystal plates have a thickness of not more than 0.8 mm in the direction in which they are stacked.
Claim 4
Dependent Claim
18 words
The sensor according to claims 1 or 2, wherein said crystal plates each have substantially the same dimensions.
Claim 5
Dependent Claim
23 words
The sensor according to claim 3, wherein said crystal plates are stacked in an off-set arrangement with alternate crystals aligned with each other.
Claim 6
Dependent Claim
25 words
The sensor according to claims 1 or 2, further comprising a voltage source and electrodes arranged to contact adjacent contacting surfaces of said crystal plates.
Claim 7
Dependent Claim
18 words
The sensor of claims 1 or 2 further comprising adhesive means to bond crystal plates to each other.
Claim 8
Dependent Claim
14 words
The sensor of claim 6, wherein said adhesive is a light absorbing vinyl acetate.
Claim 9
Dependent Claim
99 words
An optical voltage and electric field sensor composed of a plurality of single crystal plates of Bi 12 XO 20 each having a thin thickness in a direction of <1 0 0> wherein X is selected from the group consisting of Si or Ge, comprising: said plates being stacked in a direction of <1 0 0> which direction is vertical to the direction of incident light, and the voltage or the electric field to be detected being applied to said stacked plates in a direction of <0 1 0> which direction is parallel to the direction of incident light.
Claim 10
Dependent Claim
99 words
An optical voltage and electric field sensor composed of a plurality of single crystal plates of Bi 12 XO 20 each having a thin thickness in a direction of <1 0 0> wherein X is selected from the group consisting of Si or Ge, comprising: said plates being stacked in a direction of <1 0 0> which direction is vertical to the direction of incident light, and the voltage or the electric field to be detected being applied to said stacked plates in a direction of <0 1 0> which direction is parallel to the direction of incident light.
Claim 11
Dependent Claim
28 words
A sensor according to claim 8, wherein the individual crystal plates have a thickness of not more than 0.8 mm in the direction in which they are stacked.
Claim 12
Dependent Claim
16 words
A sensor according to claim 9, wherein said crystal plates each have substantially the same dimensions.
Claim 13
Dependent Claim
17 words
A sensor according to claim 9, further comprising adhesive means to bond crystal plates to each other.
Claim 14
Dependent Claim
16 words
A sensor according to claim 8, wherein said crystal plates each have substantially the same dimensions.
Claim 15
Dependent Claim
17 words
A sensor according to claim 8, further comprising adhesive means to bond crystal plates to each other.
Claim 16
Dependent Claim
15 words
A sensor according to claim 13, wherein said adhesive is a light absorbing vinyl acetate.
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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |