Patent US2280738A successfully refreshed from Google Patents.
Patent US3831028A successfully refreshed from Google Patents.
US3831028A
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Radiation detector using electro-optics
Assignee: United States Atomic Energy Commission
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Filing: 1973-06-26
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Granted: 1974-08-20
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Expires: 1993-06-26
Abstract
Abstract The radiation detector consists of a cell containing a polar liquid positioned between two crossed polarizers. The light beam is directed through the cell to a detector and the polarizers are arranged for extinction of the light. Local birefringence developed by the ionizing radiation permits light to be transmitted to the light detector.
Inventors
- 👤 I Kerlman
- 👤 A Strash
- 👤 J Kastner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:55
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/3511; G01; G01T; G01T1/00; G01T1/16; G01T3/00; G02F1/01; G02F1/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A device for detecting highly ionized radiation comprising, a monochromatic light source for directing a monochromatic light beam along a predetermined path, light detection means positioned in said path for receiving and detecting said light beam, first and second polarizing plates positioned in said path between said light detection means and said light source, a cell containing a polar liquid positioned between said first and second polarizing plates, the axes of said first and second polarizing plates being adjusted to reduce the intensity of said light beam reaching said light detection means to a minimum in the absence of the ionizing radiation, said polar liquid being responsive to the ionizing radiation to develop a local birefringence in the polar liquid thereby increasing the intensity of said light beam reaching said light detecting means to a value greater than said minimum.
Claim 2
Independent Claim
140 words
A device for detecting highly ionized radiation comprising, a monochromatic light source for directing a monochromatic light beam along a predetermined path, light detection means positioned in said path for receiving and detecting said light beam, first and second polarizing plates positioned in said path between said light detection means and said light source, a cell containing a polar liquid positioned between said first and second polarizing plates, the axes of said first and second polarizing plates being adjusted to reduce the intensity of said light beam reaching said light detection means to a minimum in the absence of the ionizing radiation, said polar liquid being responsive to the ionizing radiation to develop a local birefringence in the polar liquid thereby increasing the intensity of said light beam reaching said light detecting means to a value greater than said minimum.
Claim 3
Dependent Claim
14 words
The ionizing radiation detection device of claim 1, wherein said polar liquid is monofluorobenzene.
Claim 4
Dependent Claim
14 words
The ionizing radiation detection device of claim 1, wherein said polar liquid is monochlorobenzene.
Claim 5
Dependent Claim
14 words
The ionizing radiation detection device of claim 1, wherein said polar liquid is o-dichlorobenzene.
Claim 6
Dependent Claim
14 words
The ionizing radiation detection device of claim 1, wherein said polar liquid is o-difluorobenzene.
Claim 7
Dependent Claim
16 words
The ionizing radiation detection device of claim 1, wherein said monochromatic light source is a laser.
Claim 8
Dependent Claim
55 words
The ionizing radiation detection device of claim 1, wherein said first polarizing plate is fixed and said second polarizing plate is rotatable, and means for rotating said second polarizing plate to adjust the angle of polarization thereof to reduce the intensity of said light beam to a minimum in the absence of the ionizing radiation.
References Cited (Backward Citations)
US3556662A
Cited
US3560955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |