US3582653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionizing radiation spectrometer
Assignee: ROBERT G HOWARD
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Filing: 1970-06-16
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Granted: 1971-06-01
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Expires: 1990-06-16
Abstract
Abstract Quantitative measuring devices such as capsules of lithium flouride are placed within a stack of filter plates and one end of the stack is directly exposed to a beam of radiation. The quantitative measuring devices are then removed from the filtering materials stack and treated to yield a discernible and measurable entity proportional to the amount of energy absorbed from the radiation. The energy spectrum is then mathematically solved to produce the percentage of the total energy of the radiation residing in each band of a number of discrete energy bands. The number of bands are equal to the number of quantitative measuring devices used and the bands maybe of equal or unequal bandwidth.
Inventors
- 👤 Robert G Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:23
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/36; G01T1/02; G01T1/10; G01T1/11
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
The system of claim 1 wherein the expansion of Ixis a system of N linear equations in N unknowns yielding the energy content of each bandwidth denoted by the said series and representing the total energy spectrum.
Claim 2
Dependent Claim
37 words
The system of claim 2 wherein at least one of said filter means is dimensioned and arranged in the stack so that it presents a unique thickness of filter material to the path of the propagating radiation.
Claim 3
Dependent Claim
19 words
The systeM of claim 2 wherein at least one of said filter means is of a unique attenuating characteristic.
Claim 4
Dependent Claim
51 words
The system of claim 2 wherein at least one of said filter means is dimensioned and arranged in the stack so that it presents a unique thickness of filter material to the path of the propagation radiation and at least one of said filter means is of a unique attenuating characteristic.
Claim 5
Dependent Claim
61 words
The system of claim 1 wherein said sensors are of phosphor material and sensitive to X-ray radiation; said filter means are lead plates; said treating means includes a heating plate upon which said phosphor material is placed after radiation and includes a photodetector which reads the radiation absorbed by the sensor when heated to a critical temperature by the heating plate.
Claim 6
Dependent Claim
97 words
The system of claim 1 wherein the expansion of Ixis a system of N linear equations and N unknowns which is solved according to the program of the computer, said solution of said N linear equations and N unknowns yielding the energy content of each bandwidth denoted by said series and representing the total energy spectrum; said filter means are dimensioned and arranged in said stacks so that the said filter means present equal thickness of filter material in the path of the propagating radiation; and said filter means being perpendicular to said propagating direction of radiation.
Claim 7
Dependent Claim
114 words
The system of claim 9 wherein said beam of radiation is within the spectrum of visible light; said filter means is a semitransparent material by which light is passed through said filter means but attenuated as a function of the energy levels present in the beam and the distance of the filtering material through which the beam is made to pass; said sensors are sensitive to said visible light and absorb energy within the visible light spectrum; said treating means includes a light source directed at said sensor after radiation and a photodetector which reads the energy absorbed by the sensor as a function of the light transmitted by the sensor to the photodetector.
Claim 8
Dependent Claim
104 words
The system of claim 7 wherein said beam of radiation is within the X-ray operation, said sensors are of phosphor material, sensitive to X-ray radiations; said filter means are lead plates; said treating means includes a heating plate upon which said phosphor material is placed after radiation and includes a photodetector which reads the radiation of the sensor when heated to a critical temperature by the heating plate. 10 The system of claim 1 wherein said filter means are dimensioned and arranged in said stack so that the said filter means present equal thickness of filter material to the path of the propagating radiation.
Claim 9
Dependent Claim
19 words
The system of claim 10 wherein said filter means are parallel to the propagating direction of the radiation beam.
Claim 10
Dependent Claim
113 words
The system of claim 1 wherein said beam of radiation is within the spectrum of visible light; said filter means is a semitransparent material by which light is passed through the said filter means but attenuated as a function of the energy levels present in the beam and the thickness of the filtering material through which the beam is made to pass; said sensors are sensitive to said visible light and absorb energy within the visible light spectrum; and said treating means includes a light source directed at said sensor after radiation and a photodetector which reads the energy absorbed by the sensor as a function of the light passed through the sensor.
Claim 11
Independent Claim
262 words
A method for determining the bandwidth energy distribution within a beam having a spectrum of electromagnetic radiation energy comprising the steps of: arranging a monitoring stack composed of alternately placed sensors and filter material plates; arranging the stacks so that its axis is in the path of propagation of said beam of energy and each sensor is a unique distance from the source of the beam of energy; irradiating the stack; treatIng each sensor to yield a signal indicative of the energy absorbed by each sensor; storing each signal in a computer; processing the stored signals, each signal corresponding to a respective irradiated sensor according to the mathematical expansion where Ix is the intensity of the radiated beam passing through x distance of filter material and corresponds to the amount of energy absorbed by each sensor in said stack, n is the series n Q/N, 2Q/N, 3Q/N....NQ/N; the number of sensors N in said stack being equal to the number of elements in said series n, Q is expressed in Mev./photon is an initially assumed value of maximum intensity of energy present in the beam; Pxnrepresents the attenuation and is a known coefficient for the filters and is the ratio of the intensity of an incident beam of a given energy level to the intensity of the beam after passing through x distance of filtering material and I0nis the percentage of the beam''s total energy residing within the discrete bandwidths comprised by the total energy spectrum where each energy bandwidth is denoted by an element in the series n Q/N, 2Q/N, 3Q/N....NQ/N.
Claim 12
Dependent Claim
59 words
The method of claim 13 wherein the expansion of Ix is a system of N linear equations and N unknowns which is solved according to the program of the computer, said solution of said N linear equations in N unknowns yielding the energy content of each bandwidth denoted by the said series and comprised by the total energy spectrum.
Claim 13
Dependent Claim
15 words
The method of claim 14 wherein said beam of energy is within the X-ray spectrum.
Claim 14
Dependent Claim
16 words
The method of claim 14 wherein said beam of radiation is in the visible light spectrum.
Claim 15
Dependent Claim
17 words
The method of claim 14 wherein said beam of radiation is in the gamma ray light spectrum.
References Cited (Backward Citations)
US2715684A
Cited
US3238369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |