Patent US3930160A successfully refreshed from Google Patents.
US3930160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooved windows for scintillation crystals and light pipes of high refractive index
Assignee: Solon Technologies Inc
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Filing: 1974-02-11
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Granted: 1975-12-30
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Expires: 1994-02-11
Abstract
Abstract Scintillation crystals are disclosed which have improved resolution and pulse height. An improved crystal has shallow grooves or spot depressions cut in the window, usually an end surface. Typical grooves are about 1.5 mm wide and about .1 mm deep. The grooves may be either horizontal, generally parallel grooves in spaced apart relationship, or concentric rings in radially spaced apart relationship. A light pipe of high refractive index, such as a crystal of pure sodium iodide, may also be improved with shallow grooves or spot depressions cut in an end surface.
Inventors
- 👤 Carl F Swinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:06
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
In a crystal for use with light collection means coupled thereto, the improvement comprising a transparent scintillation crystal having at least one shallow groove or depression in the crystal light transmitting surface through which light generated within the crystal is transmitted to the light collection means.
Claim 2
Dependent Claim
46 words
In a crystal for use with light collection means coupled thereto, the improvement comprising a transparent scintillation crystal having at least one shallow groove or depression in the crystal light transmitting surface through which light generated within the crystal is transmitted to the light collection means.
Claim 3
Dependent Claim
37 words
The scintillation crystal of claim 1 wherein said groove or depression is substantially wider than it is deep, the depth of said groove or depression being in the range from about 0.001 in. to about 0.125 in.
Claim 4
Dependent Claim
34 words
The scintillation crystal of claim 1 including a plurality of shallow grooves or depressions in said crystal light transmitting surface through which light generated within the crystal is transmitted to the light collection means.
Claim 5
Dependent Claim
36 words
The scintillation crystal of claim 3 wherein each groove or depression is substantially wider than it is deep, the depth of said groove or depression being in the range from about 0.001 to about 0.125 in.
Claim 6
Dependent Claim
15 words
The scintillation crystal of claim 3 wherein said grooves are in parallel spaced apart relationship.
Claim 7
Dependent Claim
15 words
The scintillation crystal of claim 3 wherein said grooves are in radially spaced apart relationship.
Claim 8
Dependent Claim
20 words
The scintillation crystal of claim 3 wherein said depressions are indentations or spots in spaced apart relationship with one another.
Claim 9
Dependent Claim
14 words
The scintillation crystal of claim 3 wherein said grooves or depressions are randomly disposed.
Claim 10
Independent Claim
62 words
A method for improving the resolution and pulse height characteristics of a transparent scintillator crystal having a light transmitting window surface comprising cutting plural shallow grooves or depressions in said window surface, each groove or depression being substantially wider than it is deep, the depth of said groove or depression being in the range from about 0.001 in. to about 0.125 in.
Claim 11
Independent Claim
62 words
A method for improving the resolution and pulse height characteristics of a transparent scintillator crystal having a light transmitting window surface comprising cutting plural shallow grooves or depressions in said window surface, each groove or depression being substantially wider than it is deep, the depth of said groove or depression being in the range from about 0.001 in. to about 0.125 in.
References Cited (Backward Citations)
US3531651A
Cited
US3784819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |