US3729630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoluminescence readout instrument
Assignee: Panasonic Holdings Corp
•
Filing: 1971-01-26
•
Granted: 1973-04-24
•
Expires: 1991-01-26
Abstract
Abstract A thermoluminescence readout instrument utilizing a thermoluminescence dosimeter element which is heated by infrared rays from a laser source and which emits thermoluminescence, the thermoluminescence being transformed into a photocurrent so as to detect the dose irradiated on the element. The device is characterized by having good reproducibility in the heating of the element, providing good reproducibility and reliability of measurement, and a reduction of the time required for the measuring operation.
Inventors
- 👤 T Yamashita
- 👤 O Yamamoti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/10; G01T1/11; G01T1/115
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A thermoluminescence readout instrument for measuring the dose irradiated on a thermoluminescent dosimeter element comprising; a laser source for heating the element, means for leading laser light rays from said laser source to the element, means for transducing the thermoluminescEnce emitted from said thermoluminescent dosimeter element into a photocurrent, and means for indicating said photocurrent.
Claim 2
Dependent Claim
55 words
A thermoluminescence readout instrument for measuring the dose irradiated on a thermoluminescent dosimeter element comprising; a laser source for heating the element, means for leading laser light rays from said laser source to the element, means for transducing the thermoluminescEnce emitted from said thermoluminescent dosimeter element into a photocurrent, and means for indicating said photocurrent.
Claim 3
Dependent Claim
61 words
A thermoluminescence readout instrument according to claim 1, in which said laser source emits infrared light rays, the instrument further comprising optical means for shutting the infrared light rays in such a manner that the infrared light rays from said laser source are led to said thermoluminescent dosimeter element, but not to said means for transducing the thermoluminescence into a photocurrent.
Claim 4
Dependent Claim
24 words
A thermoluminescence readout instrument according to claim 1 wherein said laser source heats said thermoluminescent dosimeter element to a temperature of approximately 400* C.
Claim 5
Dependent Claim
32 words
A thermoluminescent readout instrument according to claim 3 wherein said thermoluminescent dosimeter element is heated to a temperature of approximately 400* C for a time interval of between 0.5 and 5.0 seconds.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |