Patent US2852694A successfully refreshed from Google Patents.
Patent US4710033A successfully refreshed from Google Patents.
US4710033A
Expired / Lapsed
US
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Temperature measurement system
Assignee: Omron Corp
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Filing: 1985-05-28
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Granted: 1987-12-01
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Expires: 2005-05-28
Abstract
Abstract A fluorescent material arranged under an environment of temperature objective for measurement is excited by irradiating red color light or infrared rays, then fluorescent light generated from the fluorescent material is received by an optical sensor thus the temperature of the fluorescent material is measured from an output of the optical sensor on the basis of the correlation between a fluorescent characteristic of the fluorescent material and temperature.
Inventors
- 👤 Masao Hirano
- 👤 Mitsutaka Kato
- 👤 Hirohiko Yasuda
- 👤 Seisuke Hinoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:34
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/32; G01K11/3206; G01K11/3213
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A temperature measurement system comprising: a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material including one of the active rare earth substances chosen from the group consisting of Yb, Er, Tm, and Ho and one of the parent substances chosen from the group consisting of GdF 3 , LaF 3 , YF 3 , LuF 3 , CaF 2 , BaF 2 , BaYF 5 , NaLuF 4 and Y 3 OCl 7 ; means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material; means for receiving emitted light and detecting the intensity thereof; and means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
Claim 2
Dependent Claim
143 words
A temperature measurement system comprising: a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material including one of the active rare earth substances chosen from the group consisting of Yb, Er, Tm, and Ho and one of the parent substances chosen from the group consisting of GdF 3 , LaF 3 , YF 3 , LuF 3 , CaF 2 , BaF 2 , BaYF 5 , NaLuF 4 and Y 3 OCl 7 ; means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material; means for receiving emitted light and detecting the intensity thereof; and means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
Claim 3
Dependent Claim
101 words
A temperature measurement system comprising: a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material chosen from the group consisting of NdP 5 O 14 , and Li(Nd, Yb)P 4 O 12 ; means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material; means for receiving emitted light and detecting the intensity thereof; and means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
Claim 4
Dependent Claim
101 words
A temperature measurement system comprising: a phosphorescent material adapted for placement in an environment the temperature of which is to be measured, said material chosen from the group consisting of NdP 5 O 14 , and Li(Nd, Yb)P 4 O 12 ; means for exciting said material to emit phosphorescent light, said exciting means comprising a light emitting diode for irradiating said material with infrared radiation to excite said material; means for receiving emitted light and detecting the intensity thereof; and means for integrating the value of intensity for a given time only following cessation of excitation to determine said temperature.
References Cited (Backward Citations)
US3599109A
Cited
US3654463A
Cited
US4047033A
Cited
US4043860A
Cited
US4198567A
Cited
US4215275A
Cited
US4223226A
Cited
US4245507A
Cited
GB2064107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |