US5081358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector of fourier transform infrared spectrometer
Assignee: Shimadzu Corp
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Filing: 1990-12-27
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Granted: 1992-01-14
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Expires: 2010-12-27
Abstract
Abstract A detector comprising a pyroelectric detector, a temperature control mechanism including a thermoelectric heating/cooling element for keeping the temperature of the pyroelectric detector constant, a temperature sensor, and a temperature controller responsive to the detection signal from the temperature sensor for controlling power supply to the thermoelectric heating/cooling element, and control unit provided within the temperature controller for pyroelectric detector. Synchronizing the operation of the pyroelectric detector and the thermoelectric heating/cooling element such that the power supply of the thermoelectric heating/cooling element is turned on and off only when data is not being collected by the pyroelectric detector.
Inventors
- 👤 Osamu Yoshikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:54
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/34; G01J5/35; G01J5/70; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/20; G01J5/02; G01J5/06; G01J5/061; G01J2005/063; G01J3/00; G01J3/28; G01J3/45; G01J3/453
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A detector comprising: pyroelectric detector means for detecting pyroelectricity; thermoelectric heating/cooling means for keeping the temperature of said pyroelectric detector means constant; temperature sensor means for sensing the temperature of said pyroelectric detector means; temperature controller means responsive to a detection signal from said temperature sensor means for controlling a power supply to said thermoelectric heating/cooling means; and control unit means provided within said temperature controller means for synchronizing the operation of said pyroelectric detector means and said thermoelectric heating/cooling means such that the power supply of said thermoelectric heating/cooling means is turned on and off only when data is not being collected by said pyroelectric detector means.
Claim 2
Dependent Claim
108 words
A detector comprising: pyroelectric detector means for detecting pyroelectricity; thermoelectric heating/cooling means for keeping the temperature of said pyroelectric detector means constant; temperature sensor means for sensing the temperature of said pyroelectric detector means; temperature controller means responsive to a detection signal from said temperature sensor means for controlling a power supply to said thermoelectric heating/cooling means; and control unit means provided within said temperature controller means for synchronizing the operation of said pyroelectric detector means and said thermoelectric heating/cooling means such that the power supply of said thermoelectric heating/cooling means is turned on and off only when data is not being collected by said pyroelectric detector means.
Claim 3
Dependent Claim
72 words
The detector of claim 1, wherein said control unit means starts and shuts off the power supply to said thermoelectric heating/cooling means in synchronization with an end-of-conversion signal from an A/D converter for converting said detection signal of said pyroelectric detector means into a digital signal, in synchronization with an inferential signal from a control interferometer, or in synchronization with a turn of a moving mirror after collecting a series of interferograms.
Claim 4
Dependent Claim
20 words
The detector of claim 1, wherein said thermoelectric heating/cooling means comprises a thermoelectric heating element and a thermoelectric cooling element.
Claim 5
Dependent Claim
15 words
The detector of claim 1, wherein said thermoelectric heating/cooling means comprises a single thermoelectric element.
Claim 6
Dependent Claim
20 words
The detector of claim 4, wherein said temperature controller means comprises two comparators, and two single-ended push pull amplification circuits.
Claim 7
Dependent Claim
39 words
The detector of claim 5, wherein said temperature controller means further comprises a protective circuit interposed between said two comparators and said two single-ended push pull amplification circuits for protecting transistor means in said single-ended push pull amplification circuits.
References Cited (Backward Citations)
US4950900A
Cited
US4990782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |