[특허]Oxygen measurement using visible radiation

Oxygen measurement using visible radiation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-021/61
출원번호	US-0863315 (1986-05-15)
발명자 / 주소	Wong Jacob Y. (Santa Barbara CA)
출원인 / 주소	Hibshman Corporation (San Luis Obispo CA 02)
인용정보	피인용 횟수 : 24 인용 특허 : 0

초록 ▼

Apparatus for measuring the absorption of a gaseous sample and particularly suitable for measuring the concentration of gaseous oxygen makes use of a diode laser whose emission wavelength is adjacent to but spaced from the wavelength of a distinct absorption line. The diode drive current is altered to cause the junction temperature of the laser to change, thereby changing the wavelength of the emitted radiation and in effect scanning it through a range of wavelengths that includes the absorption line. The absorption is determined by a ratio technique and therefore is independent of changes in the laser output power level and drifts and changes in other parts of the optical system.

대표청구항 ▼

Apparatus for use in an instrument that measures the absorption of a sample by passing radiation through the sample, the sample having more than one absorption line including an absorption line at wavelength lo, said apparatus serving to positively identify the absorption line being measured as the absorption line at wavelength lo, said apparatus comprising: source means including a diode laser responsive to an applied electric current to produce radiation and emitting a part of that radiation in a first direction toward the sample, and emitting another part of that radiation in a second direction; a first detector positioned to receive radiation that was emitted in the first direction after it has passed through the sample, and generating a first electrical signal related to the intensity of the radiation received by said first detector; a filter positioned to intercept the radiation emitted in said direction and having a narrow rejection band centered at wavelength lo and substantially transmitting radiation of wavelengths outside the narrow rejection bank; a second detector positioned to receive radiation that has passed through said filter, and generating a second electrical signal related to the intensity of the radiation received by said second detector; first means connected to said diode laser for scanning the wavelength of the radiation emitted through a wavelength interval in a continuous manner; and, second means, connected to said first means and to said second detector, and responsive to the second electrical signal generated by said second detector to determine at what instant in the scanning the wavelength of the radiation emitted by said diode laser equals lo.

이 특허를 인용한 특허 (24)

McCaul Bruce W. (1370 Lincoln Ave. Palo Alto CA 94301) Doggett David E. (Sunnyvale CA), Gas spectroscopy.
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McCaul Bruce W. ; Doggett David E., Gas spectroscopy.
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Wong Jacob Y. (Santa Barbara CA), Gaseous nitrogen detection using excited-state laser spectroscopy.
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Goldstein Neil (Medford MA) Bien Fritz (Concord MA) Bernstein Lawrence (Lexington MA), Gaseous species absorption monitor.
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Black ; deceased Karl H. ; Armstrong Walter I., Infrared method and apparatus for measuring gas concentration of a plurality of component gases in a sample.
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Brand Joel A. ; Monlux Garth A. ; Zmarzly Patrick ; Fetzer Gregory J. ; Halsted Benjamin C. ; Groff Kenneth W. ; Lee Jamine ; Goldstein Neil ; Richtsmeier Steven ; Bien Fritz, Method and apparatus for in situ gas concentration measurement.
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Walker Stephen D. ; Nichols Robert A. ; Curnan William A. ; Svai Sophat ; Braig James R. ; Goldberger Daniel S., Method and apparatus for measuring gas concentration using a semiconductor laser.
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Niiranen, Kai; Niemi, Miikkael; Syrjälahti, Mikko, Method and device for determining gas component inside a transparent container.
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Nagano,Kazuhiko; Okazaki,Yoji, Method for stabilizing optical output of semiconductor laser.
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Sterling, Bernhard B.; Braig, James R.; Goldberger, Daniel S.; Hartstein, Philip C.; Gaffney, Robert D., Method of determining an analyte concentration in a sample from an absorption spectrum.
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Sterling,Bernhard B.; Braig,James R.; Goldberger,Daniel S.; Witte,Kenneth G., Method of determining an analyte concentration in a sample from an absorption spectrum.
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Sterling, Bernhard B.; Braig, James R.; Goldberger, Daniel S.; Hartstein, Philip C.; Gaffney, Robert D., Method of determining analyte concentration in a sample using infrared transmission data.
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Sterling,Bernhard B.; Braig,James R.; Goldberger,Daniel S.; Hartstein,Philip C.; Gaffney,Robert D., Method of determining analyte concentration in a sample using infrared transmission data.
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Mace,Leslie E.; Labuda,Lawrence L.; Blazewicz,Perry R.; Rich,David R.; Jaffe,Michael B.; Orr,Joseph A.; Kofoed,Scott A., Multiple function airway adapter.
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Wong Jacob Y. (Santa Barbara CA), Non-contact respiration rate and apnea monitor using pulmonary gas exchange technique.
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Dakin John P. (Hampshire GB2), Optical sensing arrangements.
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Hayashi,Shigeo, Optical transmitting module and a method for controlling the same.
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Froehlich, Ulf; Wapelhorst, Eric, Optimization of the laser operating point in a laser absorption spectrometer.
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Labuda Lawrence L. ; Blazewicz Perry R. ; Mace Leslie E. ; Apperson Jerry R. ; Cooke Walter A., Oxygen monitoring and apparatus.
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Labuda, Lawrence L.; Blazewicz, Perry R.; Mace, Leslie E.; Apperson, Jerry R.; Cooke, Walter A., Oxygen monitoring apparatus.
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Labuda, Lawrence L.; Blazewicz, Perry R.; Mace, Leslie E.; Apperson, Jerry R.; Cooke, Walter A., Oxygen monitoring apparatus.
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Blazewicz, Perry R.; Mace, Leslie E.; Apperson, Jerry R.; Khalil, Gamal-Eddin, Oxygen monitoring methods and apparatus (I).
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Sterling,Bernhard B.; Braig,James R.; Goldberger,Daniel S.; Hartstein,Philip C.; Gaffney,Robert D., Pathlength-independent methods for optically determining material composition.
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Bachur, Jr.,Nicholas R.; Beaty,Patrick S.; Foley,Timothy G., System and method for optically monitoring the concentration of a gas, or the pressure, in a sample vial to detect sample growth.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Oxygen measurement using visible radiation 원문보기

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연구과제 타임라인

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Oxygen measurement using visible radiation 원문보기

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이 특허를 인용한 특허 (24)

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