radiometer

　 　

WordNet

1. meter to detect and measure radiant energy (electromagnetic or acoustic)
2. electromagnetic radiometer consisting of a small paddlewheel that rotates when placed in daylight

PrepTutorEJDIC

1. ラジオメーター,放射計

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/07/29 17:42:01」(JST)

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An example of a Crookes radiometer. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.

A radiometer or roentgenometer is a device for measuring the radiant flux (power) of electromagnetic radiation. Generally, a radiometer is an infrared radiation detector or ultraviolet detector.

The name Radiometer is frequently used to refer to a Crookes radiometer ("light-mill"), an early model device wherein a rotor (having vanes which are dark on one side, and light on the other) in a partial vacuum spins when exposed to light. A common myth (one originally held even by Crookes) is that the momentum of the absorbed light on the black faces makes the radiometer operate. If this were true however, the radiometer would spin away from the non-black faces, since the photons bouncing off those faces impart even more momentum than the photons absorbed on the black faces. Photons do exert radiation pressure on the faces, but those forces are dwarfed by other effects. The final explanation depends on having just the right degree of vacuum, and is more related to the flow of heat than the direct effect of photons.

The Nichols radiometer operates on a different principle and is more sensitive than the Crookes type.

A microwave radiometer operates in the microwave wavelengths. The radiometer contains argon gas to enable it to rotate.

The MEMS radiometer, invented by Patrick Jankowiak, can operate on the principles of Nichols or Crooke and can operate over a wide spectrum of wavelength and particle energy levels.

See also

• Radiation pressure
• Net radiometer
• Bolometer
• Pyranometer
• Radiometry
• Spectroradiometer
• Copernicus
• Solar sail
• Photon rocket
• Active cavity radiometer

References

External links

• https://www.youtube.com/watch?v=teEhoUB-FQE&list=UUXrJjdDeqLgGjJbP1sMnH8A Short video pertinent to the topic.

English Journal

• The danger of using inappropriate point-of-care glucose meters in patients on icodextrin dialysis.

• Perera NJ, Stewart PM, Williams PF, Chua EL, Yue DK, Twigg SM.SourceDiabetes Centre, Department of Endocrinology Department of Clinical Biochemistry, Royal Prince Alfred Hospital, Sydney Discipline of Medicine, University of Sydney, NSW, Australia.
• Diabetic medicine : a journal of the British Diabetic Association.Diabet Med.2011 Jun 16. doi: 10.1111/j.1464-5491.2011.03362.x. [Epub ahead of print]
• Aims:? Icodextrin is a glucose polymer used to maintain an osmotic gradient in peritoneal dialysis. Metabolites of icodextrin are known to cause overestimation of blood glucose in glucose meters using glucose dehydrogenase/pyrroloquinolinequinone systems. The aim of this study is to determine the
• PMID 21679233

• Perchlorate (Irenat(R)) may falsely lower measured ionised calcium.

• Gruber M, Nehring C, Creutzenberg M, Graf B, Hopf S.SourceDepartment of Anesthesiology, University of Regensburg, Regensburg, Germany.
• Clinical chemistry and laboratory medicine : CCLM / FESCC.Clin Chem Lab Med.2011 Jun;49(6):1019-24. Epub 2011 Mar 24.
• Abstract Background: Discrepancies in ionised calcium concentrations between results from several point-of-care devices derived from intensive care unit (ICU) patients were postulated to be caused by perchlorate, a thyroid blocking agent. The deviations were serious concerning the diagnosis of hyper
• PMID 21428857

Japanese Journal

• マイクロ波帯雑音温度測定用ラジオメータのBタイプ不確かさ評価

• 飯田 仁志,島田 洋蔵,小見山 耕司
• 電気学会論文誌Ａ（基礎・材料・共通部門誌） 131(4), 231-238, 2011
• … We have developed a total-power radiometer to establish a noise standard for the national metrology standards in the frequency range of 18-26.5 GHz. … The radiometer is based on the heterodyne scheme working on the intermediate frequency (IF) of 30 MHz. …
• NAID 130000653426

• GPM主衛星搭載二周波降水レーダの開発状況(宇宙応用シンポジウム?小型衛星から宇宙ステーション関連システムの開発・運用成果?)

• 三浦 健史,小嶋 正弘,古川 欣司,石切 孝之,百束 泰俊,井口 俊夫,花土 弘,中川 勝広
• 電子情報通信学会技術研究報告. SANE, 宇宙・航行エレクトロニクス 110(92), 133-138, 2010-06-17
• 全球降水観測計画(GPM)は,レーダとマイクロ波放射計を搭載した主衛星とマイクロ波放射計を搭載した副衛星群のデータを組み合わせ,全地球の降水量を高精度に高時間・空間分解能で観測する計画である.主衛星は日米共同開発で,中心センサーとなる二周波降水レーダ(DPR)の開発は日本(JAXAとNICT)で実施している.本講演ではDPR開発状況について報告する.
• NAID 110007890409

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