EP1086365A1 - PROCEDE POLARIMETRIQUE POUR LA DETERMINATION DU PLAN D'OSCILLATION (PRINCIPAL) DE LA LUMIERE POLARISEE SUR ENVIRON 0,1 mo, ET DISPOSITIF MINIATURISABLE POUR SA MISE EN OEUVRE - Google Patents
PROCEDE POLARIMETRIQUE POUR LA DETERMINATION DU PLAN D'OSCILLATION (PRINCIPAL) DE LA LUMIERE POLARISEE SUR ENVIRON 0,1 mo, ET DISPOSITIF MINIATURISABLE POUR SA MISE EN OEUVREInfo
- Publication number
- EP1086365A1 EP1086365A1 EP99929174A EP99929174A EP1086365A1 EP 1086365 A1 EP1086365 A1 EP 1086365A1 EP 99929174 A EP99929174 A EP 99929174A EP 99929174 A EP99929174 A EP 99929174A EP 1086365 A1 EP1086365 A1 EP 1086365A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- plane
- angle
- polarization
- oscillation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000010355 oscillation Effects 0.000 title claims abstract description 15
- 230000010287 polarization Effects 0.000 claims description 23
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 20
- 239000008103 glucose Substances 0.000 claims description 20
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- 206010012601 diabetes mellitus Diseases 0.000 description 4
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- 102000004190 Enzymes Human genes 0.000 description 2
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- 208000013016 Hypoglycemia Diseases 0.000 description 2
- 102000004877 Insulin Human genes 0.000 description 2
- 108090001061 Insulin Proteins 0.000 description 2
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- XDIYNQZUNSSENW-UUBOPVPUSA-N (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O XDIYNQZUNSSENW-UUBOPVPUSA-N 0.000 description 1
- 201000004569 Blindness Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
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- 150000002303 glucose derivatives Chemical class 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 201000001421 hyperglycemia Diseases 0.000 description 1
- 230000002218 hypoglycaemic effect Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
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- 230000002427 irreversible effect Effects 0.000 description 1
- 230000003907 kidney function Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
- G01J4/04—Polarimeters using electric detection means
Definitions
- the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 10 for carrying it out
- the human diabetes (diabetes mellitus) is characterized by a disturbed regulation of the metabolism of glucose (glucose) in the body with constantly or sporadically increased (hyperglycemia), in the case of infections also suddenly reduced (hypoglycemia) concentrations (levels) of this substance in the blood and in the body fluids
- hyperglycemia hypoglycemia
- concentrations levels
- An excessively high blood sugar level causes a series of pathological changes, especially in the blood vessels, which then lead to sometimes extremely serious complications - such as blindness, loss of kidney functions, heart attacks and dying limbs (gangrane) - and an excessively low blood sugar level leads in particular to the irreversible Decline of nerve cells
- the therapy of diabetes mellitus requires that the glucose level is constantly adjusted to values in a suitable range and includes, at least in the case of more severe forms, the administration of the body's own hormone if the values are too high Insulin, the effect of which is to lower the level of glucose in the body and,
- optical rotation that is, the rotation of the plane of oscillation of polarized light by optically active substances, which also includes dissolved glucose.
- optical rotation depends both on the concentration of the substance and on the length of the light through the solution.
- the concentration of the substance can be determined via the angle of rotation.
- concentration of the substance to be measured is low, either the light path can be lengthened in a suitable manner in order to achieve an increase in the angle of rotation, and / or the sensitivity of the sensor must be increased. Both alternatives lead to problems in particular when the measuring device is to be miniaturized.
- the aim of the present invention is a method for the determination of very small angles of rotation, the characteristics of which are sufficient for the development of an implantable glucose sensor
- EP 0030610 B1 contains a further development of DE 2724543 C2, a pola ⁇ meter for determining small angles of rotation (from which a glucose sensor could be developed).
- the method is based on the reflection of a polarized light beam on an optically denser medium (a plane-parallel plate, for example)
- the intensities of the reflected and the refracted partial beam lies between the critical angle of total reflection and the polarization angle.
- an additional polarization filter is inserted in each of the two partial beams.Therefore, the signal processing takes place with parts of the total intensity
- EP 0123057 A1 and EP 0153313 B1 likewise describe a method for polarization.
- An optical line grating serves as the beam part, this produces several partial beams.
- Information dependent on the plane of polarization of the light emerging from the sample results from the reduced light intensity of a test beam after passage of one used as an analyzer Polarization filter A quotient is formed from the signals of the intensity detectors in the reference and in the test beam, as a relative signal of the test beam detector signal, in order to eliminate the interference influence of a varying total light intensity
- the sensor should make it possible to determine the plane of oscillation of polarized light with an accuracy of 0.3 m ° (m 3 milligrad) (the entire optical rotation through glucose in physiological concentration (approx
- the sensor should preferably not contain any moving parts, since the mechanics are subject to wear, which can cause malfunctions
- the sensor signal must not be influenced by the optical permeability of the material to be measured, since body fluids can significantly change their extinction - for example, in the case of jaundice (jaundice). It must therefore be a real polarization and not a polarization photometer
- the problems outlined are solved by a combination of a two-stage process of measurement magnification and detection with a subsequent special measurement signal processing.
- the measurement-large optical rotation is achieved by a reflection of the measurement beam on a suitable surface, which can also be carried out several times in succession amplified, in the second stage by beam splitting in a polarization, the detection of the (orthogonal) components of the total intense intensity, the measurement signals of which are subsequently processed electronically to a ratio independent of the light absorption of the measured material as a further amplified measure of optical rotation
- the factor C takes on very large values.
- the total intensity of the reflected light increases with increasing angle ⁇ increases (ie the intensity reduction in the measuring arrangement is smaller), an angle of incidence> ⁇ p is selected in the close range around ⁇ p
- the sensitivity of the arrangement is the first derivative (d ⁇ r / d ⁇ e ) of this function
- Second amplification, detection and implementation of the pure polarization The further increase in signal sensitivity achieved according to the invention and the detection without moving parts is achieved with a polarization beam splitter (a polarization prism).
- the light is in this prism in two partial beams (ordinary beam and extraordinary beam ), the polarization planes of which are perpendicular to one another, broken down
- the intensities of these partial beams are measured and the quotient of the values is formed, then the rotation of the oscillation plane is determined by means of a calibration curve.
- the quotient has the required property to be a signal which is subject to changes in the Total light intensity, regardless of whether it is caused by fluctuations in the lamp power or by changes in the light transmission of the material to be measured.
- the large dQ / d ⁇ e determines the sensitivity with which the angle of rotation of the measured material ⁇ MG can be determined.
- the sensitivity depends on the factor C and the angular functions aD consequently it is also due to the choice of both the factor C (via ⁇ e ⁇ Angle of incidence et the reflection) as well as the angles ⁇ e and ⁇ * ei ⁇ stell- and optimiemar
- modulation of the light for example the amplitude and / or the frequency, for example the light source is a laser diode, controlled by an oscillator
- demodulation for example by a "Lock-in" amplifier of the quotient signal
- a further reference signal for compensating for absorption sound effects in the material to be measured and for SchwanKu ⁇ gen the total intensity of the emitted light from the light source can be obtained by the intensity ⁇ es of the partial beam, which is not reflected during the first amplification (reflection on a surface), but is refracted and broken through the glass kicks, if necessary it is detected.
- the sum of all three detector signals can be used for feedback on the supply of the light source
- the method shown fulfills all of the above-mentioned requirements for a miniaturizable polarimeter for the development of an implantable glucose sensor.
- the angle signal does not depend on absorption of the light in the material to be measured
- the calibration curve Q f ( ⁇ e ) required for the determination of the angle of rotation can be created in a simple manner by replacing the cuvette containing the material to be measured by a rotatable polarization filter, which is rotated by small amounts - for example 10 m ° in each case - and the respective one associated quotient is determined.
- the light from a light source (1) is polarized with the aid of a polarization filter (2), which has a certain setting angle ⁇ 0 to the first reference plane, the plane of incidence on the reflecting surface (4).
- the polarized beam (12) penetrates the material to be measured in the measuring chamber (3), changing the angle of rotation by the small angle ⁇ MG
- the sum of ⁇ 0 and ⁇ G gives the angle of rotation ⁇ e with which the beam (13) emerging from the measuring chamber is partially reflected on the surface of an optically denser medium (4).
- the reflected partial beam is then reflected in a polarization 5), whose reference plane, the oscillation plane of the ordinary beam, has a certain angle of incidence ( ⁇ * ) to the first reference plane, divided into two partial beams (15a extraordinary beam, 15b ordinary beam), whose oscillation planes are exactly perpendicular to each other.
- the intensities l 0 and l a of the two partial beams are determined photometrically by detectors (6a, 6b) and the quotient (Q) of the measured intensities is formed (quotient generator 8).
- the polarized light (12) can be generated by a modulator (9, eg the light source (1)) Laser diode, controlled by an oscillator (9)) modulated and the quotient signal accordingly (10, eg by a "lock-in” amplifier) demo be dulated
- the intensity of the partial beam (15c), which is not reflected during the first amplification (reflection on a surface) but is refracted and passes through the glass, can also be detected (detector 6c, amplifier 7c)
- the light source (1) is an unpolarized green helium-neon laser ("Model 1652", UNIPHASE, Kunststoff) with a wavelength of 543.5 nm and an output of 0.25 mW.
- the reflecting surface (4) belongs to a prism made of glass" BK 7 "(SPINDLER & HOYER, Gottingen), the surface normal and the incident light beam form an angle ⁇ of 60 °.
- the following beam splitter p ⁇ sma (5, "GLAN-LASER - polarization p ⁇ sma with two exit windows", SPINDLER & HOYER, Gottingen), its vibration level of the ordinary beam (15b) and the vibration level of the incident Light (14) forms an angle of 15.0 ° in the basic setting mentioned, divides the reflected partial beam.
- This error can be reduced by approximately an order of magnitude simply by the well-known modulation of the light beam and appropriate demodulation of the end signal
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Dans un procédé et un dispositif pour la détermination très précise du plan d'oscillation de la lumière polarisée, la lumière d'une source de lumière (1) est polarisée à l'aide d'un filtre de polarisation (2) présentant un angle de réglage theta o déterminé par rapport au premier plan de référence, à savoir le plan d'incidence sur la surface (4) réfléchissante. Le faisceau polarisé (12) traverse l'objet à mesurer dans la chambre de mesure (3), et l'angle de rotation varie alors d'une faible valeur angulaire theta MG. La somme de theta o et de theta MG donne l'angle de rotation theta e avec lequel le faisceau (13) sortant de la chambre de mesure est réfléchi partiellement au niveau de la surface d'un milieu (4) optiquement plus dense. Le faisceau partiel réfléchi est ensuite décomposé, dans un prisme de polarisation (5) dont le plan de référence, à savoir le plan d'oscillation du rayon ordinaire, présente un angle de réglage ( theta <*>) déterminé par rapport au premier plan de référence, en deux rayons partiels (15a: rayon extraordinaire, 15b: rayon ordinaire) dont les plans d'oscillation sont exactement perpendiculaires l'un à l'autre. Les intensités Io et Ia des deux rayons partiels sont déterminées par voie photométrique au moyen de détecteurs (6a, 6b) et le quotient (Q) des intensités mesurées est formé (formateur de quotient: 8).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19826294A DE19826294C1 (de) | 1998-06-12 | 1998-06-12 | Polarimetrisches Verfahren zur Bestimmung der (Haupt-)Schwingungsebene polarisierten Lichts auf etwa 0,1m DEG und miniaturisierbare Vorrichtung zu seiner Durchführung |
DE19826294 | 1998-06-12 | ||
PCT/EP1999/004015 WO1999066309A1 (fr) | 1998-06-12 | 1999-06-11 | PROCEDE POLARIMETRIQUE POUR LA DETERMINATION DU PLAN D'OSCILLATION (PRINCIPAL) DE LA LUMIERE POLARISEE SUR ENVIRON 0,1 m°, ET DISPOSITIF MINIATURISABLE POUR SA MISE EN OEUVRE |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1086365A1 true EP1086365A1 (fr) | 2001-03-28 |
Family
ID=7870741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99929174A Withdrawn EP1086365A1 (fr) | 1998-06-12 | 1999-06-11 | PROCEDE POLARIMETRIQUE POUR LA DETERMINATION DU PLAN D'OSCILLATION (PRINCIPAL) DE LA LUMIERE POLARISEE SUR ENVIRON 0,1 mo, ET DISPOSITIF MINIATURISABLE POUR SA MISE EN OEUVRE |
Country Status (7)
Country | Link |
---|---|
US (1) | US6577393B1 (fr) |
EP (1) | EP1086365A1 (fr) |
JP (1) | JP2002518669A (fr) |
CN (1) | CN1305586A (fr) |
AU (1) | AU4607499A (fr) |
DE (1) | DE19826294C1 (fr) |
WO (1) | WO1999066309A1 (fr) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6304766B1 (en) | 1998-08-26 | 2001-10-16 | Sensors For Medicine And Science | Optical-based sensing devices, especially for in-situ sensing in humans |
AU770909B2 (en) | 1998-08-26 | 2004-03-04 | Sensors For Medicine And Science, Inc. | Optical-based sensing devices |
DE10020613C2 (de) * | 2000-04-27 | 2002-02-28 | Glukomeditech Ag | Verfahren zur langzeitstabilen und gut reproduzierbaren polarimetrischen Messung der Konzentrationen der Bestandteile wässriger Lösungen sowie Vorrichtung zur Durchführung dieses Verfahrens |
DE10020615C2 (de) * | 2000-04-27 | 2002-02-28 | Glukomeditech Ag | Verfahren zur langzeitstabilen und gut reproduzierbaren spektrometrischen Messung der Konzentrationen der Bestandteile wässriger Lösungen sowie Vorrichtung zur Durchführung dieses Verfahrens |
DE10124773C2 (de) | 2001-05-21 | 2003-11-06 | Osram Opto Semiconductors Gmbh | Polarisationsdetektor und Verfahren zu dessen Herstellung |
DE10321356A1 (de) * | 2003-05-13 | 2004-12-23 | Ses-Entwicklung Gmbh | Verfahren zur reflexions-polarimetrischen Bestimmung der Konzentration optisch aktiver Bestandteile in Medien sowie eine Vorrichtung zur Durchführung dieses Verfahrens |
CA2998199A1 (fr) | 2004-06-01 | 2005-12-15 | Kwalata Trading Limited | Procedes destines a etre utilises avec des cellules souches impliquant la culture sur une surface avec des anticorps |
EP2532356A1 (fr) | 2004-07-14 | 2012-12-12 | Glusense Ltd. | Sources d'alimentation implantables et capteurs |
US7308292B2 (en) | 2005-04-15 | 2007-12-11 | Sensors For Medicine And Science, Inc. | Optical-based sensing devices |
TW200734462A (en) | 2006-03-08 | 2007-09-16 | In Motion Invest Ltd | Regulating stem cells |
CN101427125B (zh) * | 2006-04-18 | 2011-09-14 | 皇家飞利浦电子股份有限公司 | 光学测量设备 |
JP4902272B2 (ja) * | 2006-06-06 | 2012-03-21 | エスアイアイ・ナノテクノロジー株式会社 | 蛍光x線分析装置 |
DE102007032849A1 (de) * | 2007-03-16 | 2008-09-18 | Biocomfort Diagnostics Gmbh | Messeinrichtung und Verfahren zur optischen Konzentrationsbestimmung von Blutzucker und/oder Laktat in biologischen Systemen |
US7623242B2 (en) * | 2007-06-21 | 2009-11-24 | Gideon Eden | Device and method for monitoring multiple chemical samples with a fluorescent tube |
US20100160749A1 (en) * | 2008-12-24 | 2010-06-24 | Glusense Ltd. | Implantable optical glucose sensing |
US9037205B2 (en) | 2011-06-30 | 2015-05-19 | Glusense, Ltd | Implantable optical glucose sensing |
RU2527654C2 (ru) * | 2012-03-20 | 2014-09-10 | федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е.Жуковского и Ю.А.Гагарина" (г.Воронеж) | Способ определения отклонения угла наклона плоскости поляризации оптического излучения |
CN103162836B (zh) * | 2013-03-15 | 2015-02-25 | 北京航空航天大学 | 一种光偏振微小转角的光学干涉检测装置及方法 |
BR112016015649A2 (pt) * | 2014-03-07 | 2017-08-08 | Halliburton Energy Services Inc | Dispositivo e método de computação óptica para determinar uma característica de uma amostra |
CN104048922A (zh) * | 2014-06-26 | 2014-09-17 | 北京理工大学 | 一种荧光光谱偏振度和偏振角的测量方法 |
CN106999118B (zh) | 2014-10-13 | 2020-07-17 | 葡萄糖传感器公司 | 分析物感测装置 |
US10871487B2 (en) | 2016-04-20 | 2020-12-22 | Glusense Ltd. | FRET-based glucose-detection molecules |
KR102005832B1 (ko) * | 2018-02-21 | 2019-08-01 | 주식회사 올리브헬스케어 | 생체 신호를 분석하는 신호 처리 장치 및 이를 이용한 생체 신호 분석 장치 |
IL273038B (en) | 2020-03-03 | 2022-02-01 | Ben Zion Karmon | bone graft |
CN112577928B (zh) * | 2020-11-24 | 2022-03-22 | 北京邮电大学 | 一种基于TDBCs-Kretschmann的高灵敏度手性分子检测结构设计方法 |
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DE2724543C2 (de) * | 1977-05-31 | 1982-05-13 | Arno Dipl.-Phys. Dr. 7900 Ulm Müller | Anwendung eines polarimetrischen Verfahrens zur quantitativen Bestimmung der Blutglucose |
DE2944113A1 (de) * | 1979-10-31 | 1981-05-14 | Arno Dipl.-Phys. Dr. 7900 Ulm Müller | Verfahren und vorrichtung zur quantitativen absolutbestimmung optisch aktiver substanzen |
US4467204A (en) * | 1982-02-25 | 1984-08-21 | American Crystal Sugar Company | Apparatus and method for measuring optically active materials |
AU2650484A (en) * | 1983-02-25 | 1984-09-10 | Richard Distl | Multibeam measuring device |
AU590223B2 (en) | 1984-09-26 | 1989-11-02 | Apm Limited | Concentration meter |
EP0351659B1 (fr) * | 1988-07-19 | 1993-02-10 | Siemens Aktiengesellschaft | Procédé et dispositif pour mesurer la concentration d'un matériau actif optique |
-
1998
- 1998-06-12 DE DE19826294A patent/DE19826294C1/de not_active Expired - Fee Related
-
1999
- 1999-06-11 CN CN99807278A patent/CN1305586A/zh active Pending
- 1999-06-11 WO PCT/EP1999/004015 patent/WO1999066309A1/fr not_active Application Discontinuation
- 1999-06-11 AU AU46074/99A patent/AU4607499A/en not_active Abandoned
- 1999-06-11 EP EP99929174A patent/EP1086365A1/fr not_active Withdrawn
- 1999-06-11 US US09/719,388 patent/US6577393B1/en not_active Expired - Fee Related
- 1999-06-11 JP JP2000555078A patent/JP2002518669A/ja active Pending
Non-Patent Citations (1)
Title |
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See references of WO9966309A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999066309A1 (fr) | 1999-12-23 |
US6577393B1 (en) | 2003-06-10 |
JP2002518669A (ja) | 2002-06-25 |
AU4607499A (en) | 2000-01-05 |
CN1305586A (zh) | 2001-07-25 |
DE19826294C1 (de) | 2000-02-10 |
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