EP1285254A1 - Refraktometer - Google Patents
RefraktometerInfo
- Publication number
- EP1285254A1 EP1285254A1 EP01943151A EP01943151A EP1285254A1 EP 1285254 A1 EP1285254 A1 EP 1285254A1 EP 01943151 A EP01943151 A EP 01943151A EP 01943151 A EP01943151 A EP 01943151A EP 1285254 A1 EP1285254 A1 EP 1285254A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- receiver
- refractometer
- optical element
- measuring surface
- measuring
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
- G01N2021/436—Sensing resonant reflection
- G01N2021/438—Sensing resonant reflection with investigation of wavelength
Definitions
- the invention relates to a refractometer with a measuring prism on the measuring surface of which a sample to be examined can be applied, which can be illuminated by a beam of light emanating from a white light source under such an angular range that the critical angle for total reflection is also contained therein, and a receiver on the the reflected radiation hits.
- Refractometers are used to measure the refractive index of liquid, solid or gaseous substances.
- total reflectometers such as the Abbe refractometer
- the critical angle of total reflection is determined using a measuring prism with a known refractive index, which is brought into optical contact with the substance to be tested.
- the object of the invention is to improve a refractometer, such as, for example, the Abbe refractometer, with simple means with regard to its meaningfulness about a substance to be examined.
- This object is achieved according to the invention in that an optical element which breaks it down into a color spectrum is arranged in the beam path of the reflected radiation between the measuring surface and the receiver.
- the dispersion that occurs is not eliminated again by an oppositely acting prism, but the color spectrum can be used to generate intensity curves for different wavelengths. If you then use a two-dimensional diode array for detection, the columns correspond to the different wavelengths and the position of the light-dark edge within the individual column depends on the refractive index at the respective wavelength. The refractive index can thus be represented as a function of the wavelength.
- the use of the CCD arrays has another advantage.
- the drawing shows in simplified form the structure of the refractometer, specifically with the white light source 1, the measuring prism 2 and the sample 3 on the measuring surface of the prism.
- the lens systems are only indicated with 4 here.
- An optical element 6 generating a spectrum is provided between the measuring prism and the receiver 5, for example a grating or a straight-view prism.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10025789A DE10025789A1 (de) | 2000-05-19 | 2000-05-19 | Refraktometer |
DE10025789 | 2000-05-19 | ||
PCT/DE2001/001992 WO2001088506A1 (de) | 2000-05-19 | 2001-05-18 | Refraktometer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1285254A1 true EP1285254A1 (de) | 2003-02-26 |
Family
ID=7643448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01943151A Withdrawn EP1285254A1 (de) | 2000-05-19 | 2001-05-18 | Refraktometer |
Country Status (4)
Country | Link |
---|---|
US (1) | US6876444B2 (de) |
EP (1) | EP1285254A1 (de) |
DE (1) | DE10025789A1 (de) |
WO (1) | WO2001088506A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7006209B2 (en) * | 2003-07-25 | 2006-02-28 | Advanced Micro Devices, Inc. | Method and apparatus for monitoring and controlling imaging in immersion lithography systems |
US7061578B2 (en) | 2003-08-11 | 2006-06-13 | Advanced Micro Devices, Inc. | Method and apparatus for monitoring and controlling imaging in immersion lithography systems |
DE102007052704B4 (de) * | 2007-11-06 | 2021-04-01 | Kostal Automobil Elektrik Gmbh & Co. Kg | Optoelektronische Sensoreinrichtung für ein Kraftfahrzeug |
KR20130042637A (ko) * | 2008-02-01 | 2013-04-26 | 레어 라이트, 인크. | 임계 주변 반사 분광법을 위한 방법, 장치 및 키트 |
GB2460305B (en) * | 2008-11-11 | 2010-06-16 | Univ Montfort | Determining the particle size distribution of a suspension |
AU2010234465B2 (en) | 2009-04-07 | 2013-11-07 | Rare Light, Inc. | Peri-critical reflection spectroscopy devices, systems, and methods |
US8970838B2 (en) | 2011-04-29 | 2015-03-03 | Avolonte Health LLC | Method and apparatus for evaluating a sample through variable angle Raman spectroscopy |
CN102621098A (zh) * | 2012-03-22 | 2012-08-01 | 上海仪电物理光学仪器有限公司 | 一种数字阿贝折射仪 |
US8692985B1 (en) * | 2012-11-19 | 2014-04-08 | J.A. Woollam Co., Inc. | Method of determining refractive index of prism shaped material |
FI127243B (fi) | 2014-05-13 | 2018-02-15 | Janesko Oy | Menetelmä ja mittalaite Abben luvun jatkuvaksi mittaamiseksi |
US9869227B2 (en) | 2015-05-26 | 2018-01-16 | Intellectual Reserves, LLC | System and method for repeatable fluid measurements |
RU2644439C2 (ru) * | 2015-12-22 | 2018-02-12 | Акционерное общество "Швабе - Технологическая лаборатория" | Способ и устройство контроля качества продукта |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2536537A1 (fr) * | 1982-11-22 | 1984-05-25 | Alexandre Laugier | Procede et refractometre pour mesurer l'indice de refraction d'un liquide et application a la mesure du titre alcoometrique en puissance d'un mout |
US4699511A (en) * | 1985-04-03 | 1987-10-13 | Seaver George A | Refraction sensor |
GB9200562D0 (en) * | 1992-01-11 | 1992-03-11 | Fisons Plc | Analytical device with polychromatic light source |
US5822073A (en) * | 1995-10-25 | 1998-10-13 | University Of Washington | Optical lightpipe sensor based on surface plasmon resonance |
JP3544323B2 (ja) * | 1998-08-31 | 2004-07-21 | セントラル硝子株式会社 | 透明板の表面粗さ検査方法および装置 |
US6738141B1 (en) * | 1999-02-01 | 2004-05-18 | Vir A/S | Surface plasmon resonance sensor |
-
2000
- 2000-05-19 DE DE10025789A patent/DE10025789A1/de not_active Withdrawn
-
2001
- 2001-05-18 WO PCT/DE2001/001992 patent/WO2001088506A1/de active Application Filing
- 2001-05-18 EP EP01943151A patent/EP1285254A1/de not_active Withdrawn
- 2001-05-18 US US10/276,651 patent/US6876444B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0188506A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2001088506A1 (de) | 2001-11-22 |
US6876444B2 (en) | 2005-04-05 |
US20030156278A1 (en) | 2003-08-21 |
DE10025789A1 (de) | 2001-11-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20021115 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH CY DE FR GB IT LI |
|
17Q | First examination report despatched |
Effective date: 20061012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20081202 |