GB1373807A - Method and device for the examination of materials - Google Patents

Method and device for the examination of materials

Info

Publication number
GB1373807A
GB1373807A GB4940471A GB4940471A GB1373807A GB 1373807 A GB1373807 A GB 1373807A GB 4940471 A GB4940471 A GB 4940471A GB 4940471 A GB4940471 A GB 4940471A GB 1373807 A GB1373807 A GB 1373807A
Authority
GB
United Kingdom
Prior art keywords
photo
detectors
radiation
filters
filtered
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.)
Expired
Application number
GB4940471A
Inventor
P M Typpo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DATEX Oy
Original Assignee
DATEX Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DATEX Oy filed Critical DATEX Oy
Publication of GB1373807A publication Critical patent/GB1373807A/en
Expired legal-status Critical Current

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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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

1373807 Photo-electric absorption analysis INSINOORITOIMISTO DATEX OY 25 Oct 1971 [4 Nov 1970] 49404/71 Heading G1A In a method of examining a material in which a radiation beam R that has passed through or been back-scattered from the material is divided and at least some of the resulting beams are filtered, one of the filtered beams, e.g. Rb, contains a wavelength which interacts with a component of the material whose concentration is to be measured. As shown two components a and b of the material are determined simultaneously. Filters Fa, Fb remove the wavelengths # a , # b which interact with the components a and b respectively. Hence the respective outputs from photo-cells D1 and D2 are proportional to the concentrations of b and a respectively in the material. Beam RR, from which both # a and # b have been removed, provides a reference output from photo-cell D3. Other filters (F) Fig. 6 (not shown) may be placed in the undivided beam R to exclude unwanted wavelengths. Using infrared radiation from an incandescent lamp source and PbS photo-resistors as detectors, the water content in a paper web may be continuously monitored and the production of the web may be guided and controlled accordingly. Tubes having reflective inner surfaces may be used to conduct radiation from the material to the detectors.
GB4940471A 1970-11-04 1971-10-25 Method and device for the examination of materials Expired GB1373807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI296270A FI44862C (en) 1970-11-04 1970-11-04 Method and apparatus for studying solids and liquids based on their radiation absorption

Publications (1)

Publication Number Publication Date
GB1373807A true GB1373807A (en) 1974-11-13

Family

ID=8507825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4940471A Expired GB1373807A (en) 1970-11-04 1971-10-25 Method and device for the examination of materials

Country Status (7)

Country Link
JP (1) JPS479000A (en)
CA (1) CA964487A (en)
CH (1) CH526102A (en)
FI (1) FI44862C (en)
FR (1) FR2112917A5 (en)
GB (1) GB1373807A (en)
SE (1) SE375855B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4840706A (en) * 1983-09-26 1989-06-20 The Wiggins Teape Group Limited Method and apparatus for measuring water content

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5591891U (en) * 1978-12-21 1980-06-25
WO2009123068A1 (en) * 2008-04-01 2009-10-08 国立大学法人豊橋技術科学大学 Discrimination filtering device, method for discriminating object, and method for designing filter of discriminating filtering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4840706A (en) * 1983-09-26 1989-06-20 The Wiggins Teape Group Limited Method and apparatus for measuring water content

Also Published As

Publication number Publication date
JPS479000A (en) 1972-05-10
DE2128273A1 (en) 1972-05-18
FR2112917A5 (en) 1972-06-23
DE2128273B2 (en) 1975-11-20
CA964487A (en) 1975-03-18
SE375855B (en) 1975-04-28
CH526102A (en) 1972-07-31
FI44862B (en) 1971-09-30
FI44862C (en) 1972-01-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee