CH579268A5 - - Google Patents

Info

Publication number
CH579268A5
CH579268A5 CH585173A CH585173A CH579268A5 CH 579268 A5 CH579268 A5 CH 579268A5 CH 585173 A CH585173 A CH 585173A CH 585173 A CH585173 A CH 585173A CH 579268 A5 CH579268 A5 CH 579268A5
Authority
CH
Switzerland
Application number
CH585173A
Original Assignee
Labtronic Ag
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
Priority claimed from DE19722220231 external-priority patent/DE2220231A1/de
Priority claimed from DE19722220230 external-priority patent/DE2220230C3/de
Application filed by Labtronic Ag filed Critical Labtronic Ag
Publication of CH579268A5 publication Critical patent/CH579268A5/xx

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
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • 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
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
CH585173A 1972-04-25 1973-04-19 CH579268A5 (xx)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722220231 DE2220231A1 (de) 1972-04-25 1972-04-25 Photometer zur digitalen anzeige der lichtabsorption einer messprobe in einer kuevette
DE19722220230 DE2220230C3 (de) 1972-04-25 1972-04-25 Schaltung zum automatischen Nullabgleich für ein Phonometer zur digitalen Anzeige der Lichtabsorption einer Messprobe

Publications (1)

Publication Number Publication Date
CH579268A5 true CH579268A5 (xx) 1976-08-31

Family

ID=25763151

Family Applications (1)

Application Number Title Priority Date Filing Date
CH585173A CH579268A5 (xx) 1972-04-25 1973-04-19

Country Status (4)

Country Link
US (1) US3879135A (xx)
JP (1) JPS5054395A (xx)
CH (1) CH579268A5 (xx)
NL (1) NL7305239A (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1518134A (en) * 1974-10-10 1978-07-19 Licentia Gmbh Method for determining the standard visual range
US3989382A (en) * 1975-01-22 1976-11-02 Bio-Data Corporation Platelet aggregation monitoring device
US3992098A (en) * 1975-07-02 1976-11-16 Itek Corporation System for digitally controlling exposure time of camera
JPS56500808A (xx) * 1980-03-17 1981-06-18
IT1154124B (it) * 1980-08-22 1987-01-21 Durst Spa Fabbrica Macchine Ed Procedimento e dispositivo di misura della luce
JPS5848832A (ja) * 1981-09-17 1983-03-22 Horiba Ltd 分析計の補償回路
JPS6175203A (ja) * 1984-09-20 1986-04-17 Oak Seisakusho:Kk 膜厚測定装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722156A (en) * 1952-06-20 1955-11-01 Charles W Warren Differential system for comparing radiant beams
US2804549A (en) * 1953-09-22 1957-08-27 Perkin Elmer Corp Spectrophotometer compensation control
US3416865A (en) * 1964-11-27 1968-12-17 Xerox Corp Optical density measuring system
JPS4848385A (xx) * 1971-10-25 1973-07-09

Also Published As

Publication number Publication date
NL7305239A (xx) 1973-10-29
US3879135A (en) 1975-04-22
JPS5054395A (xx) 1975-05-14

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Legal Events

Date Code Title Description
PL Patent ceased