FR930726A - Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique - Google Patents

Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique

Info

Publication number
FR930726A
FR930726A FR930726DA FR930726A FR 930726 A FR930726 A FR 930726A FR 930726D A FR930726D A FR 930726DA FR 930726 A FR930726 A FR 930726A
Authority
FR
France
Prior art keywords
electronic circuit
circuit devices
logarithmic sensitivity
logarithmic
sensitivity
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
Other languages
English (en)
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.)
Gen Aniline & Film Co
GAF Chemicals Corp
Original Assignee
Gen Aniline & Film Co
General Aniline and Film Corp
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 Gen Aniline & Film Co, General Aniline and Film Corp filed Critical Gen Aniline & Film Co
Application granted granted Critical
Publication of FR930726A publication Critical patent/FR930726A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/005—Circuits for altering the indicating characteristic, e.g. making it non-linear
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/30—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
FR930726D 1944-12-30 1946-07-17 Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique Expired FR930726A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US570627A US2478163A (en) 1944-12-30 1944-12-30 Logarithmic photometer

Publications (1)

Publication Number Publication Date
FR930726A true FR930726A (fr) 1948-02-03

Family

ID=24280402

Family Applications (1)

Application Number Title Priority Date Filing Date
FR930726D Expired FR930726A (fr) 1944-12-30 1946-07-17 Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique

Country Status (4)

Country Link
US (1) US2478163A (fr)
DE (1) DE876770C (fr)
FR (1) FR930726A (fr)
GB (1) GB624313A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733357A (en) * 1956-01-31 Warren
US2734149A (en) * 1956-02-07 Rabinow
US2582831A (en) * 1946-03-22 1952-01-15 Faximile Inc Logarithmic circuit
US2707238A (en) * 1949-09-13 1955-04-26 Westinghouse Electric Corp Photomultiplier tube circuit
US2699086A (en) * 1950-05-22 1955-01-11 Univ California Means for measuring physical brightness and physical brightness ratios
US2769098A (en) * 1953-04-21 1956-10-30 Stuart B Dunham Wide range radiation instrument
US3006242A (en) * 1958-04-01 1961-10-31 Latronics Corp Optical temperature measuring apparatus
US3625621A (en) * 1969-07-30 1971-12-07 Calbiochem Optical densitometer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE416462A (fr) * 1935-07-11
NL45478C (fr) * 1935-07-26
US2227031A (en) * 1937-02-24 1940-12-31 Loewe Radio Inc Phototube with electron multiplier
US2231697A (en) * 1938-01-29 1941-02-11 Rca Corp Electron multiplier
US2290775A (en) * 1940-05-01 1942-07-21 Rca Corp Stabilization of photoelectric electron multipliers
US2361549A (en) * 1942-05-15 1944-10-31 Speedy Gravure Corp Register indicator
US2407564A (en) * 1944-03-06 1946-09-10 Gen Motors Corp Light meter
US2417023A (en) * 1944-09-15 1947-03-04 Gen Aniline & Film Corp Photoelectric electron multiplier tube photometer circuits

Also Published As

Publication number Publication date
US2478163A (en) 1949-08-02
DE876770C (de) 1953-05-18
GB624313A (en) 1949-06-02

Similar Documents

Publication Publication Date Title
FR55236E (fr) Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique
FR930726A (fr) Perfectionnements aux dispositifs à circuits électroniques à sensibilité logarithmique
FR58156E (fr) Perfectionnements aux circuits de couplage
ES175313A1 (es) Un dispositivo electrónico
FR921659A (fr) Perfectionnements aux circuits amplificateurs
FR970803A (fr) Perfectionnements aux tubes électroniques
FR947152A (fr) Dispositif à décharges électroniques
FR912543A (fr) Dispositif demontage des circuits électriques
FR932279A (fr) Perfectionnements aux dispositifs à décharge électronique
FR930580A (fr) Perfectionnements aux circuits électriques compensateurs
FR925996A (fr) Perfectionnements aux dispositifs synchroniseurs électroniques
FR934919A (fr) Perfectionnements aux dispositifs à décharge électronique
FR933207A (fr) Perfectionnements aux circuits électroniques
FR939272A (fr) Perfectionnements aux dispositifs à décharge électronique
FR906923A (fr) Télescope et lunette élèctroniques
FR906577A (fr) Perfectionnements aux circuits absorbants
FR914813A (fr) Perfectionnement aux commutateurs électroniques
FR912403A (fr) Perfectionnements aux disjoncteurs à ruptures multiples
FR948603A (fr) Perfectionnements aux dispositifs à décharge électronique
FR938752A (fr) Perfectionnements aux dispositifs à décharge électronique
FR939290A (fr) Perfectionnements aux dispositifs à décharge électronique
FR951965A (fr) Perfectionnements aux tubes électroniques
FR938188A (fr) Perfectionnements aux appareils à décharge électronique
FR908575A (fr) Perfectionnements aux commutateurs électroniques
FR945508A (fr) Perfectionnements aux dispositifs sensibles aux variations de densité