GB1327709A - Densitometer - Google Patents

Densitometer

Info

Publication number
GB1327709A
GB1327709A GB2612971*A GB2612971A GB1327709A GB 1327709 A GB1327709 A GB 1327709A GB 2612971 A GB2612971 A GB 2612971A GB 1327709 A GB1327709 A GB 1327709A
Authority
GB
United Kingdom
Prior art keywords
wedge
disc
photocell
chopper
pulses
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
GB2612971*A
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.)
Novartis AG
Original Assignee
Ciba Geigy 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
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1327709A publication Critical patent/GB1327709A/en
Expired legal-status Critical Current

Links

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
    • 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
    • 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
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
    • G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB2612971*A 1970-04-02 1971-04-19 Densitometer Expired GB1327709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH488670A CH522219A (de) 1970-04-02 1970-04-02 Densitometer

Publications (1)

Publication Number Publication Date
GB1327709A true GB1327709A (en) 1973-08-22

Family

ID=4284253

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2612971*A Expired GB1327709A (en) 1970-04-02 1971-04-19 Densitometer

Country Status (8)

Country Link
US (1) US3711208A (enExample)
BE (1) BE765128A (enExample)
CA (1) CA932550A (enExample)
CH (1) CH522219A (enExample)
DE (1) DE2116035A1 (enExample)
FR (1) FR2089058A5 (enExample)
GB (1) GB1327709A (enExample)
SE (1) SE358236B (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1434304A (en) * 1973-05-16 1976-05-05 Ciba Geigy Ag Optical apparatus
FR2455751A1 (fr) * 1979-05-02 1980-11-28 Thomson Csf Systeme recepteur optoelectrique multispectral a haute dynamique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146904A (en) * 1936-05-07 1939-02-14 Eastman Kodak Co Reflection and transmission densitometer
FR1356426A (fr) * 1963-02-14 1964-03-27 Compteurs Comp D Perfectionnements aux dispositifs de comparaison de flux lumineux
US3528749A (en) * 1966-12-09 1970-09-15 Itek Corp Apparatus for measuring optical density
US3623817A (en) * 1970-02-24 1971-11-30 Ciba Ltd Comparison densitometer including means to maintain the detector output at a means valve
US3600099A (en) * 1970-04-07 1971-08-17 Schoeffel Instrument Corp Thin layer chromatographic apparatus for comparing a sample and a reference

Also Published As

Publication number Publication date
CA932550A (en) 1973-08-28
CH522219A (de) 1972-06-15
US3711208A (en) 1973-01-16
SE358236B (enExample) 1973-07-23
DE2116035A1 (de) 1971-10-14
BE765128A (fr) 1971-10-01
FR2089058A5 (enExample) 1972-01-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee