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FR894581A - Electric light changing colorimeter with automatic equalization - Google Patents

Electric light changing colorimeter with automatic equalization

Info

Publication number
FR894581A
FR894581A FR894581DA FR894581A FR 894581 A FR894581 A FR 894581A FR 894581D A FR894581D A FR 894581DA FR 894581 A FR894581 A FR 894581A
Authority
FR
France
Prior art keywords
colorimeter
electric light
automatic equalization
light changing
changing
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
French (fr)
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.)
Joens & Co W H
Original Assignee
Joens & Co W H
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 Joens & Co W H filed Critical Joens & Co W H
Application granted granted Critical
Publication of FR894581A publication Critical patent/FR894581A/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
    • G01J1/20—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)
FR894581D 1942-05-13 1943-05-11 Electric light changing colorimeter with automatic equalization Expired FR894581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE894581X 1942-05-13

Publications (1)

Publication Number Publication Date
FR894581A true FR894581A (en) 1944-12-28

Family

ID=6847237

Family Applications (1)

Application Number Title Priority Date Filing Date
FR894581D Expired FR894581A (en) 1942-05-13 1943-05-11 Electric light changing colorimeter with automatic equalization

Country Status (1)

Country Link
FR (1) FR894581A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593996A (en) * 1948-12-23 1952-04-22 Interchem Corp Optical density comparator
US3039298A (en) * 1957-09-17 1962-06-19 Budd Co Comparison system for photoelastic measurements
DE1202028B (en) * 1956-08-30 1965-09-30 Libbey Owens Ford Glass Co Device for measuring the tension in glass panes
US3416865A (en) * 1964-11-27 1968-12-17 Xerox Corp Optical density measuring system
US3467475A (en) * 1963-11-06 1969-09-16 Gretag Ag Densitometer incorporating selectively and individually controlled color filters
FR2456948A1 (en) * 1979-05-14 1980-12-12 American Optical Corp APPARATUS FOR AUTOMATIC DOSING OF BLOOD BILIRUBIN CONCENTRATION

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593996A (en) * 1948-12-23 1952-04-22 Interchem Corp Optical density comparator
DE1202028B (en) * 1956-08-30 1965-09-30 Libbey Owens Ford Glass Co Device for measuring the tension in glass panes
US3039298A (en) * 1957-09-17 1962-06-19 Budd Co Comparison system for photoelastic measurements
US3467475A (en) * 1963-11-06 1969-09-16 Gretag Ag Densitometer incorporating selectively and individually controlled color filters
US3416865A (en) * 1964-11-27 1968-12-17 Xerox Corp Optical density measuring system
FR2456948A1 (en) * 1979-05-14 1980-12-12 American Optical Corp APPARATUS FOR AUTOMATIC DOSING OF BLOOD BILIRUBIN CONCENTRATION

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