FR554635A - Method and apparatus for heterochromic photometric measurements - Google Patents

Method and apparatus for heterochromic photometric measurements

Info

Publication number
FR554635A
FR554635A FR554635DA FR554635A FR 554635 A FR554635 A FR 554635A FR 554635D A FR554635D A FR 554635DA FR 554635 A FR554635 A FR 554635A
Authority
FR
France
Prior art keywords
heterochromic
photometric measurements
photometric
measurements
heterochromic photometric
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)
Inventor
Marie-Louis-Amedee Jobin
Gustave-Georges-Jose Yvon
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 filed Critical
Application granted granted Critical
Publication of FR554635A publication Critical patent/FR554635A/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
    • G01J1/34—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 separate light paths used alternately or sequentially, e.g. flicker

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR554635D 1922-08-01 1922-08-01 Method and apparatus for heterochromic photometric measurements Expired FR554635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR554635T 1922-08-01

Publications (1)

Publication Number Publication Date
FR554635A true FR554635A (en) 1923-06-14

Family

ID=8938943

Family Applications (1)

Application Number Title Priority Date Filing Date
FR554635D Expired FR554635A (en) 1922-08-01 1922-08-01 Method and apparatus for heterochromic photometric measurements

Country Status (1)

Country Link
FR (1) FR554635A (en)

Similar Documents

Publication Publication Date Title
FR586144A (en) Method and apparatus for measuring distances and time intervals
FR694014A (en) Apparatus and method for forming crystals
FR554635A (en) Method and apparatus for heterochromic photometric measurements
FR585589A (en) Method and apparatus for measuring distances
FR556398A (en) Method and apparatus for the artificial reconstitution of daylight
FR541253A (en) Method and apparatus for testing materials
FR26547E (en) Method and apparatus for testing materials
FR612603A (en) Method and apparatus for construction of canals
FR707358A (en) Method and apparatus for testing flours
FR628815A (en) Confectionery and method and apparatus for making it
FR696613A (en) Method and apparatus for measuring eye position defects
FR560716A (en) Method and apparatus for measuring distances
FR622419A (en) Method and apparatus for making lemonade
FR541652A (en) Process for measuring vanillin and making it easily soluble
FR567401A (en) Method and apparatus for zinc penetrant testing
FR565693A (en) Method and apparatus for improving the determination of the direction of electromagnetic waves
FR640903A (en) Method and device for determining the composition of brass
FR555173A (en) Method and apparatus for burning sulfur
FR550983A (en) Method and apparatus for drying materials
FR551396A (en) Method and apparatus for concentration of solutions
FR589035A (en) Projection method and apparatus
FR611111A (en) Method and device for measuring x-radiation
FR551163A (en) Filtration method and apparatus
FR586183A (en) Method and apparatus for causing temperature decreases
FR27252E (en) Method and device for measuring large electrical resistances