FR907856A - Philatelic colorimeter - Google Patents

Philatelic colorimeter

Info

Publication number
FR907856A
FR907856A FR907856DA FR907856A FR 907856 A FR907856 A FR 907856A FR 907856D A FR907856D A FR 907856DA FR 907856 A FR907856 A FR 907856A
Authority
FR
France
Prior art keywords
philatelic
colorimeter
philatelic colorimeter
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
Georges Demoussy
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 FR907856A publication Critical patent/FR907856A/en
Expired legal-status Critical Current

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
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
FR907856D 1944-05-23 1944-05-23 Philatelic colorimeter Expired FR907856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR907856T 1944-05-23

Publications (1)

Publication Number Publication Date
FR907856A true FR907856A (en) 1946-03-25

Family

ID=9406635

Family Applications (1)

Application Number Title Priority Date Filing Date
FR907856D Expired FR907856A (en) 1944-05-23 1944-05-23 Philatelic colorimeter

Country Status (2)

Country Link
FR (1) FR907856A (en)
GB (1) GB617172A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8523071D0 (en) * 1985-09-18 1985-10-23 Crutch S A Detector/indicator of visible information

Also Published As

Publication number Publication date
GB617172A (en) 1949-02-02

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