FR731288A - Camera for measuring the opacity of photographic negatives - Google Patents

Camera for measuring the opacity of photographic negatives

Info

Publication number
FR731288A
FR731288A FR731288DA FR731288A FR 731288 A FR731288 A FR 731288A FR 731288D A FR731288D A FR 731288DA FR 731288 A FR731288 A FR 731288A
Authority
FR
France
Prior art keywords
opacity
camera
measuring
photographic negatives
negatives
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
Rene Lamare
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 FR731288A publication Critical patent/FR731288A/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

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)
FR731288D 1932-02-11 1932-02-11 Camera for measuring the opacity of photographic negatives Expired FR731288A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731288T 1932-02-11

Publications (1)

Publication Number Publication Date
FR731288A true FR731288A (en) 1932-08-31

Family

ID=9117707

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731288D Expired FR731288A (en) 1932-02-11 1932-02-11 Camera for measuring the opacity of photographic negatives

Country Status (1)

Country Link
FR (1) FR731288A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480207A2 (en) * 1990-10-11 1992-04-15 Dentsply Venture Capital Associates L.P. Test system viewer for fluorescence evaluation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480207A2 (en) * 1990-10-11 1992-04-15 Dentsply Venture Capital Associates L.P. Test system viewer for fluorescence evaluation
EP0480207A3 (en) * 1990-10-11 1992-12-30 Dentsply Venture Capital Associates L.P. Test system viewer for fluorescence evaluation

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