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

Camera for measuring the opacity of photographic negatives

Info

Publication number: FR731288A
Authority: FR; France
Prior art keywords: opacity; camera; measuring; photographic negatives; negatives
Prior art date: 1932-02-11
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

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.)

1932-02-11

Filing date

1932-02-11

Publication date

1932-08-31

1932-02-11 Application filed filed Critical

1932-08-31 Application granted granted Critical

1932-08-31 Publication of FR731288A publication Critical patent/FR731288A/en

Status Expired legal-status Critical Current

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

1932
- 1932-02-11 FR FR731288D patent/FR731288A/en not_active Expired

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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