FR1130381A - Photographic process - Google Patents

Photographic process

Info

Publication number
FR1130381A
FR1130381A FR1130381DA FR1130381A FR 1130381 A FR1130381 A FR 1130381A FR 1130381D A FR1130381D A FR 1130381DA FR 1130381 A FR1130381 A FR 1130381A
Authority
FR
France
Prior art keywords
photographic process
photographic
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
Richard N Johnson
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 FR1130381A publication Critical patent/FR1130381A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/725—Optical projection devices wherein the contrast is controlled electrically (e.g. cathode ray tube masking)

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
FR1130381D 1954-09-02 1955-08-29 Photographic process Expired FR1130381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1130381XA 1954-09-02 1954-09-02

Publications (1)

Publication Number Publication Date
FR1130381A true FR1130381A (en) 1957-02-05

Family

ID=22347270

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1130381D Expired FR1130381A (en) 1954-09-02 1955-08-29 Photographic process

Country Status (1)

Country Link
FR (1) FR1130381A (en)

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