JPS5713440A - Photographic copying device for exposed film - Google Patents

Photographic copying device for exposed film

Info

Publication number
JPS5713440A
JPS5713440A JP8760580A JP8760580A JPS5713440A JP S5713440 A JPS5713440 A JP S5713440A JP 8760580 A JP8760580 A JP 8760580A JP 8760580 A JP8760580 A JP 8760580A JP S5713440 A JPS5713440 A JP S5713440A
Authority
JP
Japan
Prior art keywords
film
photography
light
blackening
degree
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.)
Pending
Application number
JP8760580A
Other languages
Japanese (ja)
Inventor
Takashi Oikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OSUKON DENSHI KK
Original Assignee
OSUKON DENSHI KK
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 by OSUKON DENSHI KK filed Critical OSUKON DENSHI KK
Priority to JP8760580A priority Critical patent/JPS5713440A/en
Publication of JPS5713440A publication Critical patent/JPS5713440A/en
Pending 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)
  • Projection-Type Copiers In General (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Of Exposure In Printing And Copying (AREA)

Abstract

PURPOSE:To obtain an excellent copied film well balanced in blackening degree by regulating the quantity of light by using a cathode-ray tube as a back light for copying photography and by making a partial adjustment of luminance at a prescribed level which corresponds to the brightness and darkness of an exposed film. CONSTITUTION:To a scanner 2, a processing circuit 6 for picture signals is connected, and this circuit measures the degree of light and darkness on the basis of data from the scanner 2 when the quantity of light from a back light is constant. An optional picture signal which corresponds to the partial density of a film after photography is supplied to the control circuit 7 of a CRT8 with a constant matching with a tested photograhic film and the film after photography. This constitution makes adjustments of luminance of respective parts on the CRT screen, on the basis of data obtained by detecting the blackening degree of the film after photography, to prescribed levels which correspond to the blackening degrees, so that an excellent well-balanced copied picture is obtained.
JP8760580A 1980-06-27 1980-06-27 Photographic copying device for exposed film Pending JPS5713440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8760580A JPS5713440A (en) 1980-06-27 1980-06-27 Photographic copying device for exposed film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8760580A JPS5713440A (en) 1980-06-27 1980-06-27 Photographic copying device for exposed film

Publications (1)

Publication Number Publication Date
JPS5713440A true JPS5713440A (en) 1982-01-23

Family

ID=13919595

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8760580A Pending JPS5713440A (en) 1980-06-27 1980-06-27 Photographic copying device for exposed film

Country Status (1)

Country Link
JP (1) JPS5713440A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63101838A (en) * 1986-10-17 1988-05-06 Fuji Photo Film Co Ltd Color printer
JPS63316840A (en) * 1987-06-19 1988-12-26 Fuji Photo Film Co Ltd Photographic printing device
JPS6435542A (en) * 1987-07-31 1989-02-06 Fuji Photo Film Co Ltd Photographic printer
JPS6435538A (en) * 1987-07-31 1989-02-06 Fuji Photo Film Co Ltd Shading correction device for photographic printer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63101838A (en) * 1986-10-17 1988-05-06 Fuji Photo Film Co Ltd Color printer
JPS63316840A (en) * 1987-06-19 1988-12-26 Fuji Photo Film Co Ltd Photographic printing device
JPS6435542A (en) * 1987-07-31 1989-02-06 Fuji Photo Film Co Ltd Photographic printer
JPS6435538A (en) * 1987-07-31 1989-02-06 Fuji Photo Film Co Ltd Shading correction device for photographic printer

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