JPS5232327A - Slope control circuit of photographic printer - Google Patents

Slope control circuit of photographic printer

Info

Publication number
JPS5232327A
JPS5232327A JP10764275A JP10764275A JPS5232327A JP S5232327 A JPS5232327 A JP S5232327A JP 10764275 A JP10764275 A JP 10764275A JP 10764275 A JP10764275 A JP 10764275A JP S5232327 A JPS5232327 A JP S5232327A
Authority
JP
Japan
Prior art keywords
slope control
control circuit
photographic printer
diodes
reverse direction
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
JP10764275A
Other languages
Japanese (ja)
Inventor
Hidekazu Asai
Shigeyoshi Fujita
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP10764275A priority Critical patent/JPS5232327A/en
Publication of JPS5232327A publication Critical patent/JPS5232327A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Exposure In Printing And Copying (AREA)

Abstract

PURPOSE: To provide symmetric circuits reversely operating using operational amplifiers and diodes, enable slope control in a forward or reverse direction, and perform decision of the exposure time of a negative image in a substantially negligible short time.
COPYRIGHT: (C)1977,JPO&Japio
JP10764275A 1975-09-05 1975-09-05 Slope control circuit of photographic printer Pending JPS5232327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10764275A JPS5232327A (en) 1975-09-05 1975-09-05 Slope control circuit of photographic printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10764275A JPS5232327A (en) 1975-09-05 1975-09-05 Slope control circuit of photographic printer

Publications (1)

Publication Number Publication Date
JPS5232327A true JPS5232327A (en) 1977-03-11

Family

ID=14464358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10764275A Pending JPS5232327A (en) 1975-09-05 1975-09-05 Slope control circuit of photographic printer

Country Status (1)

Country Link
JP (1) JPS5232327A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176160A (en) * 1971-06-23 1979-11-27 Societe De Prayon Process for purifying a zinc sulfate solution
JPS5756836A (en) * 1980-09-22 1982-04-05 Dainippon Screen Mfg Co Ltd Method and device for correcting anti-reciprocity law in case of color reproduction
JPS5789748A (en) * 1980-11-25 1982-06-04 Dainippon Screen Mfg Co Ltd Exposure time controlling method of picture copying device
JPS5986037A (en) * 1982-11-08 1984-05-18 Fuji Photo Film Co Ltd Controller for amount of exposure for photographic printing
JPS60249138A (en) * 1984-05-25 1985-12-09 Fuji Photo Film Co Ltd Color printer system
JPS60257441A (en) * 1984-06-04 1985-12-19 Fuji Photo Film Co Ltd Printer system
JPS63274824A (en) * 1987-05-06 1988-11-11 Minoru Morita Density measuring instrument for photography

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176160A (en) * 1971-06-23 1979-11-27 Societe De Prayon Process for purifying a zinc sulfate solution
JPS5756836A (en) * 1980-09-22 1982-04-05 Dainippon Screen Mfg Co Ltd Method and device for correcting anti-reciprocity law in case of color reproduction
JPS5789748A (en) * 1980-11-25 1982-06-04 Dainippon Screen Mfg Co Ltd Exposure time controlling method of picture copying device
JPS5986037A (en) * 1982-11-08 1984-05-18 Fuji Photo Film Co Ltd Controller for amount of exposure for photographic printing
JPS60249138A (en) * 1984-05-25 1985-12-09 Fuji Photo Film Co Ltd Color printer system
JPH0554096B2 (en) * 1984-05-25 1993-08-11 Fuji Photo Film Co Ltd
JPS60257441A (en) * 1984-06-04 1985-12-19 Fuji Photo Film Co Ltd Printer system
JPH0561626B2 (en) * 1984-06-04 1993-09-06 Fuji Photo Film Co Ltd
JPS63274824A (en) * 1987-05-06 1988-11-11 Minoru Morita Density measuring instrument for photography

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