JPS5468632A - Counter for photographic print exposure time - Google Patents

Counter for photographic print exposure time

Info

Publication number
JPS5468632A
JPS5468632A JP13530877A JP13530877A JPS5468632A JP S5468632 A JPS5468632 A JP S5468632A JP 13530877 A JP13530877 A JP 13530877A JP 13530877 A JP13530877 A JP 13530877A JP S5468632 A JPS5468632 A JP S5468632A
Authority
JP
Japan
Prior art keywords
exposure time
counter
color
light
colors
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
JP13530877A
Other languages
Japanese (ja)
Inventor
Taizo Akimoto
Kimiharu Takahashi
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 JP13530877A priority Critical patent/JPS5468632A/en
Publication of JPS5468632A publication Critical patent/JPS5468632A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Exposure In Printing And Copying (AREA)

Abstract

PURPOSE: To simply and assuredly determine the print exposure time by deriving the light of a colored image with an optical fiber, measuring the densities of blue, green, and red colors, and counting an exposure time of each color.
CONSTITUTION: The light of transmitted image of film 12 which transmits an optical fiber 15 pressed to negative film 12 is separated by required dichroic mirrors 22, 23 into three colors. The light of these separated colors is detected by blue, green, and red color lights detectors 24W26, and the image density signal of each color of the film 12 is added to counter 29 via multiplexer 27 and logarithm conversion amplifier 28. Hence the counter 29 counts the exposure time in accordance with the density and each color of the function relation and determines. Accordingly, the proper exposure time for print can be counted simply and assuredly without recourse to test printing.
COPYRIGHT: (C)1979,JPO&Japio
JP13530877A 1977-11-11 1977-11-11 Counter for photographic print exposure time Pending JPS5468632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13530877A JPS5468632A (en) 1977-11-11 1977-11-11 Counter for photographic print exposure time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13530877A JPS5468632A (en) 1977-11-11 1977-11-11 Counter for photographic print exposure time

Publications (1)

Publication Number Publication Date
JPS5468632A true JPS5468632A (en) 1979-06-01

Family

ID=15148677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13530877A Pending JPS5468632A (en) 1977-11-11 1977-11-11 Counter for photographic print exposure time

Country Status (1)

Country Link
JP (1) JPS5468632A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132361A (en) * 1980-03-21 1981-10-16 Ricoh Co Ltd Exposure stabilizing device
JPS60181739A (en) * 1984-02-28 1985-09-17 Fuji Photo Film Co Ltd Determining method of radiation image information read condition and/or image processing condition
US5719540A (en) * 1994-05-02 1998-02-17 Fuji Photo Film Co., Ltd. Method of determining the proper amount of exposure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132361A (en) * 1980-03-21 1981-10-16 Ricoh Co Ltd Exposure stabilizing device
JPS60181739A (en) * 1984-02-28 1985-09-17 Fuji Photo Film Co Ltd Determining method of radiation image information read condition and/or image processing condition
US5719540A (en) * 1994-05-02 1998-02-17 Fuji Photo Film Co., Ltd. Method of determining the proper amount of exposure

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