JPS55114919A - Multi-photometry unit - Google Patents

Multi-photometry unit

Info

Publication number
JPS55114919A
JPS55114919A JP2302179A JP2302179A JPS55114919A JP S55114919 A JPS55114919 A JP S55114919A JP 2302179 A JP2302179 A JP 2302179A JP 2302179 A JP2302179 A JP 2302179A JP S55114919 A JPS55114919 A JP S55114919A
Authority
JP
Japan
Prior art keywords
output
satisfies
pmean
basis
outputs
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.)
Granted
Application number
JP2302179A
Other languages
Japanese (ja)
Other versions
JPS6239366B2 (en
Inventor
Toru Fukuhara
Takashi Saegusa
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku 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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP2302179A priority Critical patent/JPS55114919A/en
Priority to FR8004477A priority patent/FR2462692A1/en
Priority to DE3007575A priority patent/DE3007575C2/en
Priority to GB8006723A priority patent/GB2047415B/en
Publication of JPS55114919A publication Critical patent/JPS55114919A/en
Priority to US06/391,864 priority patent/US4476383A/en
Publication of JPS6239366B2 publication Critical patent/JPS6239366B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors

Abstract

PURPOSE:To make it possible to obtain a correct photometric output even for a photographed field on the high-contrast screen, by analyzing conditions of the photographed field on a basis of photoelectric outputs. CONSTITUTION:A photographed field is divided into plural regions and is subjected to photometry, and plural corresponding photoelectric outputs are generated by 10 to generate output PH which satisfies Pmax>PH>Pmean, output PM which satisfies PM Pmean, output PL which satisfies Pmean>PL>Pmin, output PHM which satisfies PHM=(PH+PM)/2, and output PLM which satisfies PLM=(PM+ PL)/2 in respect to the maximum value, the average value, and the minimum value of photoelectric outputs in correct photometric output generation circuits 11- 16. Photoelectric outputs are normalized in 17 on a basis of the average value, and decisions 18 and 19 are performed for (Pmax-Pmin)<=gamma (gamma is a constant), and the processing of operation extraction 20 is performed on a basis of respective photometric outputs under prescribed conditions.
JP2302179A 1979-02-28 1979-02-28 Multi-photometry unit Granted JPS55114919A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2302179A JPS55114919A (en) 1979-02-28 1979-02-28 Multi-photometry unit
FR8004477A FR2462692A1 (en) 1979-02-28 1980-02-28 DEVICE FOR MULTIPLE MEASUREMENT OF THE OBJECT FIELD OF A VIEWING APPARATUS
DE3007575A DE3007575C2 (en) 1979-02-28 1980-02-28 Calculator for an optimal exposure value
GB8006723A GB2047415B (en) 1979-02-28 1980-02-28 Photometric multi-metering device
US06/391,864 US4476383A (en) 1979-02-28 1982-06-24 Photometering device for obtaining exposure information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2302179A JPS55114919A (en) 1979-02-28 1979-02-28 Multi-photometry unit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP19217186A Division JPS6296827A (en) 1986-08-19 1986-08-19 Multiplex light measuring apparatus

Publications (2)

Publication Number Publication Date
JPS55114919A true JPS55114919A (en) 1980-09-04
JPS6239366B2 JPS6239366B2 (en) 1987-08-22

Family

ID=12098823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2302179A Granted JPS55114919A (en) 1979-02-28 1979-02-28 Multi-photometry unit

Country Status (1)

Country Link
JP (1) JPS55114919A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155820A (en) * 1980-05-02 1981-12-02 Fuji Photo Film Co Ltd Photometric arithmetic system
US5017957A (en) * 1985-09-09 1991-05-21 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5311244A (en) * 1985-09-09 1994-05-10 Minolta Camera Kabushiki Kaisha Exposure control device for a camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56155820A (en) * 1980-05-02 1981-12-02 Fuji Photo Film Co Ltd Photometric arithmetic system
JPH027010B2 (en) * 1980-05-02 1990-02-15 Fuji Photo Film Co Ltd
US5017957A (en) * 1985-09-09 1991-05-21 Minolta Camera Kabushiki Kaisha Exposure control device for a camera
US5311244A (en) * 1985-09-09 1994-05-10 Minolta Camera Kabushiki Kaisha Exposure control device for a camera

Also Published As

Publication number Publication date
JPS6239366B2 (en) 1987-08-22

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