JPS5689026A - Photometry device - Google Patents

Photometry device

Info

Publication number
JPS5689026A
JPS5689026A JP16668979A JP16668979A JPS5689026A JP S5689026 A JPS5689026 A JP S5689026A JP 16668979 A JP16668979 A JP 16668979A JP 16668979 A JP16668979 A JP 16668979A JP S5689026 A JPS5689026 A JP S5689026A
Authority
JP
Japan
Prior art keywords
diodes
via lead
complicate
photodiodes
lead wire
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
JP16668979A
Other languages
Japanese (ja)
Inventor
Kenji Nakauchi
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 JP16668979A priority Critical patent/JPS5689026A/en
Publication of JPS5689026A publication Critical patent/JPS5689026A/en
Pending legal-status Critical Current

Links

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE: To obtain a complicate zone pattern easily, by connecting electrically and dividing variably photodetectors, divided into many photometric areas, into desired zones.
CONSTITUTION: Many photodiodes are connected together via lead wires according to zone divisions; for example, diodes 100, 101 and 108 are connected in parallel via lead wire 11, and diodes 102 and 109 are connected in parallel via lead wire 12. As for photodiodes 100, 101... in the same group, logarithmic conversion and impedance conversion are performed by operational amplifiers 24aW24n and logarithmic diodes 25aW25n. Output signals of those amplifiers are inputted to operational amplifier 15a. Consequently, a zone pattern complicate in shape is easily formed.
COPYRIGHT: (C)1981,JPO&Japio
JP16668979A 1979-12-21 1979-12-21 Photometry device Pending JPS5689026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16668979A JPS5689026A (en) 1979-12-21 1979-12-21 Photometry device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16668979A JPS5689026A (en) 1979-12-21 1979-12-21 Photometry device

Publications (1)

Publication Number Publication Date
JPS5689026A true JPS5689026A (en) 1981-07-20

Family

ID=15835904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16668979A Pending JPS5689026A (en) 1979-12-21 1979-12-21 Photometry device

Country Status (1)

Country Link
JP (1) JPS5689026A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250530A (en) * 1985-04-26 1986-11-07 Mitsubishi Electric Corp Light receiving element for setting white balance
JPS61250529A (en) * 1985-04-26 1986-11-07 Mitsubishi Electric Corp Light receiving element for setting white balance

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123030A (en) * 1978-03-17 1979-09-25 Olympus Optical Co Ltd Photometric device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123030A (en) * 1978-03-17 1979-09-25 Olympus Optical Co Ltd Photometric device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250530A (en) * 1985-04-26 1986-11-07 Mitsubishi Electric Corp Light receiving element for setting white balance
JPS61250529A (en) * 1985-04-26 1986-11-07 Mitsubishi Electric Corp Light receiving element for setting white balance

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