JPS57133325A - Autorange photometer - Google Patents

Autorange photometer

Info

Publication number
JPS57133325A
JPS57133325A JP1877481A JP1877481A JPS57133325A JP S57133325 A JPS57133325 A JP S57133325A JP 1877481 A JP1877481 A JP 1877481A JP 1877481 A JP1877481 A JP 1877481A JP S57133325 A JPS57133325 A JP S57133325A
Authority
JP
Japan
Prior art keywords
range
operational amplifier
amplifiers
operational
amplification
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
JP1877481A
Other languages
Japanese (ja)
Other versions
JPS6156446B2 (en
Inventor
Yoshihiro Ono
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1877481A priority Critical patent/JPS57133325A/en
Publication of JPS57133325A publication Critical patent/JPS57133325A/en
Publication of JPS6156446B2 publication Critical patent/JPS6156446B2/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
    • G01J1/44—Electric circuits

Abstract

PURPOSE:To enable to perform a high-precise and steady self-measurement, which is reduced in a zero drift, in a wide range and high-speed photometry though bringing of an amplifying range into a self-switching operation, by alining in parallel two operational amplifiers at an initial stage. CONSTITUTION:A photoelectric conversion element 1 is connected beween current input ends of each of two operation amplifiers 2 and 3 which are constituted to perform a current-voltage conversion. A range decision circuit 4 is conncted to the operational amplifier 3 to install a switch circuit 5 for switching the degree of amplification of the operational amplifier 2 corresponding to the output. If, for example, a photoelectromotive force is generated in the photoelectric conversion element 1, photocurrents, being different in polar phases and equilizing in an absolute value, are inputted to the operational amplifiers 2 and 3. The output of the operational amplifiers 3 produces a range signal by means of a range decision circuit 4 to be outputted to a switch circuit 5 where the degree of amplification of the operational amplifier 2 is switched.
JP1877481A 1981-02-10 1981-02-10 Autorange photometer Granted JPS57133325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1877481A JPS57133325A (en) 1981-02-10 1981-02-10 Autorange photometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1877481A JPS57133325A (en) 1981-02-10 1981-02-10 Autorange photometer

Publications (2)

Publication Number Publication Date
JPS57133325A true JPS57133325A (en) 1982-08-18
JPS6156446B2 JPS6156446B2 (en) 1986-12-02

Family

ID=11980974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1877481A Granted JPS57133325A (en) 1981-02-10 1981-02-10 Autorange photometer

Country Status (1)

Country Link
JP (1) JPS57133325A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366243A2 (en) * 1988-10-26 1990-05-02 Tektronix Inc. Combined optical power meter and receiver
WO1995021371A1 (en) * 1994-02-07 1995-08-10 Itt Automotive Europe Gmbh Circuit arrangement for receiving light signals
WO2011001523A1 (en) * 2009-07-01 2011-01-06 パイオニア株式会社 Light-quantity detecting device, and light-quantity information processing device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366243A2 (en) * 1988-10-26 1990-05-02 Tektronix Inc. Combined optical power meter and receiver
JPH02151736A (en) * 1988-10-26 1990-06-11 Tektronix Inc Light measuring apparatus
JPH0585850B2 (en) * 1988-10-26 1993-12-09 Sony Tektronix Corp
WO1995021371A1 (en) * 1994-02-07 1995-08-10 Itt Automotive Europe Gmbh Circuit arrangement for receiving light signals
US5900960A (en) * 1994-02-07 1999-05-04 Itt Automobive Europe Gmbh Circuit arrangement for receiving light signals
WO2011001523A1 (en) * 2009-07-01 2011-01-06 パイオニア株式会社 Light-quantity detecting device, and light-quantity information processing device
JP5085785B2 (en) * 2009-07-01 2012-11-28 パイオニア株式会社 Light amount detection device and light amount information processing device
US8742314B2 (en) 2009-07-01 2014-06-03 Pioneer Corporation Light amount detecting apparatus, and light amount information processing apparatus

Also Published As

Publication number Publication date
JPS6156446B2 (en) 1986-12-02

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