JPS5526459A - Sensitivity correction circuit of photoelectric element - Google Patents

Sensitivity correction circuit of photoelectric element

Info

Publication number
JPS5526459A
JPS5526459A JP9951578A JP9951578A JPS5526459A JP S5526459 A JPS5526459 A JP S5526459A JP 9951578 A JP9951578 A JP 9951578A JP 9951578 A JP9951578 A JP 9951578A JP S5526459 A JPS5526459 A JP S5526459A
Authority
JP
Japan
Prior art keywords
voltage
converted
current
analogue
sensitivity
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
JP9951578A
Other languages
Japanese (ja)
Other versions
JPS5945087B2 (en
Inventor
Tetsuzo Tanimoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9951578A priority Critical patent/JPS5945087B2/en
Publication of JPS5526459A publication Critical patent/JPS5526459A/en
Publication of JPS5945087B2 publication Critical patent/JPS5945087B2/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Measurement Of Radiation (AREA)
  • Nuclear Medicine (AREA)

Abstract

PURPOSE:To make it possible to correct automatically a photoelectric element with a high precision in a simple circuit constitution by storing sensitivity differences among plural photoelectric elements as digital signals and converting them to analogue signals and feeding back these analogue signals. CONSTITUTION:Photoelectric elements 1 and 2 which detected detection light 3 having the same light quantity convert detection light 3 to currents I1 and I2 respectively, and these currents are converted to voltages V1 and V2 by voltage- current converter circuits 4 and 5, and difference voltage V3 between them is obtained by voltage differential amplifier 6. This voltage is converted to digital signals and is stored in storage circuit 8 as information of sensitivity error by sensitivity correction start signal 11. This information is converted to analogue voltage V4 and is converted to current I3 by current-voltage converter circuit 10; however, relation I3=I2-I1 is obtained by arranging conditions of respective circuits. Then, when this current is fed back, I1+(I2-I1)=I2 is true, thus correcting lement 1 for element 2.
JP9951578A 1978-08-17 1978-08-17 Photoelectric element sensitivity correction circuit Expired JPS5945087B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9951578A JPS5945087B2 (en) 1978-08-17 1978-08-17 Photoelectric element sensitivity correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9951578A JPS5945087B2 (en) 1978-08-17 1978-08-17 Photoelectric element sensitivity correction circuit

Publications (2)

Publication Number Publication Date
JPS5526459A true JPS5526459A (en) 1980-02-25
JPS5945087B2 JPS5945087B2 (en) 1984-11-02

Family

ID=14249380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9951578A Expired JPS5945087B2 (en) 1978-08-17 1978-08-17 Photoelectric element sensitivity correction circuit

Country Status (1)

Country Link
JP (1) JPS5945087B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759184A (en) * 1980-09-27 1982-04-09 Hitachi Medical Corp Scintilallation camera
JPS5847223A (en) * 1981-09-17 1983-03-18 Ricoh Co Ltd Method and device for correcting sensitivity of solid state sensor
JPS61105477A (en) * 1984-10-29 1986-05-23 Nec Corp Laser light warning device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61170488A (en) * 1985-01-25 1986-08-01 太刀川　紀男 Bobbin thread feed mechanism of sewing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5759184A (en) * 1980-09-27 1982-04-09 Hitachi Medical Corp Scintilallation camera
JPS5847223A (en) * 1981-09-17 1983-03-18 Ricoh Co Ltd Method and device for correcting sensitivity of solid state sensor
JPS61105477A (en) * 1984-10-29 1986-05-23 Nec Corp Laser light warning device

Also Published As

Publication number Publication date
JPS5945087B2 (en) 1984-11-02

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