JPS494687U - - Google Patents

Info

Publication number
JPS494687U
JPS494687U JP1972044152U JP4415272U JPS494687U JP S494687 U JPS494687 U JP S494687U JP 1972044152 U JP1972044152 U JP 1972044152U JP 4415272 U JP4415272 U JP 4415272U JP S494687 U JPS494687 U JP S494687U
Authority
JP
Japan
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
JP1972044152U
Other languages
Japanese (ja)
Other versions
JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
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 filed Critical
Priority to JP1972044152U priority Critical patent/JPS5442704Y2/ja
Priority to US00347693A priority patent/US3829865A/en
Priority to FR7313383A priority patent/FR2180064B3/fr
Priority to DE19732318810 priority patent/DE2318810C3/de
Priority to GB1815073A priority patent/GB1422475A/en
Publication of JPS494687U publication Critical patent/JPS494687U/ja
Application granted granted Critical
Publication of JPS5442704Y2 publication Critical patent/JPS5442704Y2/ja
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
    • 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
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/18—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors using comparison with a reference electric value

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Exposure Control For Cameras (AREA)
JP1972044152U 1972-04-14 1972-04-14 Expired JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1972044152U JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-04-14 1972-04-14
US00347693A US3829865A (en) 1972-04-14 1973-04-04 Electric exposure meter with operational function
FR7313383A FR2180064B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-04-14 1973-04-13
DE19732318810 DE2318810C3 (de) 1972-04-14 1973-04-13 Schaltungsanordnung zur Messung und Anzeige fotographischer Belichtungsgrößen
GB1815073A GB1422475A (en) 1972-04-14 1973-04-16 Electric exposure meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972044152U JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-04-14 1972-04-14

Publications (2)

Publication Number Publication Date
JPS494687U true JPS494687U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-01-16
JPS5442704Y2 JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-12-11

Family

ID=12683643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1972044152U Expired JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-04-14 1972-04-14

Country Status (4)

Country Link
US (1) US3829865A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2180064B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1422475A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5434552B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-06-18 1979-10-27
US4973833A (en) * 1988-09-28 1990-11-27 Minolta Camera Kabushiki Kaisha Image sensor including logarithmic converters
WO2005022194A2 (en) * 2003-08-13 2005-03-10 Lettvin Jonathan D Imaging system
US7952626B2 (en) * 2003-11-17 2011-05-31 Lettvin Jonathan D Geometric remapping with delay lines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528350A (en) * 1966-08-24 1970-09-15 Gossen & Co Gmbh P Photoresistor circuit for light measuring arrangements
SE354128B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1969-02-26 1973-02-26 Nippon Kogaku Kk

Also Published As

Publication number Publication date
US3829865A (en) 1974-08-13
GB1422475A (en) 1976-01-28
DE2318810B2 (de) 1977-03-31
JPS5442704Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-12-11
FR2180064A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-11-23
FR2180064B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-10-24
DE2318810A1 (de) 1973-10-25

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