NL245569A - - Google Patents

Info

Publication number
NL245569A
NL245569A NL245569A NL245569A NL245569A NL 245569 A NL245569 A NL 245569A NL 245569 A NL245569 A NL 245569A NL 245569 A NL245569 A NL 245569A NL 245569 A NL245569 A NL 245569A
Authority
NL
Netherlands
Application number
NL245569A
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
Publication of NL245569A publication Critical patent/NL245569A/xx

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
    • 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
    • G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/26—Measuring radiation intensity with resistance detectors
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor
    • G06G7/24—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for evaluating logarithmic or exponential functions, e.g. hyperbolic functions
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0041—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using thermistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0047—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using photo-electric elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/004—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using continuously variable impedance devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Multimedia (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
NL245569A 1958-12-04 1959-11-19 NL245569A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77815558A 1958-12-04 1958-12-04
US836494A US3179808A (en) 1958-12-04 1959-08-27 Photosensitive transducer having predetermined output response

Publications (1)

Publication Number Publication Date
NL245569A true NL245569A (fr) 1964-02-10

Family

ID=41510723

Family Applications (1)

Application Number Title Priority Date Filing Date
NL245569A NL245569A (fr) 1958-12-04 1959-11-19

Country Status (8)

Country Link
US (1) US3179808A (fr)
BE (1) BE585153A (fr)
CH (1) CH364636A (fr)
DE (1) DE1287323B (fr)
FR (1) FR1241490A (fr)
GB (1) GB911311A (fr)
NL (1) NL245569A (fr)
SE (1) SE301348B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281602A (en) * 1963-09-20 1966-10-25 Honeywell Inc Turbidimeter using photoelectric linearizing circuit
US3521962A (en) * 1964-06-19 1970-07-28 Stanley Electric Co Ltd Light responsive and measuring device
US3515045A (en) * 1966-03-24 1970-06-02 Asahi Optical Co Ltd Camera coupled light measuring system
US3693518A (en) * 1968-01-02 1972-09-26 Nippon Kogaku Kk Memory circuit of an electric shutter
US5216248A (en) * 1990-11-08 1993-06-01 Asahi Kogaku Kogyo Kabushiki Kaisha Photodetector with mask for stable output signal
JPH0635027A (ja) * 1992-07-22 1994-02-10 Nikon Corp カメラの自動露出装置及びカメラの測光装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032633A (en) * 1931-09-12 1936-03-03 Riszdorfer Odon Diaphragm for photographic cameras
US2188820A (en) * 1935-07-11 1940-01-30 Rissdorfer Odon Photographic camera
US2226602A (en) * 1937-01-18 1940-12-31 Gen Aniline & Film Corp Automatic setting device for shutters and diaphragms of photographic apparatus
US2186613A (en) * 1937-12-22 1940-01-09 Eastman Kodak Co Photographic camera
US2261532A (en) * 1938-11-08 1941-11-04 Tonnies Hans Ferdinand Photographic apparatus
US2524303A (en) * 1940-03-07 1950-10-03 Bonet-Maury Paul Photometer
DE750797C (de) * 1942-08-11 1945-01-29 Photo- oder kinematographisches Aufnahmegeraet mit vorzugsweise selbsttaetiger Einregelung von Kameraeinstellorganen durch einen photoelektrischen Belichtungsmesser
US2438825A (en) * 1945-06-16 1948-03-30 Trans Lux Corp Selector
US2482980A (en) * 1946-04-06 1949-09-27 Heinz E Kallmann Constant voltage source
US2766654A (en) * 1947-09-30 1956-10-16 Gen Electric Exposure meter with incident light attachment
US2586746A (en) * 1949-08-31 1952-02-19 Interchem Corp Photometric device
US2593616A (en) * 1949-12-16 1952-04-22 Rca Corp Electronic spectroscope
US2654845A (en) * 1952-11-07 1953-10-06 Cecil S Presenz Vapor detector
US2917969A (en) * 1954-03-18 1959-12-22 Kean W Stimm Light meter
US2742550A (en) * 1954-04-19 1956-04-17 Jr James R Jenness Dual photoconductive infrared detector
US2939361A (en) * 1955-05-20 1960-06-07 Leitz Ernst Gmbh Photometric apparatus compensated for fluctuations in light source intensity
JPS404557Y1 (fr) * 1959-11-02 1965-02-09

Also Published As

Publication number Publication date
CH364636A (fr) 1962-09-30
DE1287323B (de) 1969-01-16
BE585153A (fr) 1960-05-30
FR1241490A (fr) 1960-09-16
GB911311A (en) 1962-11-21
US3179808A (en) 1965-04-20
SE301348B (fr) 1968-06-04

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