FR2026257A1 - - Google Patents

Info

Publication number
FR2026257A1
FR2026257A1 FR6943407A FR6943407A FR2026257A1 FR 2026257 A1 FR2026257 A1 FR 2026257A1 FR 6943407 A FR6943407 A FR 6943407A FR 6943407 A FR6943407 A FR 6943407A FR 2026257 A1 FR2026257 A1 FR 2026257A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6943407A
Other languages
French (fr)
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Publication of FR2026257A1 publication Critical patent/FR2026257A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/347—DC amplifiers in which all stages are DC-coupled with semiconductor devices only in integrated 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
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
    • G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/081—Analogue circuits
    • G03B7/087—Analogue circuits for control of both exposure time and aperture
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/70—Charge amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Exposure Control For Cameras (AREA)
  • Amplifiers (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
FR6943407A 1968-12-16 1969-12-15 Withdrawn FR2026257A1 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78385568A 1968-12-16 1968-12-16

Publications (1)

Publication Number Publication Date
FR2026257A1 true FR2026257A1 (enExample) 1970-09-18

Family

ID=25130608

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6943407A Withdrawn FR2026257A1 (enExample) 1968-12-16 1969-12-15

Country Status (7)

Country Link
US (1) US3620143A (enExample)
JP (1) JPS4915821B1 (enExample)
CA (1) CA928557A (enExample)
DE (1) DE1963085C3 (enExample)
FR (1) FR2026257A1 (enExample)
GB (1) GB1293771A (enExample)
NL (1) NL169232C (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090358A1 (enExample) * 1970-05-28 1972-01-14 Texas Instruments Inc
FR2402221A1 (fr) * 1977-09-02 1979-03-30 Polaroid Corp Appareil de prise de vues photographique comportant un dispositif de lames d'obturateur " a balayage " commande par un electro-aimant

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734632A (en) * 1970-10-31 1973-05-22 Minolta Camera Kk Current compensated detection circuits for photovoltaic cells
US3758796A (en) * 1971-06-10 1973-09-11 Texas Instruments Inc Photosensor control
US3849786A (en) * 1971-12-10 1974-11-19 Minolta Camera Kk Light integrating type light detector circuit with photovoltaic cell
DE2255329C3 (de) * 1972-11-11 1977-11-17 Kodak Ag Photographischer blendenverschluss
US3809992A (en) * 1972-11-13 1974-05-07 Mamiya Camera Circuit for storing a representation of an incident light quantity in a camera
JPS5521326B2 (enExample) * 1972-11-16 1980-06-09
JPS5842415B2 (ja) * 1974-03-08 1983-09-20 ミノルタ株式会社 カメラノロシユツジヨウホウエンザンカイロ
JPS5415736A (en) * 1978-06-14 1979-02-05 Yashica Co Ltd Photocurrent amplifing circuit
JPS5481785U (enExample) * 1978-08-23 1979-06-09
US4241280A (en) * 1979-06-25 1980-12-23 Polaroid Corporation Light integrator circuit with built-in anticipation
US4255030A (en) * 1979-09-13 1981-03-10 Polaroid Corporation Camera with proportional fill flash quench strobe
US4346971A (en) * 1979-10-01 1982-08-31 Polaroid Corporation Photographic apparatus with controlled shutter blade time out
US4290683A (en) * 1980-09-22 1981-09-22 Polaroid Corporation Sonar responsive shutter blade time out control circuit
US4293208A (en) * 1980-10-20 1981-10-06 Polaroid Corporation Prebias for digital light integrator
US4306786A (en) * 1980-12-19 1981-12-22 Polaroid Corporation Photographic exposure control with scene light integration level determined as function of pre-exposure ambient scene light detect
US4355873A (en) * 1981-06-08 1982-10-26 Polaroid Corporation Photographic control system for varying both flash fire aperture and exposure termination in correspondence with film speed
US4717935A (en) * 1985-08-09 1988-01-05 Polaroid Corporation Electronic trim control for dual-photodetector exposure control system
US4876566A (en) * 1988-10-17 1989-10-24 Polaroid Corporation Camera having auto-trim exposure control
CN116809802B (zh) * 2023-07-07 2025-11-11 上海欧通电气有限公司 折弯保护方法及相关装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090358A1 (enExample) * 1970-05-28 1972-01-14 Texas Instruments Inc
FR2402221A1 (fr) * 1977-09-02 1979-03-30 Polaroid Corp Appareil de prise de vues photographique comportant un dispositif de lames d'obturateur " a balayage " commande par un electro-aimant

Also Published As

Publication number Publication date
US3620143A (en) 1971-11-16
NL6918855A (enExample) 1970-06-18
GB1293771A (en) 1972-10-25
NL169232B (nl) 1982-01-18
JPS4915821B1 (enExample) 1974-04-17
DE1963085C3 (de) 1979-09-27
DE1963085A1 (de) 1970-07-02
CA928557A (en) 1973-06-19
DE1963085B2 (de) 1979-01-25
NL169232C (nl) 1982-06-16

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Legal Events

Date Code Title Description
ST Notification of lapse