FR821026A - Device for automatically controlling the diaphragm of a photographic or cinematographic lens as a function of the light intensity of the beam passing through the latter - Google Patents

Device for automatically controlling the diaphragm of a photographic or cinematographic lens as a function of the light intensity of the beam passing through the latter

Info

Publication number
FR821026A
FR821026A FR821026DA FR821026A FR 821026 A FR821026 A FR 821026A FR 821026D A FR821026D A FR 821026DA FR 821026 A FR821026 A FR 821026A
Authority
FR
France
Prior art keywords
photographic
diaphragm
function
light intensity
automatically controlling
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.)
Expired
Application number
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.)
FACIN SOC
Original Assignee
FACIN SOC
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 FACIN SOC filed Critical FACIN SOC
Application granted granted Critical
Publication of FR821026A publication Critical patent/FR821026A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • G03B7/085—Analogue circuits for control of aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR821026D 1936-08-01 1936-08-01 Device for automatically controlling the diaphragm of a photographic or cinematographic lens as a function of the light intensity of the beam passing through the latter Expired FR821026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR821026T 1936-08-01

Publications (1)

Publication Number Publication Date
FR821026A true FR821026A (en) 1937-11-25

Family

ID=9274926

Family Applications (1)

Application Number Title Priority Date Filing Date
FR821026D Expired FR821026A (en) 1936-08-01 1936-08-01 Device for automatically controlling the diaphragm of a photographic or cinematographic lens as a function of the light intensity of the beam passing through the latter

Country Status (1)

Country Link
FR (1) FR821026A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421476A (en) * 1943-06-18 1947-06-03 Rca Corp Photoelectric control apparatus for diaphragms
US2453693A (en) * 1946-09-03 1948-11-16 Charles W Armstrong Automatic diaphragm control
DE1043802B (en) * 1954-02-04 1958-11-13 Robot Berning & Co Device for setting an exposure factor for photographic layers
US2906187A (en) * 1954-01-07 1959-09-29 Dotson Kimes Entpr Automatic camera control
US3002435A (en) * 1956-08-23 1961-10-03 Revere Camera Co Camera having automatically controlled lens stop
US3013479A (en) * 1957-02-21 1961-12-19 Durst Julius Automatic diaphragm regulator for a photographic camera
DE1220251B (en) * 1956-08-23 1966-06-30 Minnesota Mining & Mfg Motorized film camera with an exposure controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421476A (en) * 1943-06-18 1947-06-03 Rca Corp Photoelectric control apparatus for diaphragms
US2453693A (en) * 1946-09-03 1948-11-16 Charles W Armstrong Automatic diaphragm control
US2906187A (en) * 1954-01-07 1959-09-29 Dotson Kimes Entpr Automatic camera control
DE1043802B (en) * 1954-02-04 1958-11-13 Robot Berning & Co Device for setting an exposure factor for photographic layers
US3002435A (en) * 1956-08-23 1961-10-03 Revere Camera Co Camera having automatically controlled lens stop
DE1220251B (en) * 1956-08-23 1966-06-30 Minnesota Mining & Mfg Motorized film camera with an exposure controller
US3013479A (en) * 1957-02-21 1961-12-19 Durst Julius Automatic diaphragm regulator for a photographic camera

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