FR74902E - Diaphragm automatically controlled by photocell - Google Patents

Diaphragm automatically controlled by photocell

Info

Publication number
FR74902E
FR74902E FR42007618A FR42007618A FR74902E FR 74902 E FR74902 E FR 74902E FR 42007618 A FR42007618 A FR 42007618A FR 42007618 A FR42007618 A FR 42007618A FR 74902 E FR74902 E FR 74902E
Authority
FR
France
Prior art keywords
photocell
automatically controlled
diaphragm automatically
diaphragm
controlled
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
FR42007618A
Other languages
French (fr)
Inventor
Paul-Ferdinand Royet
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
Application granted granted Critical
Publication of FR74902E publication Critical patent/FR74902E/en
Expired legal-status Critical Current

Links

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)
FR42007618A 1958-10-03 1959-02-04 Diaphragm automatically controlled by photocell Expired FR74902E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1211089T 1958-10-03

Publications (1)

Publication Number Publication Date
FR74902E true FR74902E (en) 1961-01-23

Family

ID=9675482

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1211089D Expired FR1211089A (en) 1958-10-03 1958-10-03 Diaphragm automatically controlled by photocell
FR42007618A Expired FR74902E (en) 1958-10-03 1959-02-04 Diaphragm automatically controlled by photocell

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1211089D Expired FR1211089A (en) 1958-10-03 1958-10-03 Diaphragm automatically controlled by photocell

Country Status (1)

Country Link
FR (2) FR1211089A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139804A (en) * 1960-05-03 1964-07-07 Agfa Ag Camera with automatic diaphragm

Also Published As

Publication number Publication date
FR1211089A (en) 1960-03-14

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