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 latterInfo
- 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
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)
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)
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 |
-
1936
- 1936-08-01 FR FR821026D patent/FR821026A/en not_active Expired
Cited By (7)
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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