CA1061625A - Automatic exposure control system with unitary trim - Google Patents
Automatic exposure control system with unitary trimInfo
- Publication number
- CA1061625A CA1061625A CA242,822A CA242822A CA1061625A CA 1061625 A CA1061625 A CA 1061625A CA 242822 A CA242822 A CA 242822A CA 1061625 A CA1061625 A CA 1061625A
- Authority
- CA
- Canada
- Prior art keywords
- scene
- flash
- optical path
- brightness
- unblocking
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000003466 anti-cipated effect Effects 0.000 claims abstract description 16
- 238000005286 illumination Methods 0.000 claims abstract description 15
- 230000004044 response Effects 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 38
- 230000000903 blocking effect Effects 0.000 claims description 22
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 11
- 230000011514 reflex Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
-
- 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
-
- 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
- G03B7/091—Digital circuits
- G03B7/097—Digital circuits for control of both exposure time and aperture
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/36—Sliding rigid plate
- G03B9/40—Double plate
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
- Shutters For Cameras (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/538,108 US3975744A (en) | 1974-08-05 | 1975-01-02 | Automatic exposure control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1061625A true CA1061625A (en) | 1979-09-04 |
Family
ID=24145529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA242,822A Expired CA1061625A (en) | 1975-01-02 | 1975-12-30 | Automatic exposure control system with unitary trim |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS6148139B2 (enrdf_load_stackoverflow) |
| CA (1) | CA1061625A (enrdf_load_stackoverflow) |
| DE (1) | DE2558253A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2296867A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1529209A (enrdf_load_stackoverflow) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPS59189328A (ja) * | 1983-04-13 | 1984-10-26 | Fuji Photo Optical Co Ltd | シヤツタの最大開口径規制装置 |
| US10136210B2 (en) | 2015-03-17 | 2018-11-20 | Koss Corporation | Personal acoustic systems and flexible earpiece mounts for the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3326103A (en) * | 1964-12-09 | 1967-06-20 | Polaroid Corp | Auxiliary shutter timing mechanism |
| US3464332A (en) * | 1966-05-12 | 1969-09-02 | Polaroid Corp | Automatic exposure control system |
| DE2163294C3 (de) * | 1970-12-24 | 1981-06-11 | Polaroid Corp., 02139 Cambridge, Mass. | Photographischer Apparat |
| US3832722A (en) * | 1971-08-03 | 1974-08-27 | Polaroid Corp | Apparatus and system for flash photography |
-
1975
- 1975-12-23 DE DE19752558253 patent/DE2558253A1/de not_active Ceased
- 1975-12-24 GB GB5291575A patent/GB1529209A/en not_active Expired
- 1975-12-30 CA CA242,822A patent/CA1061625A/en not_active Expired
- 1975-12-30 FR FR7540127A patent/FR2296867A1/fr active Granted
-
1976
- 1976-01-05 JP JP75576A patent/JPS6148139B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5194224A (enrdf_load_stackoverflow) | 1976-08-18 |
| JPS6148139B2 (enrdf_load_stackoverflow) | 1986-10-22 |
| FR2296867B1 (enrdf_load_stackoverflow) | 1982-11-12 |
| DE2558253A1 (de) | 1976-07-08 |
| FR2296867A1 (fr) | 1976-07-30 |
| GB1529209A (en) | 1978-10-18 |
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