FR2495790A1 - Dispositif de commande automatique d'exposition pour appareil photographique du type a photometrie directe a travers l'objectif - Google Patents
Dispositif de commande automatique d'exposition pour appareil photographique du type a photometrie directe a travers l'objectif Download PDFInfo
- Publication number
- FR2495790A1 FR2495790A1 FR8122159A FR8122159A FR2495790A1 FR 2495790 A1 FR2495790 A1 FR 2495790A1 FR 8122159 A FR8122159 A FR 8122159A FR 8122159 A FR8122159 A FR 8122159A FR 2495790 A1 FR2495790 A1 FR 2495790A1
- Authority
- FR
- France
- Prior art keywords
- circuit
- film
- shutter
- terminal
- voltage
- 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.)
- Granted
Links
- 238000005375 photometry Methods 0.000 title abstract description 26
- 238000004804 winding Methods 0.000 claims description 12
- 238000009877 rendering Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 38
- 230000004044 response Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 210000000941 bile Anatomy 0.000 description 3
- 244000309466 calf Species 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 235000003197 Byrsonima crassifolia Nutrition 0.000 description 2
- 240000001546 Byrsonima crassifolia Species 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000001020 rhythmical effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 101000954141 Homo sapiens Vasopressin V1b receptor Proteins 0.000 description 1
- NRFJZTXWLKPZAV-UHFFFAOYSA-N N-(2-oxo-3-thiolanyl)acetamide Chemical compound CC(=O)NC1CCSC1=O NRFJZTXWLKPZAV-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 102100037188 Vasopressin V1b receptor Human genes 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
- G03B7/08—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
- G03B7/083—Analogue circuits for control of exposure time
-
- 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
- G03B7/099—Arrangement of photoelectric elements in or on the camera
- G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
- G03B7/0997—Through the lens [TTL] measuring
- G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
- G03B7/09974—Through the lens [TTL] measuring in mirror-reflex cameras using the film or shutter as sensor light reflecting member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17245280A JPS5796318A (en) | 1980-12-05 | 1980-12-05 | Automatic exposure control device of ttl direct photometric camera |
| JP56025759A JPS57139723A (en) | 1981-02-23 | 1981-02-23 | Automatic exposure controller of ttl direct measurement camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2495790A1 true FR2495790A1 (fr) | 1982-06-11 |
| FR2495790B1 FR2495790B1 (enExample) | 1985-04-12 |
Family
ID=26363448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8122159A Granted FR2495790A1 (fr) | 1980-12-05 | 1981-11-26 | Dispositif de commande automatique d'exposition pour appareil photographique du type a photometrie directe a travers l'objectif |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4408852A (enExample) |
| DE (1) | DE3148071C2 (enExample) |
| FR (1) | FR2495790A1 (enExample) |
| GB (1) | GB2090005B (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4390258A (en) * | 1980-12-15 | 1983-06-28 | Olympus Optical Co. Ltd. | Photomeric circuit for camera |
| US4473744A (en) * | 1981-12-29 | 1984-09-25 | Olympus Optical Company, Ltd. | Photometric apparatus for camera |
| JPS6064580A (ja) * | 1983-09-19 | 1985-04-13 | Asahi Seimitsu Kk | Ｃｃｔｖカメラ用レンズの自動絞り制御装置 |
| JPS6069967A (ja) * | 1983-09-26 | 1985-04-20 | Asahi Seimitsu Kk | Ｃｃｔｖカメラ用レンズの自動絞り制御装置 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2277355A1 (fr) * | 1974-07-02 | 1976-01-30 | Olympus Optical Co | Appareil photometrique pour camera reflex a objectif unique |
| GB2016718A (en) * | 1978-03-14 | 1979-09-26 | Rollei Werke Franke Heidecke | Shutter Timing Circuit |
| GB2044472A (en) * | 1979-03-09 | 1980-10-15 | Olympus Optical Co | Shutter control circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219525A (en) * | 1975-08-06 | 1977-02-14 | Minolta Camera Co Ltd | Ttl light measure circuit for the camera |
| US4325615A (en) * | 1978-08-09 | 1982-04-20 | Minolta Camera Kabushiki Kaisha | Exposure control system for single lens reflex cameras |
| JPS5697326A (en) * | 1979-12-31 | 1981-08-06 | Minolta Camera Co Ltd | Exposure time control device of camera |
-
1981
- 1981-11-19 US US06/322,853 patent/US4408852A/en not_active Expired - Fee Related
- 1981-11-26 FR FR8122159A patent/FR2495790A1/fr active Granted
- 1981-12-04 GB GB8136580A patent/GB2090005B/en not_active Expired
- 1981-12-04 DE DE3148071A patent/DE3148071C2/de not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2277355A1 (fr) * | 1974-07-02 | 1976-01-30 | Olympus Optical Co | Appareil photometrique pour camera reflex a objectif unique |
| GB2016718A (en) * | 1978-03-14 | 1979-09-26 | Rollei Werke Franke Heidecke | Shutter Timing Circuit |
| GB2044472A (en) * | 1979-03-09 | 1980-10-15 | Olympus Optical Co | Shutter control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3148071C2 (de) | 1984-06-20 |
| DE3148071A1 (de) | 1982-06-16 |
| GB2090005A (en) | 1982-06-30 |
| US4408852A (en) | 1983-10-11 |
| GB2090005B (en) | 1984-03-21 |
| FR2495790B1 (enExample) | 1985-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |