DE2721739C2 - - Google Patents
Info
- Publication number
- DE2721739C2 DE2721739C2 DE2721739A DE2721739A DE2721739C2 DE 2721739 C2 DE2721739 C2 DE 2721739C2 DE 2721739 A DE2721739 A DE 2721739A DE 2721739 A DE2721739 A DE 2721739A DE 2721739 C2 DE2721739 C2 DE 2721739C2
- Authority
- DE
- Germany
- Prior art keywords
- flash
- transistor
- capacitor
- circuit
- shutter
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 68
- 238000010304 firing Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 7
- 230000005284 excitation Effects 0.000 description 7
- 230000001960 triggered effect Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 238000005282 brightening Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000881 depressing effect Effects 0.000 description 4
- 238000012217 deletion Methods 0.000 description 3
- 230000037430 deletion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N Glycolaldehyde Chemical compound OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 241000158147 Sator Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer 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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- 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
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
-
- 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
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0514—Separate unit
- G03B2215/056—Connection with camera, e.g. adapter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stroboscope Apparatuses (AREA)
- Exposure Control For Cameras (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/686,020 US4072964A (en) | 1976-05-13 | 1976-05-13 | Scene light responsive variable quench time delay for quench strobe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2721739A1 DE2721739A1 (de) | 1977-12-01 |
| DE2721739C2 true DE2721739C2 (US06534493-20030318-C00166.png) | 1991-06-27 |
Family
ID=24754578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772721739 Granted DE2721739A1 (de) | 1976-05-13 | 1977-05-13 | Photographischer apparat |
Country Status (6)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159870A (en) * | 1978-02-21 | 1979-07-03 | Eastman Kodak Company | Exposure control apparatus including general purpose lag compensation |
| US4185905A (en) * | 1978-04-03 | 1980-01-29 | Polaroid Corporation | Dual purpose flash/strobe socket assembly for a photographic camera |
| US4315676A (en) * | 1978-11-13 | 1982-02-16 | Polaroid Corporation | Camera with auto ranging focusing and flash fire control |
| DE2906880A1 (de) * | 1979-02-22 | 1980-09-04 | Braun Ag | Elektronenblitzgeraet mit automatischer lichtmengendosierung |
| US4268138A (en) * | 1979-05-29 | 1981-05-19 | Polaroid Corporation | Follow focus flash arrangement |
| US4268146A (en) * | 1979-07-03 | 1981-05-19 | Polaroid Corporation | Camera with folding flash unit |
| US4255030A (en) * | 1979-09-13 | 1981-03-10 | Polaroid Corporation | Camera with proportional fill flash quench strobe |
| US4346971A (en) * | 1979-10-01 | 1982-08-31 | Polaroid Corporation | Photographic apparatus with controlled shutter blade time out |
| US4317620A (en) * | 1980-01-17 | 1982-03-02 | Polaroid Corporation | Variable proportional fill flash |
| US4444479A (en) * | 1981-01-05 | 1984-04-24 | Polaroid Corporation | Photographic system with slow burn flash bulb |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3570381A (en) * | 1967-07-03 | 1971-03-16 | Konishiroku Photo Ind | Programmed electronic shutter |
| US3756132A (en) * | 1972-08-11 | 1973-09-04 | Honeywell Inc | Adapter circuit for use with auto exposure camera |
| US3993928A (en) * | 1975-12-19 | 1976-11-23 | Honeywell Inc. | Extended range correct exposure annunciator |
| GB1577757A (en) * | 1976-04-08 | 1980-10-29 | Polaroid Corp | Photographic camera with artificial illumination control |
-
1976
- 1976-05-13 US US05/686,020 patent/US4072964A/en not_active Expired - Lifetime
-
1977
- 1977-03-31 CA CA275,198A patent/CA1083873A/en not_active Expired
- 1977-05-10 FR FR7714219A patent/FR2351431A2/fr active Granted
- 1977-05-11 JP JP5417077A patent/JPS52139419A/ja active Pending
- 1977-05-12 GB GB20022/77A patent/GB1582791A/en not_active Expired
- 1977-05-13 DE DE19772721739 patent/DE2721739A1/de active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| CA1083873A (en) | 1980-08-19 |
| US4072964A (en) | 1978-02-07 |
| GB1582791A (en) | 1981-01-14 |
| FR2351431A2 (fr) | 1977-12-09 |
| FR2351431B2 (US06534493-20030318-C00166.png) | 1984-12-28 |
| DE2721739A1 (de) | 1977-12-01 |
| JPS52139419A (en) | 1977-11-21 |
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| DE2560173C2 (US06534493-20030318-C00166.png) | ||
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8125 | Change of the main classification |
Ipc: G03B 15/05 |
|
| 8176 | Proceedings suspended because of application no: |
Ref document number: 2715829 Country of ref document: DE Format of ref document f/p: P |
|
| 8178 | Suspension cancelled | ||
| AF | Is addition to no. |
Ref country code: DE Ref document number: 2715829 Format of ref document f/p: P |
|
| AF | Is addition to no. |
Ref country code: DE Ref document number: 2715829 Format of ref document f/p: P |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition |