GB1571818A - Photographic exposure control apparatus - Google Patents
Photographic exposure control apparatus Download PDFInfo
- Publication number
- GB1571818A GB1571818A GB4860276A GB4860276A GB1571818A GB 1571818 A GB1571818 A GB 1571818A GB 4860276 A GB4860276 A GB 4860276A GB 4860276 A GB4860276 A GB 4860276A GB 1571818 A GB1571818 A GB 1571818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- value
- exposure
- original
- aperture
- 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
- 230000004888 barrier function Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000005286 illumination Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 210000000188 diaphragm Anatomy 0.000 description 80
- 230000005669 field effect Effects 0.000 description 17
- 239000004020 conductor Substances 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000001228 spectrum 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
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
- G03B27/80—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus in dependence upon automatic analysis of the original
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752552589 DE2552589A1 (de) | 1975-11-24 | 1975-11-24 | Vorrichtung zur automatischen belichtungsregelung bei mikrofilm-durchlaufkameras |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1571818A true GB1571818A (en) | 1980-07-23 |
Family
ID=5962466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4860276A Expired GB1571818A (en) | 1975-11-24 | 1976-11-22 | Photographic exposure control apparatus |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2552589A1 (enExample) |
| FR (1) | FR2332551A1 (enExample) |
| GB (1) | GB1571818A (enExample) |
| IT (1) | IT1069253B (enExample) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132780A (en) * | 1982-11-26 | 1984-07-11 | Loge Dunn Instr Inc | Apparatus for maintaining a cathode ray tube image in relation to the light acceptance range of a photographic film |
| GB2138582A (en) * | 1983-02-28 | 1984-10-24 | Canon Kk | Image Reproducing Apparatus |
| GB2221547A (en) * | 1988-07-11 | 1990-02-07 | Brother Ind Ltd | Image recording apparatus with exposure control |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2746990C2 (de) * | 1977-10-19 | 1979-10-25 | Agfa-Gevaert Ag, 5090 Leverkusen | Belichtungsautomatik für Mikrofilm-Durchlaufaufnahmegeräte |
| DE2945166A1 (de) | 1979-11-08 | 1981-05-14 | Dr. Böger Duplomat Apparate KG (GmbH & Co), 2000 Wedel | Schaltungsanordnung zur steuerung der belichtungszeit von reproduktionskameras |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2101932A (en) * | 1934-04-20 | 1937-12-14 | Ig Farbenindustrie Ag | Exposure control |
| DE1162192B (de) * | 1957-10-23 | 1964-01-30 | Agfa Ag | Fotografische Kopiervorrichtung mit einer fotoelektrischen Einrichtung zur selbsttaetigen Regelung der Belichtungszeit |
| US3120161A (en) * | 1961-10-18 | 1964-02-04 | De Witt H Pickens | Diaphragm controlling system |
| DE1214524B (de) * | 1965-03-22 | 1966-04-14 | Mikrofilm G M B H | Verfahren und Vorrichtung zur Ausuebung desselben zu einer automatischen Belichtungssteuerung bei Microfilm-Durchlaufkameras |
| DE2163688C3 (de) * | 1971-12-22 | 1981-02-19 | Agfa-Gevaert Ag, 5090 Leverkusen | Vorrichtung zur Belichtungsregelung in einem fotografischen Kopiergerät |
| US3795445A (en) * | 1973-03-15 | 1974-03-05 | Eastman Kodak Co | Slope control exposure control apparatus |
-
1975
- 1975-11-24 DE DE19752552589 patent/DE2552589A1/de not_active Withdrawn
-
1976
- 1976-11-09 FR FR7633742A patent/FR2332551A1/fr active Granted
- 1976-11-22 GB GB4860276A patent/GB1571818A/en not_active Expired
- 1976-11-22 IT IT5228676A patent/IT1069253B/it active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132780A (en) * | 1982-11-26 | 1984-07-11 | Loge Dunn Instr Inc | Apparatus for maintaining a cathode ray tube image in relation to the light acceptance range of a photographic film |
| GB2138582A (en) * | 1983-02-28 | 1984-10-24 | Canon Kk | Image Reproducing Apparatus |
| GB2221547A (en) * | 1988-07-11 | 1990-02-07 | Brother Ind Ltd | Image recording apparatus with exposure control |
| US5001511A (en) * | 1988-07-11 | 1991-03-19 | Brother Kogyo Kabushiki Kaisha | Image recording apparatus having exposure control unit |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2332551B1 (enExample) | 1983-02-04 |
| DE2552589A1 (de) | 1977-05-26 |
| IT1069253B (it) | 1985-03-25 |
| FR2332551A1 (fr) | 1977-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |