DE2213442C3 - Single lens reflex camera - Google Patents
Single lens reflex cameraInfo
- Publication number
- DE2213442C3 DE2213442C3 DE2213442A DE2213442A DE2213442C3 DE 2213442 C3 DE2213442 C3 DE 2213442C3 DE 2213442 A DE2213442 A DE 2213442A DE 2213442 A DE2213442 A DE 2213442A DE 2213442 C3 DE2213442 C3 DE 2213442C3
- Authority
- DE
- Germany
- Prior art keywords
- switch
- converter
- shutter
- aperture
- light
- 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
- G03B7/087—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
- G03B7/081—Analogue circuits
- G03B7/089—Analogue circuits for storage of exposure value in mirror reflex cameras
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Description
Filmerapfindlichkeits- (7) und ein Zeiteinstellpotentiometer (8),Film sensitivity (7) and a time setting potentiometer (8th),
Die Wirkungsweise der Blendeueinstellvorrichtung soll im folgenden beschrieben werden:The operation of the aperture adjustment device should be described below:
Bei Beginn der Vorprogrammstufe vor dem Verschlußablauf wird zur Belichtungsmessung zunächst der Zentralverschluß! geschlossen, so daß derWandler 3 nur noch unter dem Einfluß des Störlichts 9 steht. Gleichzeitig mit dem Schließen des Zentralverschlusses 1 wird der Schalter 5 geschlossen. Dadurch wird die Spannung am Eingang des Verstärkers 6 zu null, obgleich der Wandler 3 einen Fotostrom auf Grund des einfallenden Störlichts 9 verursacht. Dieser Fotostrom lädt den Kondensator 4 auf die Störlichtspannung U51 auf.At the beginning of the pre-program stage before the shutter sequence, the central shutter is used first for exposure measurement! closed, so that the transducer 3 is only under the influence of the stray light 9. Simultaneously with the closing of the central lock 1, the switch 5 is closed. As a result, the voltage at the input of the amplifier 6 becomes zero, although the converter 3 causes a photocurrent due to the incident interfering light 9. This photocurrent charges the capacitor 4 to the interfering light voltage U 51 .
Der Zentralverschluß 1 und der Schalter 5 werden nun geöffnet, und die Eingangsspannung am Eingang des Verstärkers wäre ohne das zusätzliche Nutzlicht 10 null. Der Wandler 3 erhält jedoch zusätzliches Nutzlicht 10, wodurch eine zusätzliche Nutzlichtspannung Un, also insgesamt an den Widerständen 7, 8 die Spannung (USI + Un) entsteht Da der Kondensator 4 vor dem öffnen des Zentralverschlusses 1 auf USI aufgeladen war, entsteht am Eingang des Verstärkers 6 nur die Nutzlichtspannung Un. über den Verstärker 6, der die Blende 2 betätigt, geschieht dann der Brückenabgleich in bekannter Weise.The central shutter 1 and the switch 5 are now opened, and the input voltage at the input of the amplifier would be zero without the additional useful light 10. The converter 3, however, receives additional useful light 10, which creates an additional useful light voltage U n , i.e. the total voltage (U SI + U n ) across the resistors 7, 8. Since the capacitor 4 was charged to U SI before the central shutter 1 was opened, only the useful light voltage U n is produced at the input of the amplifier 6 . The bridge adjustment then takes place in a known manner via the amplifier 6, which actuates the diaphragm 2.
Bei einer abgewandelten Ausführungsform der Schaltungsanordnung kann der Schalter 5 ein Transistor, Thyristor od. dgl. sein.In a modified embodiment of the circuit arrangement, the switch 5 can be a transistor, Thyristor or the like.
Bei einer weiteren Ausgestaltung der Erfindung wird eine Blende verwendet, die sich vollkommen schließen läßt. Dadurch kann an Stelle des Verschlusses 1 zur Übertragung des Störlichtpegels auf den Kondensator 4 die Blende 2 geschlossen werden. In diesem Falle wäre natürlich Schalter 5 mechanisch mit der Blende 2 so verbunden, daß er bei völlig geschlossener Blende ebenfalls schließtIn a further embodiment of the invention, a diaphragm is used that is completely lets close. This allows the interfering light level to be transmitted in place of the shutter 1 the capacitor 4, the shutter 2 are closed. In this case switch 5 would of course be mechanical connected to the diaphragm 2 so that it also closes when the diaphragm is completely closed
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (4)
40 F i g. 1 a eine Schaltungsanordnung bei gcschlos-Drawing shown schematically and is described below. It shows
40 Fig. 1 a a circuit arrangement with closed
kamera mit Zentralverschluß und Belichtungsregler, F i g. 1 b die Schaltungsanordnung bei offenemThe invention relates to a single-lens reflex shutter and closed switch,
camera with central shutter and exposure regulator, F i g. 1 b the circuit arrangement with the open
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2213442A DE2213442C3 (en) | 1972-03-20 | 1972-03-20 | Single lens reflex camera |
GB1181773A GB1381994A (en) | 1972-03-20 | 1973-03-12 | Single lens reflex camera |
JP3173173A JPS578451B2 (en) | 1972-03-20 | 1973-03-19 | |
HK823/76A HK82376A (en) | 1972-03-20 | 1976-12-30 | Single-lens reflex camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2213442A DE2213442C3 (en) | 1972-03-20 | 1972-03-20 | Single lens reflex camera |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2213442A1 DE2213442A1 (en) | 1973-10-04 |
DE2213442B2 DE2213442B2 (en) | 1974-06-06 |
DE2213442C3 true DE2213442C3 (en) | 1975-01-09 |
Family
ID=5839497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2213442A Expired DE2213442C3 (en) | 1972-03-20 | 1972-03-20 | Single lens reflex camera |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS578451B2 (en) |
DE (1) | DE2213442C3 (en) |
GB (1) | GB1381994A (en) |
HK (1) | HK82376A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2316812C2 (en) * | 1973-04-04 | 1982-10-21 | Rollei-Werke Franke & Heidecke Gmbh & Co Kg, 3300 Braunschweig | "Photographic aperture for a still camera" |
DE2703415C3 (en) * | 1977-01-28 | 1980-05-14 | Agfa-Gevaert Ag, 5090 Leverkusen | Photographic copier |
CN113552084A (en) * | 2021-07-29 | 2021-10-26 | 深圳市先亚生物科技有限公司 | System, method and device for eliminating interference of spectrum detection background signal |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3836921A (en) * | 1970-05-28 | 1974-09-17 | Asahi Optical Co Ltd | Camera eyepiece light compensation arrangement |
JPS5533050B2 (en) * | 1971-11-24 | 1980-08-28 |
-
1972
- 1972-03-20 DE DE2213442A patent/DE2213442C3/en not_active Expired
-
1973
- 1973-03-12 GB GB1181773A patent/GB1381994A/en not_active Expired
- 1973-03-19 JP JP3173173A patent/JPS578451B2/ja not_active Expired
-
1976
- 1976-12-30 HK HK823/76A patent/HK82376A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPS578451B2 (en) | 1982-02-16 |
HK82376A (en) | 1977-01-07 |
DE2213442B2 (en) | 1974-06-06 |
DE2213442A1 (en) | 1973-10-04 |
JPS498222A (en) | 1974-01-24 |
GB1381994A (en) | 1975-01-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: ROLLEI FOTOTECHNIC GMBH, 3300 BRAUNSCHWEIG, DE |
|
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |