DE856231C - Optical wedge for sound recorders and duplicators - Google Patents
Optical wedge for sound recorders and duplicatorsInfo
- Publication number
- DE856231C DE856231C DEK4975D DEK0004975D DE856231C DE 856231 C DE856231 C DE 856231C DE K4975 D DEK4975 D DE K4975D DE K0004975 D DEK0004975 D DE K0004975D DE 856231 C DE856231 C DE 856231C
- Authority
- DE
- Germany
- Prior art keywords
- optical wedge
- duplicators
- wedge
- sound recorders
- curve
- 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
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Description
Optischer Keil für Tonaufzeichnungs- und Vervielfältigungsgeräte Es ist bekannt, Tonaufzeichnungen mit Hilfe eines Graukeils herzustellen, der selbst oder dessen Bild in Abhängigkeit, von dien aufzuzeichnenden Tönen gesteuert wird.Optical wedge for sound recorders and duplicators Es it is known to make sound recordings with the help of a gray wedge that itself or its image is controlled depending on the sounds to be recorded.
Es ist ferner bekannt, den Graukeil so auszubilden, daß der Einfluß der gekrümmten Trans parenzkurve, die durch das Filmmaterial bedingt ist, kompensiert wird.It is also known to design the gray wedge so that the influence the curved transparency curve, which is caused by the film material, compensated will.
Es ist an sich bereits schwierig, übliche Graukeile herzustellen. Wenn ein derartiger Graukeil nun noch einen solchen Transparenzverlauf bekommen soll, daß eine Kompensation ermöglicht wird, so vergrößern sich die Schwierigkeiten, da es schwierig ist, den richtigen Verlauf rechnerisch oder zeichnerisch zu ermitteln.It is already difficult in and of itself to produce conventional gray wedges. If such a gray wedge now has such a transparency gradient if compensation is to be made possible, the difficulties increase because it is difficult to determine the correct course arithmetically or graphically.
Um diese Schwierigkeiten zu vermeiden, wird gemäß der Erfindung vorgeschlagen, einen solchen Graukeil zu verwenden, der durch Belichtung eines Filmstreifens mit einer dem Aufzeichnungsnegativ entsprechenden Charakteristik über einen Keil entstanden ist, dessen Lichtdurchlässigkeit sich mit der Länge proportional ändert. Dieser Keil kann je nach der Form der zu kompensierenden Kurve als Negativ oder als Positiv, d. h. eine Kopie von dem Negativ, verwenidet, werden und besitzt einen: nahezu idealen Verlauf der Kompensationskurve. Die Kompensations @kurve liegt bei der Kombination eines Negativs ungefähr invers zur Tränsparenzkurve des Negativs. Entsprechend ist dIer Verlauf der Kennar linie des Keils zu wählen, wenn bei der Aufzeichnung auch bereits. eine Kompensation der Pos-itivtransparenzkurve vorgenommen werden soll.In order to avoid these difficulties, it is proposed according to the invention, to use such a gray wedge obtained by exposing a film strip with a characteristic corresponding to the recording negative was created via a wedge whose light transmission changes proportionally with length. This Wedge can be negative or positive, depending on the shape of the curve to be compensated, d. H. a copy of the negative, used, and has a: almost ideal Course of the compensation curve. The compensation @curve is included the combination of a negative roughly inversely to the transparency curve of the negative. Correspondingly, the course of the characteristic line of the wedge is to be selected if the Record already. a compensation of the positive transparency curve was carried out shall be.
Ein: weiterer Vorteil der Erfindung liegt darin, daß die Herstellung des Keils mit derselben Apparatur erfolgen kann, mit der auch die Schwingungen aufgezeichnet werden. Auf diese Weise gehen, die der Apparatur eigenen Fehler, z. B. Farbfehler der Optik, mit in die Kurve ein. Ferner können auch die Belichtungs, und Entwicklungsbedhngungen genau so gewählt werden wie bei der endgültigen Aufzeichnung, so däB auch die diesbezüglichen. Fehler mit eingehen.Another advantage of the invention is that the production of the wedge can be done with the same apparatus with which the vibrations are recorded will. In this way, the errors inherent in the apparatus, e.g. B. Color defects the optics, with in the curve. Furthermore, the exposure and development conditions should be chosen exactly as in the final recording, so are the relevant ones. Including errors.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK4975D DE856231C (en) | 1938-03-31 | 1938-03-31 | Optical wedge for sound recorders and duplicators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK4975D DE856231C (en) | 1938-03-31 | 1938-03-31 | Optical wedge for sound recorders and duplicators |
Publications (1)
Publication Number | Publication Date |
---|---|
DE856231C true DE856231C (en) | 1952-11-20 |
Family
ID=7210605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK4975D Expired DE856231C (en) | 1938-03-31 | 1938-03-31 | Optical wedge for sound recorders and duplicators |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE856231C (en) |
-
1938
- 1938-03-31 DE DEK4975D patent/DE856231C/en not_active Expired
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