DE727102C - Process for the production of a demonstrable positive optical tone recording on a screen-free film - Google Patents

Process for the production of a demonstrable positive optical tone recording on a screen-free film

Info

Publication number
DE727102C
DE727102C DE1930727102D DE727102DD DE727102C DE 727102 C DE727102 C DE 727102C DE 1930727102 D DE1930727102 D DE 1930727102D DE 727102D D DE727102D D DE 727102DD DE 727102 C DE727102 C DE 727102C
Authority
DE
Germany
Prior art keywords
screen
positive optical
production
film
free film
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
Application number
DE1930727102D
Other languages
German (de)
Inventor
Dr Fritz Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of DE727102C publication Critical patent/DE727102C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/12—Cinematrographic processes of taking pictures or printing
    • G03C5/14—Cinematrographic processes of taking pictures or printing combined with sound-recording

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

Verfahren zur Herstellung einer vorführfähigen positiven Lichttonaufzeichnung auf einem rasterfreien Film Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer vorführfähigen positiven Lichttonaufzeichnung auf einem rasterfreien Film und besteht darin, daß die Tonaufzeichnung auf einen Film aufgenommen wird, der nach einem Umkehrverfahren behandelt wird. Die Benutzung von Umkehrverfahren für Bildfilme ist bekannt. Hier wird das Umkehrverfahren in der Regel deshalb benutzt, damit man den Originalfilm selbst vorführen und die Herstellung eines besonderen Positivfilms ersparen kann. Es hat sich nun bei Untersuchungen. der Erfinderin herausgestellt, daß die Benutzung derartiger Umkehrverfahren bei Tonfilmen Vorteile für die Tonaufzeichnung mit sich bringt. Insbesondere ist dadurch eine wesentliche Verbesserung des Frequenzganges möglich.Process for making a demonstrable positive light tone recording on a screenless film The invention relates to a method of manufacture a demonstrable positive light tone recording on a screen-free film and consists in that the sound recording is recorded on a film which is treated according to a reverse procedure. The use of reverse procedures for Pictorial films is known. The reverse procedure is usually used here, so that you can show the original film yourself and make a special one Can save positive films. It has now been investigated. highlighted by the inventor, that the use of such inversion methods in sound films has advantages for sound recording brings with it. In particular, this is a significant improvement in the frequency response possible.

Das Verfahren kann z. B. in der Weise durchgeführt werden, daß der Film, auf dem die Tonaufzeichnung aufgenommen worden ist, .entwickelt wird, daß dann das entwickelte Silber aufgelöst und schließlich auch der Rest des Halogensilbers nach ,entsprechender Belichtung entwickelt wird. Da es bei Umkehrverfahren häufig mit Schwierigkeiten verknüpft ist, bestimmt vorgegebene Kontraste in der Aufzeichnung zu erreichen, so ist es zweckmäßig, bei dem neuen Verfahren die Dicke der Emulsionsschicht und diejenigeKonstante, die charakteristisch ist für den bei verlängerter Entwicklung maximal erreichbaren Kontrast (y.oo), derart aufeinander abzustimmen, daß nach der zweiten Entwicklung ohne besondere Kunstgriffe die richtigen Kontraste. erreicht wenden. Für die Tonaufzeichnung ist dies besonders wichtig, da bei ungeradlinigem Verlauf derjenigen Charakteristik, die die Beziehung zwischen den Logarithmen der Transparenz und der photographischen Helligkeit angibt, die Töne falsch wieder gegieben und störende Töne miterzeugt werden.The method can e.g. B. be carried out in such a way that the Film on which the sound recording has been recorded is developed so that then the developed silver dissolved and finally the rest of the halogen silver as well after, appropriate exposure is developed. As it is common in reverse procedures associated with difficulties determines predetermined contrasts in the recording To achieve, it is expedient in the new process to adjust the thickness of the emulsion layer and that constant which is characteristic of the prolonged development maximum achievable contrast (y.oo), to be coordinated with one another in such a way that after the second development without special tricks the right contrasts. achieved turn around. This is particularly important for sound recording, since it is odd Course of those characteristics that determine the relationship between the logarithms of the Transparency and the photographic brightness indicates the tones are wrongly reproduced and disturbing tones are also generated.

In weiterer Ausbildung des Verfahrens ist es möglich, von dem umgekehrten Originalfilm Kopien herzustellen und auch diese Kopien nach dem Umkehrverfahren zu entwickeln.In a further development of the method it is possible to do the reverse Make copies of the original film and also these copies using the reverse process to develop.

Claims (2)

PATENTANSPRÜCHE: r. Verfahren zur Herstellung einer vorführfähigen positiven Lichttonaufzeichnung auf einem rasterfreien Film, dadurch gekennzeichnet, daß der Film, auf dem die photographische Aufzeichnung der Töne ursprünglich erfolgt ist, nach einem an sich bekannten Umkehrverfahren behandelt wird, bei dem z. B. nach Auflösen des entwickelten Silbers der Rest des Halogensilbers entwickelt wird. PATENT CLAIMS: r. Process for producing a demonstrable positive optical sound recording on a screen-free film, thereby characterized in that the film on which the photographic record of the sounds is originally done, treated according to a known inversion process becomes, where z. B. after dissolving the developed silver, the remainder of the halogen silver is being developed. 2. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß auch die Kopien des umgekehrten Films nach einem Umkehrverfahren behandelt werden.2. The method according to claim r, characterized in that also the copies of the reversed film are treated by a reversal process.
DE1930727102D 1930-12-20 1930-12-20 Process for the production of a demonstrable positive optical tone recording on a screen-free film Expired DE727102C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE727102T 1930-12-20

Publications (1)

Publication Number Publication Date
DE727102C true DE727102C (en) 1942-10-27

Family

ID=6635378

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930727102D Expired DE727102C (en) 1930-12-20 1930-12-20 Process for the production of a demonstrable positive optical tone recording on a screen-free film

Country Status (1)

Country Link
DE (1) DE727102C (en)

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