DE687285C - Process for making the so-called rain streaks invisible during film playback by means of optical brightening - Google Patents

Process for making the so-called rain streaks invisible during film playback by means of optical brightening

Info

Publication number
DE687285C
DE687285C DE1938Z0024608 DEZ0024608D DE687285C DE 687285 C DE687285 C DE 687285C DE 1938Z0024608 DE1938Z0024608 DE 1938Z0024608 DE Z0024608 D DEZ0024608 D DE Z0024608D DE 687285 C DE687285 C DE 687285C
Authority
DE
Germany
Prior art keywords
film
making
optical brightening
during film
rain streaks
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
DE1938Z0024608
Other languages
German (de)
Inventor
Dr Werner Pistor
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon 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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Priority to DE1938Z0024608 priority Critical patent/DE687285C/en
Application granted granted Critical
Publication of DE687285C publication Critical patent/DE687285C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Description

Verfahren zum Unsichtbarmachen der sogenannten Regenstreifen bei Filmwiedergaben durch optische Aufhellung Die Erfindung bezieht sich auf ein Verfahren zum Unsichtbarmachen der durch Filmverletzungen (Kratzen, Schrammen) entstandenen sogenannten Regenstreifen. bei Filmwiedergaben durch optische Aufhellung.Process for making the so-called rain streaks invisible during film playback by optical brightening The invention relates to a method of rendering invisible the so-called rain streaks caused by film damage (scratches, scrapes). when playing films through optical brightening.

Bei den bekannten Verfahren dieser Art wird der Film beim Durchgang durch das Bildfenster finit einer Flüssigkeit vom gleichen Brechungsexponenten wie dem des Schichtträgers benetzt, die leicht flüchtig ist und schnell wieder verdunstet. Durch diese Benetzung werden die Filmverletzungen ausgefüllt, und es erfolgt eine Aufhellung des Bildes auf optischem Wege. Das Verfahren ist an sich verhältnismäßig einfach in seiner praktischen Durchführung an den Projektoren, hat jedoch den Nachteil, daß laufend die Benetzungsflüssigkeit verdunstet und dadurch die Projektionskabine in sehr starkem Maße diese Flüssigkeitsdämpfe enthält.In the known methods of this type, the film becomes as it passes through through the image window finite a liquid with the same refraction exponent as that of the substrate, which is highly volatile and quickly evaporates again. Through this wetting, the film damage is filled, and there is a Optical brightening of the image. The procedure in itself is proportionate simple in its practical implementation on the projectors, but has the disadvantage that continuously the wetting liquid evaporates and thereby the projection booth contains these liquid vapors to a very large extent.

Um diesen Nachteil zu vermeiden und um stärkere Aufhellung des Bildes zu erzielen, werden nach der Erfindung die durch die Filmverletzungen sich ergebenden dunklen Stellen des Films durch zusätzliches Einspiegeln von schräg auf den Film auffallenden Lichtstrahlen aufgehellt. Es kann hierzu unmittelbar in der Nähe des Bildfensters ein dieses umgebendes lichtzurückwerfendes Mittel (Spiegeltrichter) vorgesehen sein. Bei dieser schrägen Durchleuchtung treten infolge der Filmverletzungen die entsprechenden Lichtablenkungen ein, so daß durch das Seitenlicht eine Aufhellung der dunklen, durch Verletzungen bedingten Filmpartien entsteht und infolgedessen die Regenstreifen unsichtbar werden.To avoid this disadvantage and to brighten the picture to achieve, the results of the film injuries are according to the invention dark areas of the film by additionally mirroring diagonally onto the film brightened incident light rays. It can do this in the immediate vicinity of the Image window a light reflecting means surrounding this (mirror funnel) be provided. This oblique fluoroscopy occurs as a result of the film damage the corresponding light deflections, so that a brightening by the side light of the dark parts of the film caused by injuries and consequently the rain streaks become invisible.

Das spiegelnde Mittel kann ebene und'oder gekrümmte Oberflächen aufweisen.The reflective means can have flat and / or curved surfaces.

In der Zeichnung ist in Abb. i durch die mit Pfeilen gekennzeichneten Strahlen die Hereinspiegelung des über das Bildfenster hinausgehenden Lichtes dargestellt.In the drawing, Fig. I is indicated by the arrows Rays the reflection of the light going beyond the picture window.

Mit F ist der Film und mit B das Bildfenster bezeichnet. S S stellen die spiegelnden. Mittel dar, die nach Abb. i ebene und nach Abb. 2 und 3 gekrümmte Oberflächen zeigen.F is the film and B is the picture window. S S set the reflecting ones. Means represent the planar according to Fig. I and curved according to Fig. 2 and 3 Show surfaces.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zum Unsichtbarmachen der durch Filmverletzungen (Kratzer, Schrammen) entstandenen sogenannten Regenstreifen bei Filmwiedergaben durch optische Aufhellung, dadurch gekennzeichnet,- daß die durch die Filmverletzungen hervorgerufenen dunklen Stellen des Films durch zusätzliches Einspiegeln von schräg auf den Film auffallendem Licht aufgehellt werden. a. Einrichtung zur Ausübung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß unmittelbar in der Nähe des Bildfensters (B) ein dieses umgebendes lichtzurückwerfendes Mittel (S S) (Spiegeltrichter) vorgesehen ist. 3. Einrichtung nach Anspruch a, dadurch gekennzeichnet, daß das spiegelnde Mittel ebene und/oder gekrümmte Oberflächen aufweist.PATENT CLAIMS: i. Procedure for making the film breaches invisible (Scratches, scrapes) so-called rain streaks during film playback by optical brightening, characterized in that - that caused by the film damage dark areas of the film caused by additional mirroring in at an angle light incident on the film can be brightened. a. Facility for exercising the Method according to claim i, characterized in that in the immediate vicinity of the picture window (B) a light reflecting means (S S) surrounding it (mirror funnel) is provided. 3. Device according to claim a, characterized in that the having reflective means flat and / or curved surfaces.
DE1938Z0024608 1938-06-05 1938-06-05 Process for making the so-called rain streaks invisible during film playback by means of optical brightening Expired DE687285C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1938Z0024608 DE687285C (en) 1938-06-05 1938-06-05 Process for making the so-called rain streaks invisible during film playback by means of optical brightening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1938Z0024608 DE687285C (en) 1938-06-05 1938-06-05 Process for making the so-called rain streaks invisible during film playback by means of optical brightening

Publications (1)

Publication Number Publication Date
DE687285C true DE687285C (en) 1940-01-26

Family

ID=7626189

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1938Z0024608 Expired DE687285C (en) 1938-06-05 1938-06-05 Process for making the so-called rain streaks invisible during film playback by means of optical brightening

Country Status (1)

Country Link
DE (1) DE687285C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745927C (en) * 1940-04-20 1944-05-30 Zeiss Ikon Ag Process for making the so-called rain streaks invisible during film playback by means of optical brightening

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745927C (en) * 1940-04-20 1944-05-30 Zeiss Ikon Ag Process for making the so-called rain streaks invisible during film playback by means of optical brightening

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