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DE493640C - Cinematograph with optical compensation for image migration - Google Patents

Cinematograph with optical compensation for image migration

Info

Publication number
DE493640C
DE493640C DET34800D DET0034800D DE493640C DE 493640 C DE493640 C DE 493640C DE T34800 D DET34800 D DE T34800D DE T0034800 D DET0034800 D DE T0034800D DE 493640 C DE493640 C DE 493640C
Authority
DE
Germany
Prior art keywords
mirror
indexing wheel
polygonal
optical compensation
cinematograph
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
DET34800D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DET34800D priority Critical patent/DE493640C/en
Application granted granted Critical
Publication of DE493640C publication Critical patent/DE493640C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B41/00Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
    • G03B41/02Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film
    • G03B41/04Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator
    • G03B41/06Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator with rotating reflecting member

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)

Description

Kinematograph mit optischem Ausgleich der Bildwanderung Es ist bekannt, bei Vielkantinnenspiegeln, die zum optischen Ausgleich der Bildwanderung dienen, das Filmschaltrad starr mit dem gleichachsigen Vielkantinnenspiegel zu verbinden, um jede relative Bewegung zwischen beiden Teilen zu vermeiden, die eine Unruhe des Bildes erzeugen würde. Bei den bisher bekannten Konstruktionen dieser Art ist es notwendig, das Objektiv nebst den die Strahlen ablenkenden Prismen innerhalb des Umfanges des Vielkantinnenspiegels und des Filmschaltrades anzubringen. Daraus ergibt sich eine besondere Ausbildung des Filmschaltrades, welches an seiner Peripherie für die Lichtstrahlen durchgängig sein muß, was mechanisch viele Unbequemlichkeiten hat.Cinematograph with optical compensation for image wandering It is known in the case of polygonal internal mirrors that serve to visually compensate for image migration, to rigidly connect the film indexing wheel to the coaxial polygonal mirror, in order to avoid any relative movement between the two parts that would cause a restlessness of the Image would produce. In the previously known constructions of this type, it is necessary, the lens together with the prisms deflecting the rays within the To attach the circumference of the polygon mirror and the film indexing wheel. From this it follows a special training of the film indexing wheel, which on its periphery must be transparent for the light rays, which mechanically many inconveniences Has.

Die Erfindung bezweckt, dies zu vermeiden und das Filmschaltrad in der gewöhnlichen Weise als undurchsichtige Trommel auszubilden. Sie erreicht dies dadurch, daß der Vielkantinnenspiegel erheblich größer als das Filmschaltrad gestaltet wird, und daß das Objektiv nebst den die Strahlen ablenkenden Prismen in dem Raum zwischen innerer Oberfläche des Vielkantinnenspiegels und äußerer Oberfläche des Filmschaltrades zu liegen kommt. Auf diese Weise braucht das Projektionslicht bzw. Aufnahmelicht nicht mehr durch das Filmschaltrad hindurchzutreten, sondern kann an diesem vorbei durch den Film auf das Objektiv nebst den die Strahlen ablenkenden Prismen gelangen. Auch derjenige Spiegel, welcher bei der Projektion die Strahlen nach der Reflexion an dem Vielkantinnenspiegel aus dessen Ebene wieder herausführt bzw. bei der Aufnahme vor der Reflexion an dem Vielkantinnenspiegel in diese Ebene hineinführt, kann dann ebenfalls in dem Raum zwischen innerer Oberfläche des Vielkantinnenspiegels und äußerer Oberfläche des Filmschaltrades untergebracht werden. Ein Ausführungsbeispiel nach der Erfindung ist in den beiden Zeichnungen schematisch veranschaulicht.The aim of the invention is to avoid this and the film indexing wheel in the usual way as an opaque drum. She achieves this in that the polygonal mirror is designed to be considerably larger than the film indexing wheel becomes, and that the lens together with the prisms deflecting the rays in the room between the inner surface of the polygon mirror and the outer surface of the Film indexing wheel comes to rest. In this way, the projection light or The recording light can no longer pass through the film indexing wheel, but can past this through the film onto the lens together with the one that deflects the rays Get prisms. Also the mirror that emits the rays during projection after the reflection on the polygonal inner mirror leads out of its plane again or when recording before the reflection on the polygonal mirror in this plane leads into it, can then also in the space between the inner surface of the polygonal mirror and the outer surface of the film indexing wheel. An embodiment according to the invention is illustrated schematically in the two drawings.

Abb. i ist ein senkrechter Schnitt durch die Drehungsachse.Fig. I is a vertical section through the axis of rotation.

Abb. 2 ist eine Aufsicht.Fig. 2 is a top view.

Es ist angenommen, daß der Kinematograph zur Projektion benutzt wird. a ist die Achse, b der Boden der Spiegeltrommel, c ein gerade in Wirkung befindlicher Spiegel, d ist ein oberes Spiegelprisma, e das Objektiv, f ein unteres Spiegelprisma, g ist das undurchsichtige Filmschaltrad, welches über der Ebene der Spiegeltrommel liegt und mit dieser fest verbunden ist, da ist der Film, welcher vom Kondensor i her beleuchtet wird. k ist der Spiegel, welcher die Strahlen nach Reflexion an dem Vielkantinnenspiegel c wieder aus der Ebene des Vielkantinnenspiegels herausführt, so daß sie in der Richtung der Drehungsachse zum Projektionsschirm hin verlaufen. L ist die Rolle, welche den Film an das Filmschaltrad andrückt, na ist das Filmfenster.It is assumed that the cinematograph is used for projection. a is the axis, b the bottom of the mirror drum, c a mirror currently in operation, d is an upper mirror prism, e the lens, f a lower mirror prism, g is the opaque film indexing wheel, which lies above the plane of the mirror drum and with it is firmly connected, there is the film, which is illuminated by the condenser i. k is the mirror which, after reflection on the polygonal internal mirror c, leads the rays out of the plane of the polygonal internal mirror so that they run in the direction of the axis of rotation towards the projection screen. L is is the roller which presses the film to the Filmschaltrad na, the film gate.

Claims (1)

PATENTANSPRUCH: Kinematographischer Aufnahme- oder Projektionsapparat mit Vielkantinnenspiegel und starr damit verbundenem Filmschaltrad zum optischen Ausgleich der Bildwanderung, dadurch gekennzeichnet, daß das Objektiv nebst den die Strahlen ablenkenden Prismen sowie der die Strahlen aus der Reflexionsebene des Vielkantinnenspiegels herausführende bzw. in diese Ebene hineinführende Spiegel in dem Raum zwischen innerer Oberfläche des Vielkantinnenspiegels und äußerer Oberfläche des Filmschaltrades untergebracht sind. PATENT CLAIM: Cinematographic recording or projection apparatus with polygonal internal mirror and rigidly connected film indexing wheel for the optical compensation of the image wandering, characterized in that the objective, along with the prisms which deflect the rays and the mirror leading out of the reflection plane of the polygonal mirror or leading into this plane in the space between the inner surface of the polygonal mirror and the outer surface of the film indexing wheel are accommodated.
DET34800D Cinematograph with optical compensation for image migration Expired DE493640C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET34800D DE493640C (en) Cinematograph with optical compensation for image migration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET34800D DE493640C (en) Cinematograph with optical compensation for image migration

Publications (1)

Publication Number Publication Date
DE493640C true DE493640C (en) 1930-03-10

Family

ID=7558758

Family Applications (1)

Application Number Title Priority Date Filing Date
DET34800D Expired DE493640C (en) Cinematograph with optical compensation for image migration

Country Status (1)

Country Link
DE (1) DE493640C (en)

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