DE767856C - Camera with a short focal length lens, especially a cinema camera - Google Patents

Camera with a short focal length lens, especially a cinema camera

Info

Publication number
DE767856C
DE767856C DEV35852D DEV0035852D DE767856C DE 767856 C DE767856 C DE 767856C DE V35852 D DEV35852 D DE V35852D DE V0035852 D DEV0035852 D DE V0035852D DE 767856 C DE767856 C DE 767856C
Authority
DE
Germany
Prior art keywords
camera
focal length
short focal
stop surface
cinema
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
DEV35852D
Other languages
German (de)
Inventor
Wilhelm Baumgaertner
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.)
Voigtlander AG
Original Assignee
Voigtlander 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 Voigtlander AG filed Critical Voigtlander AG
Priority to DEV35852D priority Critical patent/DE767856C/en
Application granted granted Critical
Publication of DE767856C publication Critical patent/DE767856C/en
Expired legal-status Critical Current

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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Accessories Of Cameras (AREA)

Description

Die Erfindung betrifft eine Kamera mit kurzbrennweitigem Objektiv, insbesondere Kinokamera, und mit einstellbarer Objektivanschlagfläche.The invention relates to a camera with a short focal length lens, especially cinema camera, and with adjustable lens stop surface.

Es ist bekannt, die Fokussierung des Kameraobjektivs mittels eines Brennweitenausgleichringes, der zwecks Raumersparnis in bezug auf die Gesamtanordnung der Kamera hinter dem Entfernungseinstellring in einem doppelkapselartig ausgebildeten Objektivträger verdeckt angeordnet sein kann. vorzunehmen.It is known to focus the camera lens by means of a Focal length compensation ring for the purpose of saving space in relation to the overall arrangement the camera behind the distance setting ring in a double capsule-like design Lens carrier can be arranged concealed. to undertake.

Diese bekannten Anordnungen weisen jedoch bei erhöhten Genauigkeitsanforderungen, wie sie bei kurzbrennweitigen, insbesondere Kinokameras gestellt werden müssen, den Fachteil auf, daß das Gewinde des Brennweitenausgleichringes, welches mittels Konterringes festgelegt wird, infolge des in ihm enthaltenen Spieles kippt, so daß unter Umständen eine dem Zweck dieser :Anordnungen zuwiderlaufende Nachbearbeitung der Anschlagfläche erforderlich wird.However, with increased accuracy requirements, these known arrangements as they have to be placed with short focal length cameras, especially cinema cameras, the compartment on that the thread of the focal length compensation ring, which means Counter ring is set, tilts as a result of the game contained in it, so that possibly a post-processing contrary to the purpose of these: orders the stop surface is required.

Erfindungsgemäß wird daher vorgeschlagen, daß die Anschlagfläche für das Objektiv. welches in eine an der Bildbühne der Kamera befindliche Fassung einsetzbar ist, von einem Distanzstück gebildet wird, das auf einer Schrägfläche quer zur optischen Achse verschiebbar ist und dadurch die Anschlagfläche in Richtung der optischen Achse einstellt.According to the invention it is therefore proposed that the stop surface for the objective. which can be used in a socket located on the picture stage of the camera is, is formed by a spacer on an inclined surface transverse to the optical Axis is displaceable and thereby the stop surface in the direction of the optical Axis adjusts.

In der Zeichnung ist eine Ausführungsform des Erfindungsgegenstands dargestellt.In the drawing is an embodiment of the subject matter of the invention shown.

Die Bildbühne b bildet in bekannter Weise mit dem eigentlichen Gehäuse bi ein Stück. Im Inneren des Gehäuses b ist eine Schrägfläche f vorgesehen, gegen welche sich das Distanzstück a mit einer gleichen Schrägfläche anlegt. Eine Einstellschraube ä hat ihr zugehöriges 'Muttergewinde in dem Gehäuse b und erfaßt mit ihrem anderen Ende das Distanzstück a in einem Langloch Ma derart, daß die 1Iitnahme des Distanzstückes a bei Drehung der Schraube g durch zwei Ansätze i und k an dieser Schraube in deren Längsrichtung erfolgt, wodurch die beiden Schrägflächen f sich gegeneinander verschieben und dadurch eine -Verschiebung des Distanzstückes a in Richtung der Objektivachse eintritt. Durch eine Schraube l kann die ein-' gestellte Lage des Distanzstfickes a fixiert «erden.The picture stage b forms in a known manner with the actual housing bi a piece. In the interior of the housing b, an inclined surface f is provided, against which the spacer a creates with the same inclined surface. An adjustment screw ä has its associated 'female thread in the housing b and engages with its other End the spacer a in an elongated hole Ma in such a way that the 1Iitführung of the spacer a when turning the screw g through two lugs i and k on this screw in their Takes place in the longitudinal direction, whereby the two inclined surfaces f move against each other and thereby a displacement of the spacer a in the direction of the objective axis entry. A screw 1 can be used to adjust the position of the spacer a fixed «earth.

Nachdem die Anschlagfläche wie vorstehend fokussiert ist, wird das Objektiv c mittels seines Gewindes ci in das entsprechende Muttergewinde e der Bildbühne b in bekannter Weise eingeschraubt.After the stop surface is focused as above, the Objective c by means of its thread ci in the corresponding nut thread e of the picture stage b screwed in in a known manner.

Claims (1)

PATENTANSPRCCII: Kamera mit kurzbrennweitigem Objektiv, insbesondere Kinokamera, und mit einstellbarer Objektivanschlagfläche, dadurch gekennzeichnet, daß das Objektiv in eine an der Bildbühne befindliche Fassung einsetzbar ist und daß die Anschlagfläche von einem Distanzstück (a) gebildet ist, das auf einer Schrägfläche quer zur optischen Achse verschiebbar ist und dadurch die Anschlagfläche in Richtung der optischen Achse einstellt. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Deutsche Patentschrift Nr. 568 054; schweizerische Patentschrift Nr. 131 605; USA.-Patentschrift N r. 2 109 807. PATENT APPLICATION II: Camera with a short focal length lens, in particular a cinema camera, and with an adjustable lens stop surface, characterized in that the lens can be inserted into a mount located on the image stage and that the stop surface is formed by a spacer (a) which is on an inclined surface transversely to the optical Axis is displaceable and thereby adjusts the stop surface in the direction of the optical axis. To distinguish the subject matter of the invention from the state of the art, the following publications were considered in the grant procedure: German Patent No. 568 054; Swiss Patent No. 131 605; U.S. Patent No. 2 109 807.
DEV35852D 1939-04-19 1939-04-19 Camera with a short focal length lens, especially a cinema camera Expired DE767856C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV35852D DE767856C (en) 1939-04-19 1939-04-19 Camera with a short focal length lens, especially a cinema camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV35852D DE767856C (en) 1939-04-19 1939-04-19 Camera with a short focal length lens, especially a cinema camera

Publications (1)

Publication Number Publication Date
DE767856C true DE767856C (en) 1954-03-08

Family

ID=7589965

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV35852D Expired DE767856C (en) 1939-04-19 1939-04-19 Camera with a short focal length lens, especially a cinema camera

Country Status (1)

Country Link
DE (1) DE767856C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419910A1 (en) * 1993-06-09 1994-12-22 Goldstar Honeywell Co Ltd Focus-fixing device for a CCD camera

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH131605A (en) * 1928-05-22 1929-02-28 Jacques Bogopolsky Lens mount.
DE568054C (en) * 1931-05-22 1933-01-13 August Nagel Dr Device for adjusting the lenses on photographic recording apparatus
US2109807A (en) * 1936-07-11 1938-03-01 Tajima Toyojiro Camera with solid bellows

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH131605A (en) * 1928-05-22 1929-02-28 Jacques Bogopolsky Lens mount.
DE568054C (en) * 1931-05-22 1933-01-13 August Nagel Dr Device for adjusting the lenses on photographic recording apparatus
US2109807A (en) * 1936-07-11 1938-03-01 Tajima Toyojiro Camera with solid bellows

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4419910A1 (en) * 1993-06-09 1994-12-22 Goldstar Honeywell Co Ltd Focus-fixing device for a CCD camera

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