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DE2558293A1 - Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts - Google Patents

Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts

Info

Publication number
DE2558293A1
DE2558293A1 DE19752558293 DE2558293A DE2558293A1 DE 2558293 A1 DE2558293 A1 DE 2558293A1 DE 19752558293 DE19752558293 DE 19752558293 DE 2558293 A DE2558293 A DE 2558293A DE 2558293 A1 DE2558293 A1 DE 2558293A1
Authority
DE
Germany
Prior art keywords
liquid crystal
film
substance
projector
clear plastic
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.)
Withdrawn
Application number
DE19752558293
Other languages
German (de)
Inventor
Helmut Seifert
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
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 Individual filed Critical Individual
Priority to DE19752558293 priority Critical patent/DE2558293A1/en
Publication of DE2558293A1 publication Critical patent/DE2558293A1/en
Withdrawn legal-status Critical Current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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

A liquid crystal shutter replaces the rotating sector shutter of a film camera or projector and thereby ensures against all mechanical faults. The liquid crystal material is enclosed between two glass or clear plastic surfaces within, in front of, or behind the lens and the opening and closing is controlled by pulsed control signals. The sensitive material may be a mesomorphic liquid crystal material which is opaque or transparent according to the voltage applied to a pair of electrodes between which the crystal film is located.

Description

Flüssigkristall-BlendeLiquid crystal shutter

ftlr Photoapparate, Filmkameras und Filmprojektoren Die Erfindung betrifft eine FlUssigkristall-Blende für Photoapparate, Filmkameras und Filmproj ektoren zur Auinahme und Wiedergabe von Filmbildera.for cameras, film cameras and film projectors The invention relates to a liquid crystal screen for cameras, film cameras and film projectors ectors for taking and playing back film imagesa.

Es ist bekannt, daß rotierende Sektorenblenden zur Unterbrechung des Strahlenganges und Zentralverschlüsse oder Schlitzverschlüsse zur kurzen Öffnung des Strahlenganges in optischen Instrumenten verwendet werden.It is known that rotating sector diaphragms to interrupt the Beam path and central shutters or focal plane shutters for short opening of the beam path can be used in optical instruments.

Folgende ErSindung ermöglicht Unterbrechung des Strahlenganges ohne rotierende Sekt orenbl ende in Filmkanieras und Filmprojektoren, weiter ermöglicht folgende Erfindung kurzes öffnen des Strahlenganges ohne Schlltzverschluss oder Zentralverschluss in optischen Instrumenten.The following invention enables the beam path to be interrupted without Rotating sector shutter in film caniers and film projectors, further enabled following invention briefly opening the beam path without a protective shutter or Central lock in optical instruments.

Das der Erfindung zugrundeliegende Prinzip besteht darin, daß eine Flüssigkristall-Blende im, vor oder hinter den Objektiv vorgesehen ist, die den Strahlengang durch einen Steuerimpuis öffnet oder schließt.The principle underlying the invention is that a Liquid crystal diaphragm is provided in, in front of or behind the lens that controls the Beam path through a control pulse opens or closes.

Die Erfindung besteht darin, daß die Blende aus einer eesozorphen Substanz, die unter der Bezeichnung @ flüssige Kristalle", oder nematische Flüssigkristalle bekannt sind, da@ zwischen Glas oder Folie vorgesehen ist. Die Fldsslgkristalle werden durch einen Stromkreis mit Anode und Kathode Je nach Niedervolt-Spannung durchlässig oder undurchlässig für Lichtstrahlen gesteuert.The invention consists in that the diaphragm consists of an eesozorphic Substance known as "liquid crystals", or nematic liquid crystals are known because @ is provided between glass or film. The liquid crystals are through a circuit with anode and cathode depending on the low voltage controlled to be transparent or opaque to light rays.

Die Wirkungsweise dieser Anordnung ist folgende: Die klarlichtdurchlässige Flüssigkristall-Blende wird lichtundurchlässig, wenn der Stromkreis mit Niedervolt-Spannung geschlossen wird. Bei geöffnetem Stromkreis wird der Flüssigkristall wieder klarlichtdurchlässig.The mode of operation of this arrangement is as follows: The one that is transparent to light Liquid crystal shutter becomes opaque when the circuit is at low voltage is closed. When the circuit is open, the liquid crystal becomes transparent again.

Claims (5)

Patentansprüche M4 Flüssigkristall-Blende ür Photoapparate, Filmkameras und Filmprojektoren, bei der eine Flüssigkristall-Substanz vorgesehen ist, dadurch gekennzeichnet, daß eine Flüssigkristall-Substanz im oder vor oder hinter dem Objektiv des Photoapparates oder der Filmkamera oder des Filmprojektors vorgesehen sind, wobei die Blende aus einer mesomorphen Substanz, die unter der Bezeichnung "flüssige Kristalle", oder nematische Flüssigkristalle bekannt sind, vorgesehen sind. Claims M4 liquid crystal shutter for cameras, film cameras and film projectors in which a liquid crystal substance is provided thereby characterized in that a liquid crystal substance in or in front of or behind the lens the camera or the film camera or the film projector are provided, the diaphragm made of a mesomorphic substance known as "liquid Crystals ", or nematic liquid crystals known, are provided. Die Flüssigkristall-Substanz liegt gleichmässig beschichtet zwischen zwei Gläsern oder Folien aus glasklarem Kunststoff, die an einem Ende mit einer Anode und am anderen Ende mit einer Kathode vorgesehen sind, und einem Stromkreis mit Steuerimpulsgeber vorgesehen ist0 2o Flüssigkristall-Blende für optische Instrumente, bei der eine Flüssigkristall-Substanz vorgesehen ist, dadurch gekennzeichnet, daß eine Flüssigkristall-Substanz zwischen Prismen oder Linsen oder Prisma und Linse vorgesehen ist.the Liquid crystal substance lies evenly coated between two glasses or Sheets made of clear plastic that have an anode at one end and an anode at the other End with a cathode are provided, and a circuit with control pulse generator is provided0 2o liquid crystal panel for optical instruments, in which a Liquid crystal substance is provided, characterized in that a liquid crystal substance is provided between prisms or lenses or prism and lens. 3. Flüssigkristall-Blende nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Gläser oder glasklarer Kunstoff oder Linsen und Prismen aus glasklarem Kunststoff mit Zinndioyyd beschichtet sind. 3. Liquid crystal panel according to claim 1 and 2, characterized in that that the glasses or clear plastic or lenses and prisms made of clear plastic are coated with tin dioxide. 4. Flüssigkristall-Blende nach Anspruch 1, 2 und 3, dadurch gekennzeichnet, daß die Gläser oder glasklare Kunststoff mit ferroelektrischen Kristallen oder ferromagnetischen Kristallen beschichtet oder vorgesehen sind. 4. Liquid crystal panel according to claim 1, 2 and 3, characterized in that that the glasses or crystal clear plastic with ferroelectric crystals or ferromagnetic Crystals are coated or provided. 5. Flüssigkristall-Blende nach Anspruch 1, 2, 3 und 4, dadurch gekennzeichnets daß die Flüssigkristall-Blende mit elektromagnetischen Wellen oder mit Ultraschall geöffnet und geschlossen wird.5. Liquid crystal panel according to claim 1, 2, 3 and 4, characterized that the liquid crystal diaphragm with electromagnetic waves or with ultrasound is opened and closed.
DE19752558293 1975-12-23 1975-12-23 Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts Withdrawn DE2558293A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752558293 DE2558293A1 (en) 1975-12-23 1975-12-23 Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752558293 DE2558293A1 (en) 1975-12-23 1975-12-23 Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts

Publications (1)

Publication Number Publication Date
DE2558293A1 true DE2558293A1 (en) 1977-07-07

Family

ID=5965423

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752558293 Withdrawn DE2558293A1 (en) 1975-12-23 1975-12-23 Liq. crystal shutter for film camera or projector - is made opaque by LV application and replaces mechanically operating parts

Country Status (1)

Country Link
DE (1) DE2558293A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010554A1 (en) * 1978-11-02 1980-05-14 Rollei-Werke Franke & Heidecke GmbH + Co KG Device for optically suppressing the motion of picture changes in projecting apparatuses
DE3231285A1 (en) * 1981-08-25 1983-04-07 Kawamura, Takao, Sakai, Osaka LIQUID CRYSTAL DEVICE, IN PARTICULAR FOR THE NUMERICAL DISPLAY
DE3302332A1 (en) * 1982-01-25 1983-08-11 Kawamura, Takao, Sakai, Osaka LIQUID CRYSTAL DEVICE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010554A1 (en) * 1978-11-02 1980-05-14 Rollei-Werke Franke & Heidecke GmbH + Co KG Device for optically suppressing the motion of picture changes in projecting apparatuses
DE3231285A1 (en) * 1981-08-25 1983-04-07 Kawamura, Takao, Sakai, Osaka LIQUID CRYSTAL DEVICE, IN PARTICULAR FOR THE NUMERICAL DISPLAY
DE3302332A1 (en) * 1982-01-25 1983-08-11 Kawamura, Takao, Sakai, Osaka LIQUID CRYSTAL DEVICE

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