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DE2557389A1 - Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes - Google Patents

Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes

Info

Publication number
DE2557389A1
DE2557389A1 DE19752557389 DE2557389A DE2557389A1 DE 2557389 A1 DE2557389 A1 DE 2557389A1 DE 19752557389 DE19752557389 DE 19752557389 DE 2557389 A DE2557389 A DE 2557389A DE 2557389 A1 DE2557389 A1 DE 2557389A1
Authority
DE
Germany
Prior art keywords
liquid quartz
liquid
quartz diaphragm
cameras
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.)
Pending
Application number
DE19752557389
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 DE19752557389 priority Critical patent/DE2557389A1/en
Publication of DE2557389A1 publication Critical patent/DE2557389A1/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Crystal (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

The shutter consists of a liquid crystal (1) between two glass plates (2,3) uniformly layered. It has an anode (6) and a cathode (7) connected to a circuit (8). Very high shutter speeds may be achieved, owing to lack of inertia of mechanical moving parts. A control impulse from an electronic circuit is used to make the shutter transparent. A LV impulse may be used. The liquid crystal consists of a liquid quartz composition.

Description

Fliissig-Quarz-BlendeLiquid quartz diaphragm

fiir Photoapparate, Filmkameras und Filmproj ektoren Die Erfindung betrifft eine 1431üssig-Quarz-Blende fiir Photoapparate, Filmkameras und Filmprojektoren zur Aufnahme und Wiedergabe von Filmbildern.for cameras, film cameras and film projectors The invention relates to a liquid quartz screen for cameras, film cameras and film projectors for recording and playing back film images.

Es ist bekannt, das rotierende Sektorenblenden zur Unterbreehung des Strahlenganges und Zentralverschlüsse oder Schlitzverschlüsse zur kurzen Öffnung des Strahlenganges in optischen Instrumenten verwendet werden.It is known that the 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 Erfindung ermöglicht Unterbrechung des Strahlenganges ohne rotierende Sektorenblende in Filmkameras und Filmprojektoren, weiter ermöglicht folgende Erfindung kurzes öffnen des Strahlenganges ohne Zentralverschluss oder Schlitzverschluss in Photoapparaten.The following invention enables the beam path to be interrupted without rotating sector shutter in film cameras and film projectors, further enabled following invention briefly open the beam path without a central shutter or Focal plane shutter in cameras.

Das der Erfindung zugrundeliegende Prinzip besteht darin, daß eine Flüssig-Quarz-Blende vor oder hinter dem Objektiv vorgesehen ist, die den Strahlengang öffnet oder schließt.The principle underlying the invention is that a Liquid quartz diaphragm is provided in front of or behind the lens, which defines the beam path opens or closes.

Durch einen Steuerimpuls wird die Flüssig-Quarz-Blende geöffnet und der Strahlengang wird frei, oder durch einen Steuerimpuls wird die Flüssig-Quarz-Blende geschlossen und der Strahlengang unterbrochen.The liquid quartz shutter is opened by a control pulse and the beam path is cleared, or the liquid-quartz diaphragm is opened by a control pulse closed and the beam path interrupted.

Die Erfindung besteht darin, daß die Blende aus flüssigem Quarz besteht, das zwischen Glas oder Folie vorgesehen ist.The invention consists in that the diaphragm consists of liquid quartz, which is provided between glass or film.

Der flüssige Quarz wird durch einen Stromkreis mit Anode und Kathode je nach Niedervolt-Spannung durchlässig oder undurchlässig für Lichtstrahlen gesteuert.The liquid quartz is made by a circuit with anode and cathode Depending on the low voltage, it is controlled to be permeable or impermeable to light rays.

Die Erfindung wird im filgenden an Hand der Zeichnung näher erläntert: Fig. 1 zeigt einen Querschnitt durch die Blende. Es zeigt die Anordunng der Flüssig-Quarz-Blende zwischen Gläsern oder Folie 2 und 3, welche teils mit Zinkoxyd 4 und 5 beschichtet sind, sowie die Anordnung der Anode 6 und Kathode 7 mit Stromkreis 8.The invention is explained in more detail in the following with reference to the drawing: Fig. 1 shows a cross section through the diaphragm. It shows the arrangement of the liquid quartz diaphragm between glasses or foil 2 and 3, which are partly coated with zinc oxide 4 and 5 are, as well as the arrangement of the anode 6 and cathode 7 with circuit 8.

Die Wirkungsweise dieser Anordnung ist folgende: Die klarlichtdurchlässige Flüssig-Quarz-Blende wird lichtundurchlässig, wenn der Stroukreis 8 mit Niedervolt-Spannung geschlossen wird. Bei geöffnetem Stromkreis wird der flüssige Quarz wieder klarlichtdurchlässig.The mode of operation of this arrangement is as follows: The one that is transparent to light Liquid quartz diaphragm becomes opaque when the Stroukkreis 8 with low voltage is closed. When the circuit is open, the liquid quartz becomes transparent again.

Liste der Bezugszeichen 1 Flüssig-Quarz-Blende 2,3 Glas oder Folie 4,5 Zinnoxyd 6 Anode 7 Kathode 8 StromkreisList of reference symbols 1 liquid quartz diaphragm 2, 3 glass or foil 4.5 tin oxide 6 anode 7 cathode 8 circuit

Claims (7)

Patentansprüche 1. Flüssig-Quarz-Blende für Photoapparate, Filmkameras und Filmprojekeoren, bei der flüssiger Quarz vorgesehen ist, dadurch gekennzeichnet, daß eine Flüssig-Quarz-Blende im, vor oder hinter dem Objektiv des Photoapparates oder der Filmakamera oder des lililmprojektors vorgesehen ist, wobei die Blende aus flüssigem Quarz (1) besteht, das zwischen zwei Gläsern (2) und (3) gleichmäßig besciiiehtet liegt.Die Flüssig-Quarz-Blende ist mit einer Anode (6) und Kathode (7) und Stromkreis (8) vorgesehen.Claims 1. Liquid quartz diaphragm for cameras, film cameras and film projectors, in which liquid quartz is provided, characterized in that, that a liquid quartz diaphragm in, in front of or behind the lens of the camera or the film camera or the film projector is provided, the aperture consists of liquid quartz (1), which between two glasses (2) and (3) evenly The liquid quartz diaphragm has an anode (6) and a cathode (7) and circuit (8) provided. 2. Flüssig-Quarz-Blende nach Anspruch 1, dadurch gekennzeichnet, daB die Gläser oder Folie (2) und (3) mit Zinndioxyd (4) und (5) beschichtet sind. 2. Liquid quartz diaphragm according to claim 1, characterized in that that the glasses or foil (2) and (3) are coated with tin dioxide (4) and (5). 3. Flüssig-Quarz-Blende nach Anspruch 1 und 2, dadurch gekennzeichnet, daß das Glas oder Folie (2) mit einer Schicht ferroelektrischer Kristalle oder ferromagnetischer Kristalle vorgesehen ist. 3. Liquid quartz diaphragm according to claim 1 and 2, characterized in that that the glass or film (2) with a layer of ferroelectric crystals or ferromagnetic Crystals is provided. 4. Flüssig-Quarz-Blende nach Anspruch 1, 2 und 3, dadurch gekennzeichnet, daß die Flüssig-Quarz-Blende mit elektromagnetischen Wellen oder mit Ultraschall geöffnet und geschlossen wird, 4. Liquid quartz diaphragm according to claim 1, 2 and 3, characterized in that that the liquid quartz diaphragm with electromagnetic waves or with ultrasound is opened and closed, 5. Flüssig-Quarz-Blende nach Anspruch 1,2,3 und 4, dadurch gekennzeichnet, daß Flüssig-Quarz zwischen Prismen oder Linsen oder Prisma und Linse vorgesehen ist.5. Liquid quartz diaphragm according to claim 1, 2, 3 and 4, characterized in that liquid quartz between prisms or lenses or prism and lens is provided. 6. Flüssig-Quarz-Blende nach Anspruch 1,2,3,4 und 5, dadurch gekennzeichnet, daß Flüssig-Quarz zwischen glasklaren Kunststoff-Folien oder -Platten vorgesehen ist. 6. Liquid quartz diaphragm according to claim 1, 2, 3, 4 and 5, characterized in that that liquid quartz is provided between crystal-clear plastic films or plates is. 7. Flüssig-Quarz-Blende nach Auspruch 1,2,3,4,5 und6, dadurch gekennzeichnet, daß die Flüssig-Quarz-Blende mit einem Stramkreis und einem Steuerimpulsgeber vorgesehen ist.7. liquid quartz diaphragm according to claim 1, 2, 3, 4, 5 and 6, characterized in that that the liquid quartz diaphragm is provided with a wire circuit and a control pulse generator is.
DE19752557389 1975-12-19 1975-12-19 Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes Pending DE2557389A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752557389 DE2557389A1 (en) 1975-12-19 1975-12-19 Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752557389 DE2557389A1 (en) 1975-12-19 1975-12-19 Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes

Publications (1)

Publication Number Publication Date
DE2557389A1 true DE2557389A1 (en) 1977-06-30

Family

ID=5964930

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752557389 Pending DE2557389A1 (en) 1975-12-19 1975-12-19 Liquid crystal shutter with electronic actuation - is placed in or behind objective in cameras and has transparent electrodes

Country Status (1)

Country Link
DE (1) DE2557389A1 (en)

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