DE464626C - Device for controlling a Kerr cell based on electrical birefringence - Google Patents

Device for controlling a Kerr cell based on electrical birefringence

Info

Publication number
DE464626C
DE464626C DET31367D DET0031367D DE464626C DE 464626 C DE464626 C DE 464626C DE T31367 D DET31367 D DE T31367D DE T0031367 D DET0031367 D DE T0031367D DE 464626 C DE464626 C DE 464626C
Authority
DE
Germany
Prior art keywords
kerr cell
controlling
cell based
transformer
electrical
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
DET31367D
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.)
Telefunken AG
Original Assignee
Telefunken AG
Publication date
Priority to DET31367D priority Critical patent/DE464626C/en
Application granted granted Critical
Publication of DE464626C publication Critical patent/DE464626C/en
Expired legal-status Critical Current

Links

Classifications

    • 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 
    • G02F1/07—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 electro-optical liquids exhibiting Kerr effect

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Description

Die auf der elektrischen Doppelbrechung beruhende Kerrzelle ist als trägheitsloses' Lichtsteuerorgan beispielsweise für die Zwecke der Bildtelegraphie bekannt. Die zu seiner Betätigung notwendigen, verhältnismäßig hohen elektrischen Spannungen werden gewöhnlich mit Verstärkerröhren erzeugt. Als Kopplungsglied zwischen dem Endverstärkerrohr und der Kerrzelle benutzt man, falls esThe Kerr cell, which is based on electrical birefringence, is known as an inertialess' Light control member known, for example, for the purposes of image telegraphy. To his Relatively high electrical voltages required for actuation are common generated with amplifier tubes. As a coupling element between the power amplifier tube and the Kerr cell is used if it is

ίο sich um Wechselspannungen handelt, vorzugsweise einen Transformator, um gleichzeitig die Spannung hinaufzutransformiereii. Dieser Transformator muß, um möglichst wirksam zu sein, primärseitig auf das. Verstärkerrohr angepaßt sein; sekundär könnte die Impedanz praktisch beliebig hoch sein, da die Kerrzelle einen äußerst hohen Widerstand darstellt,, beispielsweise in der Größenordnung von ι o9 Ohm. Eine Vermehrung der Sekundärwindungen des Transformators bedeutet aber keinen Vorteil mehr, sobald die Eigenkapazität des Transformators anfängt, einen merklichen Nebenschluß für die erzeugte Spannung zu. bilden. Aus diesem Grunde kann man zwischen Endverstärkerrohr und Kerrzelle nur Transformatoren von verhältnis-' mäßig geringem Übersetzungsverhältnis verwenden. Günstiger werden die Verhältnisse in dieser Beziehung, wenn es angängig ist, die Primärwindungszahl des' Transformators bedeutend herabzusetzen und gleichzeitig sekundär die hohe Windungszahl beizubehalten. Erfindungsgemäß ist dies möglich, wenn man direkt von einem Mikrophon über einen Transformator auf die Kerrzelle arbeitet. Wegen des geringen Widerstandes eines Mikrophons kann man dann das Übersetzungsverhältnis sehr groß wählen. In der Zeichnung ist diese Kombination schematisch dargestellt. ίο it is about alternating voltages, preferably a transformer, in order to transform the voltage up at the same time. In order to be as effective as possible, this transformer must be adapted on the primary side to the amplifier tube; Secondly, the impedance could be practically as high as desired, since the Kerr cell represents an extremely high resistance, for example in the order of magnitude of ι o 9 ohms. However, an increase in the secondary windings of the transformer is no longer an advantage as soon as the internal capacitance of the transformer begins to cause a noticeable shunt for the voltage generated. form. For this reason, you can contact ver between Endverstärkerrohr and Kerr cell only transformers proportionate 'excessively low ratio. The conditions in this regard are more favorable if it is appropriate to significantly reduce the number of primary turns of the transformer and at the same time to maintain the high number of turns on a secondary basis. According to the invention, this is possible if you work directly from a microphone via a transformer to the Kerr cell. Because of the low resistance of a microphone, the transmission ratio can then be selected to be very high. This combination is shown schematically in the drawing.

M bedeutet das Mikrophon, B1 die Mikrophonbatterie, T den Transformator, K, die Kerrzelle und B2 eine nicht unbedingt nötige, aber mit Vorteil zu benutzende Vorspannungsquelle für die Kerrzelle. M means the microphone, B 1 the microphone battery, T the transformer, K the Kerr cell and B 2 a bias voltage source for the Kerr cell which is not absolutely necessary but which can be used with advantage.

Diese Einrichtung gestattet eine direkte Umwandlung von Tonimpulsen in Lichtimpulse. Um mit ihr ankommende elektrische Signale in Lichtimpulse umzuwandeln, macht man zunächst die Signale akustisch hörbar und läßt sie dann auf das Mikrophon einwirken. This device allows a direct conversion of sound impulses into light impulses. In order to convert incoming electrical signals into light impulses, the signals are first made acoustically audible and then let it act on the microphone.

Claims (1)

Patentanspruch:Claim: Einrichtung zur Steuerung einer auf elektrischer Doppelbrechung beruhenden Kerrzelle, dadurch gekennzeichnet, daß die Primärseite eines Transformators unter Zwischenschaltung einer Batterie an ein Mikrophon, die Sekundärseite, evtl. auch über eine Batterie, an die Kerrzelle gelegt ist.Device for controlling an electrical birefringence based Kerr cell, characterized in that the primary side of a transformer under Interconnection of a battery to a microphone, the secondary side, possibly also via a battery to which the Kerr cell is connected.
DET31367D Device for controlling a Kerr cell based on electrical birefringence Expired DE464626C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET31367D DE464626C (en) Device for controlling a Kerr cell based on electrical birefringence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET31367D DE464626C (en) Device for controlling a Kerr cell based on electrical birefringence

Publications (1)

Publication Number Publication Date
DE464626C true DE464626C (en) 1928-08-23

Family

ID=7556266

Family Applications (1)

Application Number Title Priority Date Filing Date
DET31367D Expired DE464626C (en) Device for controlling a Kerr cell based on electrical birefringence

Country Status (1)

Country Link
DE (1) DE464626C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6539836B2 (en) 2000-06-07 2003-04-01 Honda Giken Kogyo Kabushiki Kaisha Piston for internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6539836B2 (en) 2000-06-07 2003-04-01 Honda Giken Kogyo Kabushiki Kaisha Piston for internal combustion engine

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