CN103149680B - Electrowetting-effect-based two-path liquid optical switch - Google Patents

Electrowetting-effect-based two-path liquid optical switch Download PDF

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CN103149680B
CN103149680B CN201310104146.6A CN201310104146A CN103149680B CN 103149680 B CN103149680 B CN 103149680B CN 201310104146 A CN201310104146 A CN 201310104146A CN 103149680 B CN103149680 B CN 103149680B
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ito electrode
light
chromonic
liquid
optical switch
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CN103149680A (en
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王琼华
刘超
李磊
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Sichuan University
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Sichuan University
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Abstract

The invention discloses an electrowetting-effect-based two-path liquid optical switch, which comprises an upper substrate, a transparent hard cavity body, a lower substrate, a light screen, a dielectric layer, an indium tin oxide (ITO) electrode I, an ITO electrode II, an ITO electrode III, colored droplets and light through holes, wherein colorless transparent liquid is filled in the transparent hard cavity body; the three ITO electrodes are embedded into the lower substrate at equal intervals, and the intervals between them are the same, the ITO electrode II is grounded; the two light through holes with the same diameter are symmetrically distributed in the center of the light screen; and the colored droplets are conductive, and the colorless transparent liquid is nonconductive. According to the liquid optical switch, two paths of light can be transmitted and blocked, and a gravity effect can be effectively overcome.

Description

A kind of two-path liquid optical switch based on the moistening effect of electricity
Technical field
The present invention relates to non-mechanical optical switch technology, more particularly, the present invention relates to a kind of two-path liquid optical switch technology based on the moistening effect of electricity.
Background technology
Photoswitch is a kind of switch light signal being played to on-off action in optical fiber or waveguide light path, and it has tempting application prospect in fields such as long haul optical communications, Fibre Optical Sensor, optical-fiber network and information displaying.Meanwhile, photoswitch can also as the component of the devices such as optical attenuator, adjustable light valve and spatial modulator.Wherein, liquid light switch device has miniaturization, makes the advantages such as simple and low energy consumption because inside does not need to introduce moveable solid state components parts.Liquid light switch is divided into mechanical type and non-mechanical two kinds.Mechanical type liquid light switch needs additional drive unit, and its device is complicated, power consumption is high.The device response time itself depends on the natural frequency of extraneous drive unit, and thus the Modulatory character of device is poor, the response time is slow.Non-mechanical optical switch is generally realize based on the moistening effect of electricity and dielectric stress effect.Based on although the liquid light switch response time of dielectric stress effect is fast, operating voltage is low, because dielectric power itself is fainter, so less based on the liquid light switch size of dielectric stress effect, seriously limit its range of application.The existing liquid light switch based on dielectric stress effect, its light is opened with the light intensity ratio under the two states of light pass within 100:1, and device performance need to promote.Current liquid light switch can only realize the break-make of single channel light source, be difficult to meet that in field of optical networks light exchanges, the requirement of wavelength chooses and full photosphere time Route Selection, liquid light switch also has a fatal shortcoming to be exactly the gravitational effect that cannot overcome internal liquid simultaneously.When liquid device is vertically placed, due to the gravitational effect of internal liquid, can device be made to lead to light uneven, good switching effect cannot be reached, thus cannot normally work.
Summary of the invention
The present invention proposes a kind of two-path liquid optical switch based on the moistening effect of electricity.As shown in Figure 1, this photoswitch comprises upper substrate, clear hard cavity, infrabasal plate, shadow shield, dielectric layer, ITO electrode , ITO electrode , ITO electrode , chromonic and light hole, wherein fill colourless transparent liquid in clear hard cavity, three pieces of ITO electrode are embedded in infrabasal plate, and interval is identical between two, ITO electrode ground connection, shadow shield Central Symmetry is distributed with the identical light hole of two diameters.Chromonic conduction wherein, colourless transparent liquid is non-conductive.
As shown in Figure 1, liquid device is original state, and chromonic is positioned at infrabasal plate center, and two light holes are not hidden by chromonic, and now liquid device is in two-way light open state.Respectively in ITO electrode and ITO electrode upper alternately making alive v, due to the moistening effect of electricity, chromonic can on infrabasal plate back and forth movement, when chromonic move to side the light hole of this side is hidden time, opposite side light hole still can lead to light.Therefore the on-off function of two-way light can be realized by the position controlling chromonic.Accompanying drawing 2 is respectively in ITO electrode and ITO electrode upper alternately making alive vtime, the vertical view of chromonic back and forth movement on infrabasal plate.
Preferably, clear hard cavity is long d 1>=10mm and d 1≤ 12mm, wide d 2>=6mm and d 2≤ 8mm is high d 3>=6mm and d 3≤ 8mm.
Preferably, ITO electrode and ITO electrode measure-alike, long d 4>= d 2and d 4≤ 9mm, wide d 5>=3.5mm and d 5≤ 5mm, ITO electrode long d 6>= d 2and d 6≤ 9mm, wide d 7>=1.5mm and d 7≤ 2mm, three cube electrodes are spaced apart between two d 8>=0.25mm and d 8≤ 0.5mm.
Preferably, chromonic diameter d 9>=3mm and d 9≤ 5mm.
Preferably, shadow shield is long d 10>=12mm and d 10≤ 15mm, wide d 11>=8mm and d 11≤ 10mm, shadow shield Central Symmetry two light hole diameters are d 12>=1mm and d 12≤ 1.5mm.The spacing in two light hole centers of circle d 13>= d 9+ d 12and d 13≤ 2 d- d 12, wherein dfor the maximum displacement of chromonic movement on infrabasal plate.
Preferably, in clear hard cavity, colourless transparent liquid is identical with the density of chromonic.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the two-path liquid optical switch based on the moistening effect of electricity.
Accompanying drawing 2 is in ITO electrode and ITO electrode alternately during making alive, the vertical view of chromonic back and forth movement on infrabasal plate.
Accompanying drawing 3 is in ITO electrode in embodiment and ITO electrode alternately during making alive, the schematic diagram of chromonic moving displacement on infrabasal plate.
Shown by reference numeral in above-mentioned each accompanying drawing is:
1 upper substrate, 2 clear hard cavitys, 3 infrabasal plates, 4 shadow shields, 5 dielectric layers, 6 ITO electrode , 7 ITO electrode , 8 ITO electrode , 9 light holes, 10 chromonic, 11 colourless transparent liquids.
Should be appreciated that above-mentioned accompanying drawing just schematically, do not draw in proportion.
Embodiment
The following detailed description of the embodiment of a kind of two-path liquid optical switch based on the moistening effect of electricity that the present invention proposes, the present invention is conducted further description.What be necessary to herein means out is; following examples are only described further for the present invention; limiting the scope of the invention can not be interpreted as; this art skilled person makes some nonessential improvement and adjustment according to foregoing invention content to the present invention, still belongs to protection scope of the present invention.
One embodiment of the present of invention are, upper substrate and infrabasal plate are 10mm × 8mm PMMA(polymethylmethacrylate) material makes, clear hard cavity is 10mm × 8mm × 8mm PMMA(polymethylmethacrylate) material makes.ITO electrode and ITO electrode size is 8mm × 3.5mm, ITO electrode be of a size of 8mm × 2mm, three cube electrodes are spaced apart 0.5mm between two.Shadow shield is of a size of 10mm × 8mm, and its centrosymmetric two light hole diameters are 1.0mm, and two light hole distance of center circle are from 5.5mm.Chromonic is that ink adds sodium chloride solution and mixes according to a certain percentage, and density is 1.25 g/cm 3, chromonic diameter is 4mm.The colourless transparent liquid of filling in clear hard cavity is optical liquid SL-5267, and density is 1.26 g/cm 3.As shown in Figure 1, during original state, chromonic is positioned at infrabasal plate center, and now two light holes are all in light open state.ITO electrode ground connection, to ITO electrode impressed voltage, due to the moistening effect of electricity, chromonic can to ITO electrode direction is moved, and right side light hole is covered by chromonic, cannot lead to light, and left side light hole still can lead to light; In like manner give ITO electrode impressed voltage, chromonic is to ITO electrode direction is moved, and left side light hole is covered by chromonic, cannot lead to light, and right side light hole recovers logical light.The vertical view of chromonic back and forth movement on infrabasal plate as shown in Figure 2.
Accompanying drawing 3 be in embodiment impressed voltage in ITO electrode and ITO electrode time chromonic movement on infrabasal plate displacement diagram.As shown in Figure 3, in embodiment, the maximum displacement that move to left side of chromonic on infrabasal plate is 3.2mm, and the maximum displacement moving to right side is 3.6mm.Chromonic alternately can cover two light holes, realizes the function of two-way photoswitch.According to parameter set in the present embodiment, the optical attenuation ability of this photoswitch is 1dB ~ 30dB, and light transmission loss is 0.67dB, and the response time is 177ms.

Claims (2)

1. based on a two-path liquid optical switch for the moistening effect of electricity, comprising: upper substrate, clear hard cavity, infrabasal plate, shadow shield, dielectric layer, ITO electrode , ITO electrode , ITO electrode , chromonic, light hole, it is characterized in that, fill colourless transparent liquid in clear hard cavity, three pieces of ITO electrode are from left to right embedded in infrabasal plate successively, and interval is identical between two, ITO electrode ground connection, shadow shield Central Symmetry is distributed with the identical light hole of two diameters, and chromonic conducts electricity, and colourless transparent liquid is non-conductive, and clear hard cavity is long d 1>=10mm and d 1≤ 12mm, wide d 2>=6mm and d 2≤ 8mm is high d 3>=6mm and d 3≤ 8mm.
2. a kind of two-path liquid optical switch based on the moistening effect of electricity according to claim 1, it is characterized in that, in clear hard cavity, colourless transparent liquid is identical with the density of chromonic.
CN201310104146.6A 2013-03-28 2013-03-28 Electrowetting-effect-based two-path liquid optical switch Active CN103149680B (en)

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CN103901607B (en) * 2014-04-02 2016-01-27 四川大学 A kind of variable unthreaded hole liquid light switch based on the moistening effect of electricity
CN104570330B (en) * 2015-01-14 2017-03-22 四川大学 Total reflection liquid optical switch based on electrowetting effect
CN105159045B (en) * 2015-08-14 2017-08-11 四川大学 A kind of holographic projection system based on adjustable diaphragm
CN111308692B (en) * 2020-03-04 2021-06-15 北京航空航天大学 Liquid optical switch capable of adaptively switching visible light and infrared light

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Publication number Priority date Publication date Assignee Title
CN102576096A (en) * 2009-10-06 2012-07-11 皇家飞利浦电子股份有限公司 Electrowetting device

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GB0720484D0 (en) * 2007-10-19 2007-11-28 Seereal Technologies Sa Cells
KR20110019613A (en) * 2009-08-20 2011-02-28 고려대학교 산학협력단 Electrowetting device for improving electrowetting efficiency

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102576096A (en) * 2009-10-06 2012-07-11 皇家飞利浦电子股份有限公司 Electrowetting device

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