CN114815221B - Liquid optical phase modulator with configurable adjustment range and precision - Google Patents
Liquid optical phase modulator with configurable adjustment range and precision Download PDFInfo
- Publication number
- CN114815221B CN114815221B CN202210223560.8A CN202210223560A CN114815221B CN 114815221 B CN114815221 B CN 114815221B CN 202210223560 A CN202210223560 A CN 202210223560A CN 114815221 B CN114815221 B CN 114815221B
- Authority
- CN
- China
- Prior art keywords
- liquid
- cavity
- cover plate
- inner core
- phase
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/06—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention relates to a liquid optical phase modulator with configurable adjustment range and precision, which comprises a solid inner core cavity, a transparent upper cover plate and a transparent lower cover plate, wherein the solid inner core cavity is sealed by the parallel transparent upper cover plate and lower cover plate to form a phase adjustment liquid cavity, three liquids are stored in the phase adjustment liquid cavity to serve as phase adjustment liquids, the inner cavity surface of the solid inner core cavity corresponding to each phase adjustment liquid is provided with a liquid injection hole, the liquid injection hole is connected with an external force adjusting device, the external force adjusting device is used for changing the height ratio of the liquid in the solid inner core cavity in the light passing direction, so that the optical path of a light beam when passing through the liquid is changed, the optical phase adjustment is realized, and the adjustment range and the adjustment precision are configurable by configuring the refractive index difference of the liquid in the solid inner core cavity. The invention constructs the horizontal liquid level by utilizing the property of unchanged contact angle, does not need to be externally added with a film, has simple structure and high precision, and has application prospect in the fields of optical synthetic aperture imaging and optical information processing.
Description
Technical Field
The invention relates to an optical phase modulation method, belongs to the technical field of optical imaging and optical information processing devices, and in particular relates to a liquid optical phase modulator which has wide adjustment range and freely configurable adjustment precision.
Background
The optical phase modulation technology has very wide application in the fields of optical communication, optical signal processing, optical device integration, microwave signal processing, optical imaging and the like. Currently, the dominant techniques of optical phase modulation are phase modulation techniques based on waveguide electro-optic modulation and phase modulation techniques based on mechanical modulation. The phase modulation technology based on waveguide electro-optic modulation utilizes the electro-optic effect of the medium to change the mode in the waveguide, thereby changing the phase of the output light and achieving the purpose of phase modulation. Phase modulation based on mechanical modulation is phase modulation by mechanical means, typically micro-electromechanical system phase modulators and piezo-ceramic based fiber optic phase modulators.
Liquid optical phase modulator based on piezoelectric ceramics utilizes piezoelectric effect of piezoelectric ceramics: some dielectrics, when deformed by external forces in a certain direction, have polarization inside them, while having opposite charges on opposite surfaces. When the external force is removed, it returns to an uncharged state, a phenomenon known as the positive piezoelectric effect. When the direction of the force changes, the polarity of the charge changes. Conversely, when an electric field is applied in the polarization direction of the dielectrics, these dielectrics are deformed, and after the electric field is removed, the deformation of the dielectrics is eliminated, and this phenomenon is called the inverse piezoelectric effect. Therefore, the piezoelectric ceramic is deformed by applying voltage to the piezoelectric ceramic, the optical path is changed, and the optical path difference is changed, so that the phase modulation purpose is realized. However, piezoelectric ceramic phase modulators suffer from a number of disadvantages:
(1) the deformation of the piezoelectric ceramic under the action of an electric field is very small and is not more than one ten million times of the size of the piezoelectric ceramic, so that the optical path difference change of the liquid optical phase modulator based on the piezoelectric ceramic is small and the phase adjustment range is small;
(2) the liquid optical phase modulator based on piezoelectric ceramics has complex structure and complex operation;
(3) the piezoelectric ceramics have higher energy consumption.
Disclosure of Invention
Based on the defects of the traditional phase modulator, the invention provides the liquid optical phase modulator which is simple to operate, low in energy consumption, adjustable in adjusting range and precision, and the optical phase modulator is simple to operate, low in cost, large in range, high in precision and low in energy consumption, and solves the problems of complex structure, low precision of a high-cost phase modulation range in the prior art.
In order to solve the problems, the invention is realized by the following technical scheme:
the invention relates to a liquid optical phase modulator with configurable adjustment range and precision, which comprises a solid inner core cavity and a transparent upper coverThe solid inner core cavity is sealed to be the phase place regulation liquid chamber by parallel transparent upper cover plate and transparent lower cover plate, and three kinds of liquid are stored in the phase place regulation liquid chamber as phase place regulation liquid, wherein: the included angle between the inner cavity surface of the solid inner core cavity and the lower bottom surface of the transparent upper cover plate is alpha 1 The contact angle in the lower layer liquid at the three-phase contact point formed by the first layer liquid, the second layer liquid and the inner cavity surface from top to bottom in the phase adjusting liquid cavity is theta 1 ，α 1 Equal to theta 1 So as to realize that the contact interface of two liquids is parallel to the lower bottom surface of the transparent upper cover plate, and the included angle between the inner cavity surface of the solid inner core cavity and the upper bottom surface of the transparent lower cover plate is alpha 2 The contact angle in the upper layer liquid at the three-phase contact point formed by the surface of the inner cavity and the second layer liquid and the third layer liquid from top to bottom in the phase adjusting liquid cavity is theta 2 ，α 2 Equal to theta 2 The liquid contact interface is parallel to the upper bottom surface of the lower cover plate and the upper bottom surface of the transparent lower cover plate, and a first coating layer and a second coating layer are respectively coated on the inner side of the cavity of the solid inner core to set a contact angle theta 1 And contact angle theta 2 。
The inner cavity surface of the solid inner core cavity corresponding to each phase adjusting liquid is provided with a liquid injection hole, the liquid injection hole is connected with an external force adjusting device, the external force adjusting device is used for changing the height ratio of liquid in the solid inner core cavity in the light passing direction, so that the optical path of a light beam when the light beam passes through the liquid is changed, the optical phase adjustment is realized, and the adjustment range and the adjustment precision are configurable by configuring the refractive index difference of the liquid in the solid inner core cavity.
The invention further improves that: the phase adjusting liquid cavity can store two or more than four kinds of liquid, when the three kinds of phase adjusting liquid are stored, the three kinds of phase adjusting liquid are different, and the two adjacent phase adjusting liquids have refractive index differences and are mutually insoluble, and the refractive index differences delta n of the first layer and the liquid in the phase adjusting liquid and the second layer in the three kinds of phase adjusting liquid 12 Is configurable, has larger value, large optical path difference and large liquid level moving unit distance, thereby realizing a large-scale phaseBit modulation, refractive index difference Deltan of second layer liquid and third layer liquid 23 The liquid level can be configured to have a small value and a small optical path difference, and the liquid level is moved by a unit distance, so that high-precision phase adjustment is realized. The two liquid levels can be always kept parallel, and the parallel light waves are still parallel light after coming out when passing through the device along the axial direction of the phase modulator cavity. When two kinds of phase adjustment liquids are stored, one of the three liquids can be replaced by the same liquid as the other two liquids, so that the phase adjustment liquid cavity can store the two liquids,
when the solid core cavity of the present invention stores three liquids, the inner cavity surface of the solid core cavity may take several forms:
1. the inner core cavity of the solid body is formed by splicing two round tables up and down, and the surface of the inner cavity is formed.
2. The inner core cavity of the solid body is provided with an inner cavity surface formed by splicing two prismatic tables formed by splicing isosceles trapezoid surfaces up and down.
3. The solid inner core cavity is provided with a prismatic table formed by splicing a round table and an isosceles trapezoid surface, and the prismatic table is spliced up and down to form an inner cavity surface.
When two liquids in three phase adjusting liquids stored in the phase adjusting liquid cavity are the same, a conductive layer and an insulating layer are added on the inner surfaces of the solid inner core cavity and the upper and lower transparent cover plates, and after the electric conduction, the liquid generates an electrowetting effect and a dielectrophoresis effect, and the radian of the liquid level is finely adjusted.
The liquid optical phase modulator with configurable adjustment range and precision has a working limit that the lower interface of liquid 1 reaches the splicing interface and the upper interface of liquid 3 reaches the splicing interface. Exceeding the operating limit exceeds the operating range of the phase modulator. The liquid optical phase modulator with configurable adjusting range and precision has larger refractive index difference between liquid 1 and liquid 2, and the liquid level 1 can adjust larger optical path difference per unit distance of movement, thus realizing larger phase modulation range; the refractive index difference between the liquid 2 and the liquid 3 is small, the change range of the optical path difference is small and the phase adjustment is small every unit distance of the movement of the liquid surface 2, and the phase adjustment with high precision can be realized.
The invention further improves that: when three types of liquid are in the liquid optical phase modulator, corresponding liquid injection holes are reserved on the side wall of the circular truncated cone; the height ratio of the three liquids in the light passing direction is changed by using external driving through the three liquid injection holes, so that the optical path of the light beam passing through the three liquids is changed, and the optical phase adjustment is realized; meanwhile, the refractive index difference between the liquid 1 and the liquid 2 and the refractive index difference between the liquid 2 and the liquid 3 can be configured, the refractive index difference between the liquid 1 and the liquid 2 is larger, and the phase modulation in a larger range can be realized; the refractive index difference between the liquid 2 and the liquid 3 is small, and high-precision adjustment precision configuration can be realized.
The beneficial effects of the invention are as follows:
the change range of the liquid interface can be from the bottom of the device to the top of the device, and the adjustment range is wide;
the optical path difference of the invention is delta= (|n) 1 -n 2 |)*Δh 1 +(|n 3 -n 2 |)*Δh 2 Wherein |n 1 -n 2 |、|n 3 -n 2 I is the absolute value Δn of the refractive index difference of liquid 1, liquid 2 and liquid 2, liquid 3, respectively 12 And Deltan 32 Wherein Δn 12 The value is larger, delta n 32 The value is smaller, the phase modulation in a larger range can be realized by changing the height ratio of the liquid 1 and the liquid 2 in the light transmission direction, and the phase modulation with higher precision can be realized by changing the height ratio of the liquid 3 and the liquid 2 in the light transmission direction;
according to the invention, different liquids are adopted to enable the refractive index difference to be different, so that the adjustable range and the configurable precision are realized;
when the phase adjusting liquid is only two, the liquid levels are natural liquid levels, no external drive is needed, and the operation is simple;
the liquid optical phase modulator has simple structure and convenient operation.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a block diagram of the initial optical path of the present invention.
Fig. 3 is a structural diagram of the optical path difference in the light passing direction of the present invention.
Fig. 4 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 5 is a cross-sectional view of a first embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 7 is a side view of a second embodiment of the present invention.
Fig. 8 is a schematic structural view of a third embodiment of the present invention.
Fig. 9 is a side view of a third embodiment of the invention.
Fig. 10 is a schematic structural view of a fourth embodiment of the present invention.
Fig. 11 is a schematic structural diagram of a fifth embodiment of the present invention.
Fig. 12 is a schematic structural diagram of a sixth embodiment of the present invention.
Detailed Description
Embodiments of the invention are disclosed in the drawings, and for purposes of explanation, numerous practical details are set forth in the following description. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.
As shown in fig. 1-3, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the solid inner core cavity 1 has a complex inner cavity surface, the solid inner core cavity 1 is sealed by the parallel transparent upper cover plate 2 and the transparent lower cover plate 3 into a phase adjustment liquid cavity, three liquids are stored in the phase adjustment liquid cavity as phase adjustment liquid, and the included angle between the inner cavity surface of the solid inner core cavity 1 and the lower bottom surface of the transparent upper cover plate 2 is alpha 1 The contact angle in the lower layer liquid at the three-phase contact point formed by the first layer liquid, the second layer liquid and the inner cavity surface from top to bottom in the phase adjusting liquid cavity is theta 1 ，α 1 Equal to theta 1 So as to realize that the two liquid contact interfaces are parallel to the lower bottom surface of the transparent upper cover plate 2; the inner part of the core cavity 1 in the solid bodyThe included angle between the cavity surface and the upper bottom surface of the transparent lower cover plate 3 is alpha 2 The contact angle in the upper layer liquid at the three-phase contact point formed by the surface of the inner cavity and the second layer liquid and the third layer liquid from top to bottom in the phase adjusting liquid cavity is theta 2 ，α 2 Equal to theta 2 So as to achieve a liquid-contacting interface parallel to the upper bottom surface of the lower cover sheet 3 and the transparent lower cover sheet 3.
When three kinds of phase adjustment liquids are different, a liquid 6, a liquid 7 and a liquid 8 are arranged, liquid injection holes are respectively arranged on the inner cavity surface of the solid inner core cavity 1 corresponding to each phase adjustment liquid, as shown in fig. 1, the liquid injection holes are a first liquid injection hole 9, a second liquid injection hole 10 and a third liquid injection hole 11 from top to bottom, and a first coating layer 12 and a second coating layer 13 are respectively coated on the inner side of the solid inner core cavity 1 to set a contact angle theta 1 And contact angle theta 2 . The liquid injection hole is connected with an external force adjusting device, the external force adjusting device is used for changing the height ratio of the liquid in the solid inner core cavity 1 in the light passing direction, so that the optical path length of the light beam passing through the liquid is changed, the optical phase adjustment is realized, and the adjustment range and the adjustment precision can be configured by configuring the refractive index difference of the liquid in the solid inner core cavity 1. When the liquid in the liquid optical phase modulator is three, the refractive indexes of the liquid 1, the liquid 2 and the liquid 3 are respectively n 1 、n 2 、n 3 The cavity height is 3s, and the middle is a splicing interface. It is assumed that initially the two liquid levels will equally divide the chamber, i.e. the heights of liquid 1, liquid 2, liquid 3 are all s, as in fig. 2. Initial optical path
l 1 ＝n 1 *s+n 2 *s+n 3 *s
After external driving, the interface between the liquid 1 and the liquid 2 is moved down by delta h 1 The interface between liquid 2 and liquid 3 increases by Δh 2 As shown in FIG. 3, the height of the liquid 1 is s+Δh 1 The height of the liquid 2 is s-Deltah 1 -Δh 2 The height of the liquid 3 is s+Δh 2 The optical path is
l 2 ＝n 1 (s+Δh 1 )+n 2 (s-Δh 1 -Δh 2 )+n 3 (s+Δh 2 )
Optical path difference of
Δ＝(|n 1 -n 2 |)*Δh 1 +(|n 3 -n 2 |)*Δh 2
Wherein |n 1 -n 2 |、|n 3 -n 2 I is the absolute value Δn of the refractive index difference of liquid 1, liquid 2 and liquid 2, liquid 3, respectively 12 And Deltan 32 Wherein Δn 12 The value is larger, delta n 32 The value is small, the phase modulation in a large range can be realized by changing the height ratio of the liquid 1 and the liquid 2 in the light transmission direction, and the phase modulation with higher precision can be realized by changing the height ratio of the liquid 3 and the liquid 2 in the light transmission direction. Δn 12 And Deltan 32 The size of the adjustable power supply system can realize that the adjustment range and the precision are configurable.
The optical path difference of the liquid optical phase modulator in the light passing direction under the external driving is that
(|n 1 -n 2 |)*Δh 1 +(|n 3 -n 2 |)*Δh 2
The relationship between the optical path difference and the phase difference is:
wherein the method comprises the steps of
Is a phase difference; delta is the optical path difference; lambda is the wavelength of the light. The phase adjustment is achieved by varying the optical path difference. The upper interface of the liquid 2 can be adjusted from the splicing interface to the top, and the lower interface can be adjusted from the splicing interface to the bottom, namely the maximum value of the optical path difference can be reached
Far longer than the wavelength of working light, and wide adjustment range.
Example 1
As shown in fig. 4-5, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the upper and lower transparent cover plates are transparent acrylic glass plates, two circular truncated cone side walls formed by rotating straight lines as buses are spliced up and down to form the solid inner core cavity, and the solid inner core cavity can be formed by using quartz sand, limestone, feldspar, sodium carbonate, boric acid and other glass raw materials through high temperature. And defining the splicing position of the upper round table and the lower round table as a splicing interface. The side walls of the circular truncated cone are manufactured separately by taking the splicing interface as a boundary. After the upper half is manufactured, the inner wall of the inner core cavity of the solid body is coated with a Teflon hydrophobic layer 12, and the included angle between a bus and the bottom surface is equal to the contact angles of the liquid 1, the liquid 2 and the Teflon coating layer 12. The lower half part is also made of glass in a customized mode, and the upper edge of the lower half part and the lower edge of the upper half part are completely overlapped. The inner wall is coated with a Teflon hydrophobic layer 13 whose generatrix and bottom surface have an angle equal to the contact angle of the liquid 2, liquid 3 and Teflon coating. After the two parts are manufactured, the two parts are spliced together along the splicing part to form a complete whole. The lithium chloride solution, silicone oil and water are sequentially injected from bottom to top. The upper part, the lower part and the splicing interface are respectively provided with a corresponding liquid injection hole for the flow of liquid so as to adjust the height ratio of the liquid in the light transmission direction. The outer side of the solid inner core cavity 1 is provided with an external force adjusting device, the external force adjusting device comprises a side wall formed by rotating the outer side of the solid inner core cavity 1, three liquid storage tanks are separated between the two walls by a hard plate, a magnet 14-1 is additionally arranged on the upper side and the lower side of the side wall in the liquid storage tanks, and a conductive coil 15-1 is additionally arranged on the magnet. After the power is on, the side wall is extruded by the interaction force of the magnetic field between the magnet and the conductive coil to push the liquid level to move, so that the optical path is changed to realize phase adjustment.
Example two
As shown in figures 6-7, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, and the solid inner core cavity adopts two prismatic tables formed by splicing isosceles trapezoid surfacesThe side walls are spliced up and down, as shown in fig. 6, the cavity of the solid inner core is made of PLA material through 3D printing, drawing software such as CAD is used for drawing, and a 3D printer is used for printing out a finished product. An included angle alpha between the isosceles trapezoid surface side wall of the upper frustum side wall formed by splicing isosceles trapezoid surfaces and the top surface of the frustum side wall 1 Equal to the contact angle theta of the liquid 1-liquid 2-land side wall 1 1 To ensure that the contact interface of the liquid 1 and the liquid 2 is a plane; isosceles trapezoid surface side wall of lower terrace with edge side wall bottom surface contained angle alpha 2 Equal to the contact angle theta of the liquid 2-liquid 3-land sidewall 2 2 To ensure that the contact interface of the liquid 2 and the liquid 3 is plane. A side view is shown in fig. 7. The liquid is bromododecane, water and phenyl silicone oil respectively. The inner wall of the cavity of the solid inner core is coated with a polyolefin hydrophobic layer to play a role in improving the contact angle through hydrophobic modification. The upper and lower parts are sealed by transparent acrylic glass cover plates, a liquid injection hole is reserved at the upper and lower parts of the solid inner core main body and at the splicing interface, the liquid injection holes are respectively connected with a corresponding liquid pump for filling and absorbing so as to facilitate the circulation of liquid, and the height ratio of the liquid in the light-passing direction is regulated so as to regulate the phase.
Example III
As shown in fig. 8-9, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the solid inner core cavity 1 is formed by splicing the side wall of a truncated cone with the side wall of an isosceles trapezoid, the upper and lower parts of the solid inner core cavity 1 are respectively manufactured by 3D printing PLA material, and the solid inner core cavity 1 is tightly adhered together by Kai mi 540AB glue. The inner wall of the core cavity 1 in the solid body is coated with a polyolefin hydrophobic layer to play a role in improving the contact angle through hydrophobic modification. Included angle alpha between truncated cone side wall of upper half part of core cavity in solid and truncated cone top surface 1 Equal to the contact angle theta of the side wall of the liquid 1-liquid 2-round platform 1 To ensure that the contact interface of the liquid 1 and the liquid 2 is a plane; isosceles trapezoid surface side wall of prismatic table formed by splicing isosceles trapezoid surfaces at lower half part of core cavity in solid body and included angle alpha of bottom surface of prismatic table 2 Equal to the contact angle theta of the side wall of the liquid 2-liquid 3-prismatic table 2 To ensure that the contact interface of the liquid 2 and the liquid 3 is plane. As shown in the side view of 9, the upper and lower parts of the solid inner core cavity 1 are sealed by transparent glass cover plates, and a liquid injection hole is reserved at the upper and lower parts of the solid inner core main body and at the splicing interface so as to facilitate the circulation of liquid and adjust the height ratio of the liquid in the light-passing direction. The three liquids are respectively silicone oil, water and bromododecane. The outer wall of the liquid storage cavity is provided with an elastic membrane so as to adjust the outer cavity to change the liquid volume of the inner cavity. So as to facilitate the circulation of liquid and adjust the height ratio of the liquid in the light-passing direction so as to adjust the phase.
Example IV
As shown in fig. 10, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the side wall of a round table formed by rotating a straight line as a bus is used as the solid inner core cavity 1, the inner wall of the solid inner core cavity is coated with a Teflon hydrophobic coating layer to improve the contact angle, and the round table is sealed between the upper transparent glass cover plate 2 and the lower transparent cover plate 3. The side walls are made of slightly soft plastic through fusion casting. The liquid injection hole 9-1 is reserved between the round table and the transparent upper cover plate 2, the liquid injection hole 11-1 is reserved between the round table and the transparent lower cover plate, and the liquid injection hole 9-1 and the liquid injection hole 11-1 are used for flowing liquid so as to adjust the volume ratio of the liquid, namely the height ratio of the liquid in the light passing direction. The outer side of the core cavity 1 in the solid body is surrounded by a side wall formed by rotation, two liquid storage tanks are formed between the two walls by a hard plate partition 16, and water 6-4 and silicone oil 7-4 are filled in the liquid storage tanks. A magnet 14-4 is additionally arranged on the outer side of the inner side wall, a conductive coil 15-4 is additionally arranged on the magnet, after the coil is electrified, the side wall is extruded by the interaction force of magnetic fields between the magnet and the conductive coil to push the liquid level 17 to move, and the height difference of the liquid in the light-passing direction is changed, so that the phase is adjusted.
Example five
As shown in FIG. 11, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the structure is as shown in FIG. 11, a round table-shaped conductive electrode formed by rotating a straight line as a bus is used as the solid inner core cavity, conductive copper is used for forming the side wall electrode 2-1 solid inner core cavity through melting and pouring, and the inner wall of the electrode is coated with an insulating layer 3-1 and a hydrophobic layer 4. The round table is sealed between the upper and lower transparent conductive electrodes 5 and the upper and lower transparent glass cover plates 1. The upper transparent conductive electrode 5 and the lower transparent conductive electrode 5 are separated from the side wall of the conductive round table through a first insulating layer 3-1, liquid in the phase adjusting liquid cavity is separated from the transparent conductive electrode 5 through a second insulating layer 6, and water and silicone oil are filled in the liquid. The outer wall of the liquid storage cavity is an elastic film so as to adjust the outer cavity to change the liquid volume of the inner cavity. So as to facilitate the circulation of liquid and adjust the height ratio of the liquid in the light-passing direction so as to adjust the phase. The application of the voltage U between the bottom transparent electrode 5 and the side wall electrode 2-1 can generate an electrowetting effect between the two liquids, and the curvature of the curved surface is finely adjusted through the electrowetting effect to adjust the liquid level. The upper and lower transparent conductive electrodes are separated from the liquid by a second insulating layer 6.
Example six
As shown in fig. 12, the invention is a liquid optical phase modulator with configurable adjustment range and precision, the liquid optical phase modulator comprises a solid inner core cavity 1, a transparent upper cover plate 2 and a transparent lower cover plate 3, wherein the transparent upper cover plate 2 and the transparent lower cover plate 3 are arranged in parallel, the structure is as shown in fig. 12, a round table-shaped conductive electrode which is formed by taking a straight line as a bus bar to rotate is used as the solid inner core cavity, conductive copper is used for being poured into the solid inner core cavity of the side wall electrode 2-1 through melting, a round table-shaped conductive electrode which is formed by taking the straight line as the bus bar to rotate is used as the solid inner core cavity, conductive copper is used for being poured into the solid inner core cavity of the side wall electrode 2-1 through melting, and the inner wall of the electrode is coated with an insulating layer 3-1 and a hydrophobic layer 4. The round table is sealed between the upper and lower transparent conductive electrodes 5 and the upper and lower transparent glass cover plates 2. The upper and lower electrodes and the sidewall electrode are separated by a first insulating layer 3-1. The phenyl silicone oil and the ethylene glycol are filled in the water-soluble polyurethane foam. The outer wall of the liquid storage cavity is connected with a liquid pump for filling and absorbing liquid, so that the outer cavity is convenient to adjust and change the liquid volume of the inner cavity. So as to facilitate the circulation of liquid and adjust the height ratio of the liquid in the light-passing direction so as to adjust the phase. The voltage U is applied to the bottom transparent electrode 5 and the side wall electrode 2-1 to generate dielectrophoresis effect between the two liquids, and the curvature of the curved surface is finely adjusted through the dielectrophoresis effect to adjust the liquid level.
The liquid optical phase modulator comprises a solid inner core cavity with a special shape and an internal phase adjusting liquid, wherein the phase modulator changes an adjusting phase when the optical path is transmitted in the direction of the optical cavity under the adjustment of external driving. The invention constructs the horizontal liquid level by utilizing the property of unchanged contact angle, does not need to be externally added with a film, has simple structure and high precision, and has application prospect in the fields of optical synthetic aperture imaging and optical information processing.
The foregoing description is only illustrative of the invention and is not to be construed as limiting the invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present invention, should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a liquid optical phase modulator that accommodation and precision are all configurable, liquid optical phase modulator includes solid inner core cavity (1), transparent upper cover plate (2) and transparent lower cover plate (3) parallel arrangement, its characterized in that: the solid inner core cavity (1) is provided with a complex inner cavity surface, the solid inner core cavity (1) is sealed into a phase adjustment liquid cavity by the parallel transparent upper cover plate (2) and the transparent lower cover plate (3), three liquids are stored in the phase adjustment liquid cavity to serve as phase adjustment liquid, and the phase adjustment liquid comprises the following components:
the included angle between the inner cavity surface of the inner core cavity (1) of the solid body and the lower bottom surface of the transparent upper cover plate (2) is alpha 1 The three-phase contact point is formed by the surfaces of the first layer of liquid, the second layer of liquid and the inner cavity from top to bottom in the phase adjusting liquid cavityContact angle θ in underlying liquid 1 ，α 1 Equal to theta 1 So as to realize that the two liquid contact interfaces are parallel to the lower bottom surface of the transparent upper cover plate (2);
the included angle between the inner cavity surface of the inner core cavity (1) of the solid body and the upper bottom surface of the transparent lower cover plate (3) is alpha 2 The contact angle in the upper layer liquid at the three-phase contact point formed by the surface of the inner cavity and the second layer liquid and the third layer liquid from top to bottom in the phase adjusting liquid cavity is theta 2 ，α 2 Equal to theta 2 So as to realize that the liquid contact interface is parallel to the upper bottom surface of the lower cover sheet (3) and the upper bottom surface of the transparent lower cover sheet (3);
the inner cavity surface of the solid inner core cavity (1) corresponding to each phase adjusting liquid is provided with a liquid injection hole, the liquid injection hole is connected with an external force adjusting device, the external force adjusting device is utilized to change the height ratio of the liquid in the solid inner core cavity (1) in the light passing direction, so that the optical path of a light beam passing through the liquid is changed, the optical phase adjustment is realized, and the adjustment range and the adjustment precision can be configured by configuring the refractive index difference of the liquid in the solid inner core cavity (1).
2. A liquid optical phase modulator with configurable adjustment range and precision according to claim 1, characterized in that: the three phase adjusting liquids stored in the phase adjusting liquid cavity are different, and the two adjacent phase adjusting liquids have refractive index differences and are mutually insoluble.
3. A liquid optical phase modulator with configurable adjustment range and precision according to claim 2, characterized in that: the refractive index difference delta n between the first layer and the liquid in the three phase adjustment liquids and between the second layer liquid 12 Is configurable, the liquid level moves a unit distance, the optical path difference is large, and therefore the wide-range phase adjustment is realized, the refractive index difference delta n between the liquid of the second layer and the liquid of the third layer 23 Can be configured, the liquid level moves by a unit distance, and the optical path difference is small, thereby realizing high-precision phase adjustment.
4. A liquid optical phase modulator with configurable adjustment range and precision according to claim 3, characterized in that: the inner core cavity (1) of the solid is formed by splicing two round tables up and down, and the surface of the inner cavity is formed.
5. A liquid optical phase modulator with configurable adjustment range and precision according to claim 3, characterized in that: the inner core cavity (1) of the solid body is provided with an inner cavity surface formed by splicing two prismatic tables formed by splicing isosceles trapezoid surfaces up and down.
6. A liquid optical phase modulator with configurable adjustment range and precision according to claim 3, characterized in that: the inner core cavity (1) of the solid body is provided with a prismatic table formed by splicing a round table and an isosceles trapezoid surface, and the prismatic table is spliced up and down to form the inner cavity surface.
7. A liquid optical phase modulator configurable for both range and accuracy according to any of claims 4-6, wherein: the inner side of the core cavity (1) in the solid body is respectively coated with a first coating layer (12) and a second coating layer (13) to set a contact angle theta 1 And contact angle theta 2 。
8. A liquid optical phase modulator with configurable adjustment range and precision according to claim 1, characterized in that: two kinds of liquid in the three kinds of phase adjustment liquid stored in the phase adjustment liquid cavity are the same and two kinds of adjacent phase adjustment liquid have refractive index difference and are mutually insoluble.
9. The liquid optical phase modulator of claim 8, wherein the adjustment range and accuracy are configurable, wherein: transparent upper cover plate (2) with the inboard of transparent lower cover plate (3) all is provided with transparent conductive electrode (5), and the round platform seals between transparent conductive electrode (5) and the round platform lateral wall is conductive copper and forms through the melting pouring, upper and lower transparent conductive electrode (5) with conductive round platform lateral wall separates through first insulating layer (3-1), liquid in the phase place adjustment liquid intracavity with separate through second insulating layer (6) between transparent conductive electrode (5).
10. The liquid optical phase modulator of claim 8, wherein the adjustment range and accuracy are configurable, wherein: transparent upper cover plate (2) with the inboard of transparent lower cover plate (3) all is provided with transparent conductive electrode (5), and the round platform seals between transparent conductive electrode (5) and the round platform lateral wall is conductive copper and forms through the melting pouring, upper and lower transparent conductive electrode (5) with the round platform lateral wall of electric conduction separates through first insulating layer (3-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223560.8A CN114815221B (en) | 2022-03-07 | 2022-03-07 | Liquid optical phase modulator with configurable adjustment range and precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223560.8A CN114815221B (en) | 2022-03-07 | 2022-03-07 | Liquid optical phase modulator with configurable adjustment range and precision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114815221A CN114815221A (en) | 2022-07-29 |
| CN114815221B true CN114815221B (en) | 2023-07-14 |
Family
ID=82529785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210223560.8A Active CN114815221B (en) | 2022-03-07 | 2022-03-07 | Liquid optical phase modulator with configurable adjustment range and precision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114815221B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938608A (en) * | 2004-03-30 | 2007-03-28 | 皇家飞利浦电子股份有限公司 | Compact switchable optical unit |
| WO2009124935A1 (en) * | 2008-04-09 | 2009-10-15 | Seereal Technologies S.A. | Tunable optical array device comprising liquid cells |
| DE102011101323A1 (en) * | 2011-05-12 | 2012-11-15 | Osram Opto Semiconductors Gmbh | Optoelectronic component for use in e.g. projection application, has control device operating optical phase switch, where different optical path lengths are assigned for laser light for different modes of operation of optical phase switch |
| CN110045495A (en) * | 2019-05-06 | 2019-07-23 | 南京邮电大学 | A kind of optics phase modulation method based on liquid lens |
-
2022
- 2022-03-07 CN CN202210223560.8A patent/CN114815221B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1938608A (en) * | 2004-03-30 | 2007-03-28 | 皇家飞利浦电子股份有限公司 | Compact switchable optical unit |
| WO2009124935A1 (en) * | 2008-04-09 | 2009-10-15 | Seereal Technologies S.A. | Tunable optical array device comprising liquid cells |
| DE102011101323A1 (en) * | 2011-05-12 | 2012-11-15 | Osram Opto Semiconductors Gmbh | Optoelectronic component for use in e.g. projection application, has control device operating optical phase switch, where different optical path lengths are assigned for laser light for different modes of operation of optical phase switch |
| CN110045495A (en) * | 2019-05-06 | 2019-07-23 | 南京邮电大学 | A kind of optics phase modulation method based on liquid lens |
Non-Patent Citations (1)
| Title |
|---|
| 新颖的微流控光学变焦透镜阵列集成器件;梁忠诚;徐宁;涂兴华;陈陶;赵瑞;;光电工程(第09期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114815221A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Levy et al. | Tunable optofluidic devices | |
| JP4154858B2 (en) | Variable focus lens | |
| JP4967290B2 (en) | Optical element | |
| CN102466825A (en) | Electrowetting zoom lens based on ion liquid | |
| CN101490614A (en) | Lens array | |
| WO2005006029A1 (en) | Variable lens | |
| CN110045495B (en) | Optical phase modulation method based on liquid lens | |
| CN102103220A (en) | Varifocal lens of micro-fluid control liquid based on ionic liquid | |
| JP2007086451A5 (en) | ||
| US20160301921A1 (en) | Grating structure, display device and display mode switching method | |
| CN102866556A (en) | Liquid crystal zoom lens and zoom control method thereof | |
| CN101694543A (en) | Electric-control wide-angle light scanning device and array thereof | |
| JP2007057807A (en) | Optical element | |
| CN114815221B (en) | Liquid optical phase modulator with configurable adjustment range and precision | |
| CN105301679A (en) | Variable-optical axis liquid zoom lens based on electrowetting technology | |
| CN102096126A (en) | Ion liquid-based microfluidic varifocus lens | |
| CN101539639B (en) | Double-liquid varifocal lens with changeable optical axis | |
| CN113376720A (en) | Variable focus liquid lens with complex internal cavity surface | |
| CN202230221U (en) | Electric-tuning optical switch device | |
| CN102338895A (en) | Bifocus micro lens with aspheric surface and adjustable focal length | |
| CN105842760B (en) | A kind of the zoom microlens array structure and its preparation technology of electricity regulation and control | |
| CN108037550B (en) | A kind of reversion zoom lenticule of low voltage drive | |
| CN203101726U (en) | Electro-wetting piston type optical switch | |
| CN102053291A (en) | Liquid lens array and using method thereof | |
| CN107315246A (en) | A kind of photoswitch based on medium electrowetting effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |