KR20210077298A - Three-dimensional gel lens with variable focus - Google Patents

Abstract

A three-dimensional variable focus gel lens according to the present invention includes: a first electrode and a second electrode formed on a substrate and having different polarities; and a transmissive part formed of an electroactive polymer and the shape of which is deformed when a voltage is applied to the first electrode and the second electrode. At least one of the first electrode and the second electrode is formed more than one and individually applied with a voltage to three-dimensionally deform the shape of the transmissive part, so that the focal position of light passing through the transmissive portion is changed in three dimensions.

Description

Three-dimensional variable focus gel lens {THREE-DIMENSIONAL GEL LENS WITH VARIABLE FOCUS}

The present invention relates to a gel lens in which the curvature of a lens is variable based on an electrical signal, and more particularly, to a three-dimensionally variable focus gel lens according to an applied voltage.

In general, a lens is used in various electronic devices such as a camera, and is a device capable of focusing one or more wavelengths of light. Recently, development of a variable lens that can be used in miniaturized and multi-functional electronic devices is being made, and in order to adjust the focus of a photographed image, a method for adjusting the focus of an image by variably controlling the shape without changing the position of the lens are being studied Examples include a method of controlling the shape of a lens using hydraulic pressure, a method of controlling the shape of liquid crystal according to voltage application, and a method of controlling a liquid lens that can adjust the focal length in the optical axis direction using electrowetting phenomenon. .

However, since the method as described above has additional parts for shape control, it is difficult to achieve miniaturization, there is a limit in the lens focusing range, and the problem that it is not applicable to a multifocal lens array structure has been continuously raised. .

In particular, liquid lenses using the electrowetting phenomenon can only adjust the auto focus distance in the optical axis direction (Auto Focus, hereafter referred to as AF) and cannot move the focus in the horizontal direction in the optical axis direction, so optical image stabilization (hereinafter referred to as OIS) is not possible. ) was not possible.

The present invention is an invention devised to solve the problems of the prior art, and the present invention is a focus position of light passing through the transmission part by three-dimensionally deforming the shape of the transmission part according to the voltage applied to the transmission part formed of an electroactive polymer. It has an object to provide a gel lens variable in three dimensions.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A three-dimensional variable focus gel lens of the present invention for achieving the above object is formed on a substrate, the first electrode and the second electrode having different polarity; It is formed of an electroactive polymer, and includes a transmission part whose shape is deformed when a voltage is applied to the first electrode and the second electrode.

And at least one of the first electrode and the second electrode is formed in plurality and a voltage is applied individually to deform the shape of the transmission part in three dimensions, so that the focal position of the light passing through the transmission part is changed in three dimensions characterized.

In addition, the electrode formed as a plurality of the first electrode and the second electrode is characterized in that it is composed of a plurality of unit electrodes to which voltages are individually applied on the substrate.

And by blocking the electrical interference between the plurality of unit electrodes, it further includes a distortion preventing portion for preventing shape distortion of the transmission portion.

Here, the distortion prevention part is formed on the substrate such that the plurality of unit electrodes are spaced apart from each other at a predetermined interval.

In addition, the predetermined interval is characterized in that 50㎛ to 1000㎛.

And the transmitting part is disposed so that a part of the surface is exposed to the through hole formed in the substrate, and any one of the first electrode and the second electrode is composed of a plurality of unit electrodes and is disposed on the upper part of the substrate along the inner peripheral surface of the through hole. is provided, and the other one of the first electrode and the second electrode, which is not composed of a plurality of unit electrodes, is spaced apart from the inner circumferential surface of the through hole by a predetermined distance to surround the through hole and is provided under the substrate. characterized.

Here, the preset distance is a distance between the first electrode and the second electrode, and is set in response to a voltage in a preset range applied from the first electrode and the second electrode to the transmissive part.

In addition, the distortion prevention part is characterized in that it is formed between the plurality of unit electrodes so that the plurality of unit electrodes can be arranged at a predetermined interval.

Here, the predetermined distance is a distance between the plurality of unit electrodes, and is characterized in that it varies according to the diameter of the through hole.

By changing the shape of the transmission part in three dimensions according to the applied voltage of the present invention, the focal position of the light passing through the transmission part is changed in three dimensions, so that not only automatic focal length adjustment in the optical direction but also hand shake phenomenon can be corrected. There are advantages.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

The summary set forth above as well as the detailed description of the preferred embodiments of the present application set forth below may be better understood when read in conjunction with the accompanying drawings. For the purpose of illustrating the invention, there are shown in the drawings preferred embodiments. It should be understood, however, that the present application is not limited to the precise arrangements and instrumentalities shown.
1 is a schematic cross-sectional view for expressing the overall configuration of a three-dimensional variable focus gel lens according to a first embodiment of the present invention;
Figure 2 is a view showing the state of the lower portion of the substrate provided with the first electrode and the second electrode of the three-dimensional variable focus gel lens according to the first embodiment of the present invention;
3 is a view showing an upper portion of a substrate provided with a first electrode and an anti-distortion unit composed of a plurality of three-dimensional variable focus gel lenses according to a first embodiment of the present invention;
4 is a cross-sectional view AA′ showing a state before voltage is applied to a plurality of unit electrodes of the three-dimensional variable focus gel lens according to the first embodiment of the present invention;
5 is a cross-sectional view AA′ showing a state in which a uniform voltage is applied to a plurality of unit electrodes of the three-dimensional variable focus gel lens according to the first embodiment of the present invention, and the optical focus is elongated in the axial direction of the light;
6 is a cross-sectional view AA' showing a state in which a voltage is individually applied to the unit electrode of the three-dimensional variable focus gel lens according to the first embodiment of the present invention, and the optical focus is concentrated on one side of the horizontal direction based on the axial direction of the light; ;
7 is a cross-sectional view AA' showing a state in which a voltage is individually applied to the unit electrode of the three-dimensionally variable focus gel lens according to the first embodiment of the present invention, and the optical focus is concentrated to the other side in the horizontal direction with respect to the axial direction of the light; ;
8 is a schematic cross-sectional view for expressing the overall configuration of a three-dimensional variable focus gel lens according to a second embodiment of the present invention;
9 is a view showing an upper portion of an upper substrate provided with a first upper electrode and a first anti-distortion unit composed of a plurality of three-dimensional variable focus gel lenses according to a second embodiment of the present invention;
10 is a view showing a lower portion of an upper substrate provided with a second upper electrode and an upper portion of a lower substrate provided with a second lower electrode of a three-dimensional variable focus gel lens according to a second embodiment of the present invention;
11 is a view showing a lower portion of a lower substrate provided with a first lower electrode and a second anti-distortion unit of a three-dimensional variable focus gel lens according to a second embodiment of the present invention;
12 is a BB showing a horizontally asymmetrical state of a first partial surface and a second partial surface to which voltages are applied to a plurality of unit electrodes of a three-dimensionally variable focus gel lens according to a second embodiment of the present invention; 'It's a cross-section.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention in which the objects of the present invention can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same names and the same reference numerals are used for the same components, and an additional description thereof will be omitted.

The present invention relates to a three-dimensional variable focus gel lens and will be described in detail with reference to the drawings.

1 is a schematic cross-sectional view for expressing the overall configuration of a three-dimensional variable focus gel lens according to a first embodiment of the present invention, and FIG. 2 is a three-dimensional variable focus gel lens according to a first embodiment of the present invention. It is a view showing the state of the lower portion of the substrate provided with the first electrode and the second electrode of the present invention, Figure 3 is a first electrode and a distortion prevention section comprising a plurality of three-dimensional variable focus gel lens according to the first embodiment of the present invention is provided It is a view showing the upper part of the substrate, and FIG. 4 is a cross-sectional view AA` showing the state before voltage is applied to the plurality of unit electrodes of the three-dimensional variable focus gel lens according to the first embodiment of the present invention, and FIG. 5 is It is a cross-sectional view AA` showing a state in which a uniform voltage is applied to the plurality of unit electrodes of the three-dimensional variable focus gel lens according to the first embodiment of the present invention, and thus the light focus is elongated in the axial direction of light, and FIG. 6 is a cross-sectional view of the present invention. It is an AA` cross-sectional view showing a state in which a voltage is individually applied to the unit electrode of the three-dimensional variable focus gel lens according to the first embodiment and the optical focus is concentrated on one side of the horizontal direction with respect to the axial direction of the light, and FIG. It is an AA` cross-sectional view showing a state in which a voltage is individually applied to the unit electrode of the three-dimensional variable focus gel lens according to the first embodiment of the present invention, and the optical focus is concentrated to the other side in the horizontal direction with respect to the axial direction of the light, FIG. is a schematic cross-sectional view for expressing the overall configuration of a three-dimensional variable focus gel lens according to a second embodiment of the present invention, and FIG. 9 is a plurality of three-dimensional variable focus gel lenses according to a second embodiment of the present invention. It is a view showing the upper part of the upper substrate provided with the first upper electrode and the first distortion prevention part, and FIG. 10 is the upper substrate on which the second upper electrode of the three-dimensional variable focus gel lens according to the second embodiment of the present invention is provided. It is a view showing the upper part of the lower substrate provided with the lower part and the second lower electrode, and FIG. 11 is the lower part provided with the first lower electrode and the second anti-distortion part of the three-dimensional variable focus gel lens according to the second embodiment of the present invention. It is a view showing the lower part of the substrate, and FIG. 12 is a three-dimensional variable focus gel lens according to a second embodiment of the present invention. B-B' is a cross-sectional view showing a state in which the first partial surface and the second partial surface to which voltages are individually applied to a plurality of unit electrodes are horizontally asymmetrical.

Referring to FIG. 1 , the configuration of the three-dimensional variable focus gel lens 10 according to the first embodiment of the present invention may largely include a first electrode 100 , a second electrode 200 , and a transmission part 300 . have.

The first electrode 100 is formed on the substrate 400 and is configured to have a polarity different from that of the second electrode 200 , so that a voltage may be applied from an external power source.

Here, at least one of the first electrode 100 and the second electrode 200 is formed in plurality so that a voltage can be applied individually. When only the first electrode 100 is formed in plurality, the first electrode 100 is The unit electrode 120 and the electrode lead 140 connected to the unit electrode 120 may be included, and the electrode lead 140 connected to one side of the unit electrode 120 may be connected to an external power source.

In the embodiment to be described below, although it has been described that the first electrode 100 is formed of four, it may also be formed of six, eight, ten, or twelve.

Specifically, a through hole 420 may be formed in the substrate 400 , and the first electrode 100 is composed of a plurality of positive (+) electrode unit electrodes 120 along the inner peripheral surface of the through hole 420 ( 400) may be provided on the upper part.

Here, the unit electrode 120 may be provided on the upper portion of the through hole 420 , and may be formed to extend from the upper end to the lower end of the through hole 420 as shown in FIG. 1 to be disposed spaced apart from each other at a predetermined interval. may be

In this case, the second electrode 200, which is not composed of a plurality, may include a second electrode lead 240 configured as a negative (-) pole and connected to an external power source.

The transmission part 300 is formed of an electro-active polymer (hereinafter referred to as EAP), and when a voltage is applied to the first electrode 100 and the second electrode 200, the shape is deformed in three dimensions to the transmission part 300 The focal position of the light passing through can be varied in three dimensions.

Specifically, the transmission part 300 may be formed of a conductive polymer, and may be formed of any one of a single-wall carbon nanotube, a multi-wall carbon nanotube, a Nafion polymer, and SSEBS. may be

In addition, the transmission part 300 may be configured in the form of a polymer on a transparent gel. In order to perform the role of a lens, it is essential to be transparent, and it is preferable that it is formed in a gel form, not a liquid, which has a certain shape and whose surface shape is changed depending on whether a voltage is applied. For this, polyvinyl chloride (PVC) , a general-purpose polymer such as polyethylene may be used to form the transmission part 300 .

In addition, the transmission part 300 is designed to have a partial surface 320 protruding in the form of a convex lens on the upper part of the body in the form of a flat plate, and spaced apart by a predetermined distance d by a first electrode 100 provided under the substrate and When a voltage is applied to the second electrode 200 , the shape is deformed in three dimensions, so that the focal position of the light passing through the partial surface 320 may be changed in three dimensions.

Specifically, a partial surface 320 of the transmission part 300 has a semi-spherical shape without a lower portion centered on the central side of the sphere when viewed in FIG. 1 , and when viewed again in a cross-sectional view A-A`, it can be expressed as a partial surface 320 in a semicircular shape.

In other words, the transmissive part 300 may be formed to protrude in the form of a hemisphere having no lower side with respect to the central side of the sphere on the upper portion of the body of the rectangular parallelepiped shape through which light is transmitted.

At this time, a portion of the hemispherical surface 320 protruding from the body may be formed so as to be introduced into the through hole 420 of the substrate 400 and exposed to incident light, and a voltage applied to the first electrode 100 and the second electrode 200 may be applied. When this is applied, the partial surface 320 may be deformed into an asymmetric shape.

In addition, the transmission part 300 may be provided with only one body so that when a voltage is applied, some surface 320 protrudes through the through hole 420 and is exposed to incident light.

In other words, the transmission part 300 has a substrate 400 having a first electrode 100 and a second electrode 200 disposed thereon, and a partial surface 320 through a through hole 420 formed in the substrate 400 . It is formed so as to be exposed so that when a voltage is applied to the first electrode 100 and the second electrode 200, the partial surface 320 is deformed to serve as a lens.

In addition, an insulating member may be further included on the lower surface of the transmissive part 300 to insulate the transmissive part 300 , and the insulating member may be formed to surround the entire surface of the transmissive part 300 , and incident light Lpaa is transmitted through the transmissive part ( 300) and may be formed in the form of a transparent glass substrate (Glass), a transparent plastic film, or a sheet substrate to have high transmittance.

At this time, according to the target voltage between the first electrode 100 and the second electrode 200 , the second electrode 200 is deposited on the transparent substrate (Glass) formed under the transmissive part 300 instead of the lower part of the substrate 400 . could be

If you learn more about the preset distance d with reference to FIG. 2 showing the lower portion of the substrate 400 , the preset distance d is the distance between the first electrode 100 and the second electrode 200 between the substrate 400 . It is a distance spaced apart from each other based on the lower part, and is set in response to a voltage in a preset range applied to the transmission part 300 because it is inversely proportional to the strength of the electric field formed between the first electrode 100 and the second electrode 200 . can be

Specifically, if the preset distance d on the substrate 400 is too close, a short circuit between the first electrode 100 and the second electrode 200 may cause an overcurrent, and the preset distance d on the substrate may be too far. In this case, a mechanism in which electrical connection between the first electrode 100 and the second electrode 200 is impossible may be implemented.

For this reason, the first electrode for minimizing the electric power supplied between the first electrode 100 and the second electrode 200 from the external power source by presetting a range of voltage required to change the shape of the transmission part 300 . There is an advantage that the distance between 100 and the second electrode 200 can be set in advance. Specifically, the range of voltage required to change the shape of the transmission part 300 is set to 1 [V] to 10 [V]. It is preferable to

In addition, the plurality of first electrodes 100 to which voltages are individually applied from an external power source will be described in detail with reference to FIG. 3 showing the upper portion of the substrate 400 as follows.

Specifically, in the unit electrode 120 of the first electrode 100 along the through hole 420 of the substrate 400, four unit electrodes 120a, 120b, 120c, and 120d of the same shape are spaced apart from each other by a predetermined interval. Each of the unit electrodes 120a, 120b, 120c, and 120d may be connected to an external power source by the first electrode wires 140a, 140b, 140c, and 140d.

For example, the unit electrodes 120a , 120b , 120c , and 120d may be provided in a circular arc shape so as to be in contact with the inner circumferential surface of the through hole 420 formed in the substrate 400 , respectively. At one end of the unit electrodes 120a, 120b, 120c, and 120d provided as have.

Here, the preset intervals 520a, 520b, 520c, and 520d shown in FIG. 3 will be described later, and first, the incident light Lpaa passes through the transmission unit 300 according to the individually applied voltage to the output light Lpab. Looking at the principle and shape of the variable focus in the optical axis direction through FIG. 4 , which is a cross-sectional view taken along line AA′ of FIG. 1 , first, the first electrode 100 and the second electrode 200 are in a semicircular shape in a state in which no voltage is applied. The partial surface 320 formed to protrude transmits the incident light Lpaa and collects the output light Lpab to the focus F1.

At this time, the transmission part 300 is made of an Electroactive Polymer (EAP) material having the property of going as close as possible to the electrode to which the voltage is applied, and the first provided on the substrate 400 laminated on the top of the transmission part 300 . The transmissive part 300 is formed to be exposed on the upper side of the substrate 400 according to the magnitude of the voltage applied to the first electrode 100 and the second electrode 200 in contact with the electrode 100 and the second electrode 200 . Thus, when a voltage is applied to the first electrode 100 and the second electrode 200 , the partial surface 320 is provided to be deformed, thereby serving as a lens.

In other words, a portion of the surface 320 of the transmissive part 300 that is in contact with one side of the first electrode 100 and the second electrode 200 to which voltage is individually applied is three-dimensionally deformed, and thus the output light ( The focus F1 of Lpab) may be varied.

Referring in detail to the change of focus due to the three-dimensional shape deformation of the partial surface 320 through FIG. 5 , first, when the same voltage of 10 (V) is applied to all the unit electrodes 120a, 120b, 120c, and 120d, Partial surface 320 of the semicircular shape is deformed to have a larger radius of curvature, and thus the incident light Lpaa is transmitted, so that the focal length F2 of the output light Lpab becomes longer than the focal length F1. It becomes possible to change the focus along the optical axis (for example, the Z axis).

On the other hand, when the voltage of at least one of the unit electrodes 120a, 120b, 120c, and 120d is 5 (V) and all other voltages are 10 (V), the horizontal axis (eg, X) of the optical axis (eg, Z-axis) A partial surface 320 of an asymmetric shape having an inclination with respect to the axis or the Y-axis may be formed.

Referring to FIGS. 6 and 7 , looking closely at the variable focus along the X-axis or the Y-axis, a partial surface 320 of an asymmetric shape is formed by varying the voltage of at least one of the unit electrodes 120a, 120b, 120c, and 120d. And assuming that the horizontal axis of the optical axis is the X-axis, the partial surface 320 has an inclination with respect to the X-axis direction, and the incident light Lpaa is the output light Lpab due to the inclination of the partial surface 320 to one side. The focus may be changed from F1 to F3 as shown in FIG. 6 or from F1 to F4 as shown in FIG. 7 .

In other words, by forming the partial surface 320 of the asymmetric shape having an inclination, it is possible to change the focus along the X-axis or the Y-axis.

The reason for this is that the focus position of the light passing through the transmission unit 300 is changed in three dimensions, so that not only the automatic focus distance adjustment in the light direction but also the focus is changed in the horizontal direction based on the light direction to prevent hand shake without securing a separate space. It has the advantage of being able to correct even.

The three-dimensional variable focus gel lens 10 having the configuration as described above may further include an anti-distortion unit 500 .

The distortion prevention unit 500 may serve to prevent distortion of the shape of the transmission unit 300 by blocking electrical interference between the plurality of unit electrodes 120 .

Specifically, the anti-distortion unit 500 may be a predetermined region formed on the substrate 400 such that the unit electrodes 120 are disposed to be spaced apart from each other at a predetermined interval, and the distortion-preventing unit 500 may include the substrate 400 . ), an insulating material may be applied on a predetermined area to double block the interference between the unit electrodes 120 .

For example, the substrate 400 may be a printed circuit board formed to efficiently configure the first electrode 200 and the second electrode 300 , and the distortion prevention unit 500 is formed in plurality. It may be a region formed between the first electrodes 200 .

Here, the distortion prevention part 500 provided in a predetermined area of the substrate 400 is a method for imparting insulation and heat resistance to metal among the surface treatment techniques of the metal, of any one of a non-metal spraying method, a screen printing method, and a resin film adhesion method. In this way, an insulating material can be applied.

Specifically, the anti-distortion unit 500 may form an insulating layer by coating a ceramic having excellent thermal conductivity to correspond to a predetermined region.

Referring to the upper portion of the substrate through FIG. 3 , the unit electrodes 120a , 120b , 120c , and 120d of the first electrode 100 are formed along the through hole 420 in regions 520a and 520b on the substrate 400 . , 520c, 520d) are spaced apart from each other by a predetermined interval by the distortion prevention part 500 formed of , 520c, 520d, and each of the unit electrodes 120a, 120b, 120c, 120d is the first electrode conductor 140a, 140b, 140c, 140d. connected to an external power source.

Here, the distortion prevention unit 500 is disposed on the through hole 420 such that the unit electrodes 120a, 120b, 120c, and 120d of the first electrode 100 formed in the through hole 420 are spaced apart from each other at a predetermined interval. As a region to be formed, it may have a length corresponding to the through hole 420 .

In addition, the distortion prevention unit 500 may be formed to have the same width as a predetermined interval between the unit electrodes 120a, 120b, 120c, and 120d of the first electrode 100 .

Here, the predetermined interval may vary depending on the diameter of the through-hole 420 formed in the substrate 400 , and may be designed in inverse proportion to the number of electrodes formed in plurality, and the predetermined interval is a portion of the transmissive part 300 . It is preferable to design in consideration of the voltage applied to the first electrode 100 and the second electrode 200 so that the 320 is implemented in a target shape.

Specifically, the predetermined interval may be 50 μm to 1000 μm, and when the interval between the plurality of electrodes is less than 50 μm, a short circuit between the plurality of electrodes occurs or electrical interference occurs and each applied individually voltage deviates from the target voltage, and thus the target shape may be deformed. As a result, the focus of the output light Lpab transmitted through the transmission unit 300 cannot be moved in a desired direction.

On the other hand, if the interval between the plurality of electrodes exceeds 1000 μm, for example, one side of the partial surface 320 of the transmission part 300 that is deformed in response to the individually applied first electrode 120a and Since a region to which no voltage is applied is formed between the other side of the partial surface 320 of the transmissive part 300 that is deformed corresponding to the individually applied first electrode 120b, the transmissive part 300 is limited in the range of shape deformation. do. Accordingly, the range of the focus movement of the output light Lpab transmitted through the transmission unit 300 may be limited.

By setting the distance between the plurality of first electrodes 100 to 50 μm to 1000 μm, shape distortion including distortion of the shape of the partial surface 320 targeted by the transmission part 300 can be prevented, and accordingly There is an advantage in that it is possible to prevent an error with respect to a three-dimensional focus movement.

8, the configuration of the three-dimensional variable focus gel lens 20 according to the second embodiment of the present invention is largely a first upper electrode 1100, a second upper electrode 1200, an upper substrate 1400, It may include a transmission part 1300, a first lower electrode 2100, a second lower electrode 2200, and a lower substrate 2400, and may further include an upper distortion prevention part 1500 and a lower distortion prevention part 2500. may be

Specifically, the upper substrate 1400 in which the upper through-hole 1420 is formed and the lower substrate 2400 in which the lower through-hole 2420 is formed at a position opposite to the upper through-hole 1420 are disposed, and the upper substrate 1400 and The transmission part 1300 may be formed between the lower substrate 2400 so that some surfaces 1320 and 1340 are exposed to the upper through-hole 1420 and the lower through-hole 2420 , respectively.

At this time, the upper distortion preventing part 1500 may be formed between the first upper electrodes 1100 provided in the upper through hole 1420 , and the lower distortion preventing part 2500 is the first lower part provided in the lower through hole 1520 . It may be formed between the electrodes 2100 .

In this case, the transmission part 1300 may have a first partial surface 1320 formed on one side and a second partial surface 1340 formed on the other side, and the transmission part 1300 may have an electro-active polymer (Electro-active) as in the first embodiment. Polymer, hereinafter referred to as EAP), and when a voltage is applied to the first upper electrode 1100 and the second upper electrode 1200, the shape is deformed in three dimensions so that the focal position of the light passing through the first partial surface 1320 is It can be varied in three dimensions, and when a voltage is applied to the first lower electrode 2100 and the second lower electrode 2200, the shape is deformed in three dimensions, so that the focal position of the light passing through the second partial surface 1340 is three-dimensional. can be changed to

Here, the upper anti-distortion unit 1500 and the lower anti-distortion unit 2500 will be described later, and first with reference to FIG. 9 , the first upper electrode ( 1100), an upper through hole 1420 may be formed in the upper substrate 1400, and the first upper electrode 1100 is composed of a plurality of upper unit electrodes 1120 having positive (+) poles. It may be provided on the upper substrate 1400 along the inner peripheral surface of the upper through-hole 1420 .

Specifically, the first upper electrode 1100 includes an upper unit electrode 1120 and a first upper electrode wire 1140, and the upper unit electrode 1120 has a preset value from the upper end to the lower end of the upper through hole 1420. They are spaced apart from each other and provided with a first upper electrode lead 1140 on the upper substrate 1400 to be connected to an external power source.

Referring to FIG. 10 , the second upper electrode 1200 , which is not composed of a plurality, is formed of a negative (-) pole and is provided under the upper substrate 1400 , and one end of the second upper electrode wire 1240 is connected to the second upper electrode 1200 . The upper electrode lead 1240 may be connected to an external power source.

In this case, the second upper electrode 1200 may be provided under the upper substrate 1400 while being spaced apart from the first upper electrode 1100 by a predetermined distance d.

The transmission part 1300 may be formed in the lower part of the upper substrate 1400 as described above. Specifically, the first partial surface 1320 may be exposed through the upper through hole 1420 of the upper substrate 1400 .

In other words, the transmissive part 1300 has an upper substrate 1400 having a first upper electrode 1100 and a second upper electrode 1200 on the upper side is stacked, and through an upper through hole 1420 formed in the upper substrate 1400 . The first partial surface 1320 is formed to be exposed so that when a voltage is applied to the first upper electrode 1100 and the second upper electrode 1200, the first partial surface 1320 is provided so as to be deformed to perform the role of a lens. have.

At this time, a second partial surface 1340 may be formed on the lower surface of the transmission part 1300 at a position opposite to the first partial surface 1320 , and the lower substrate 2400 has the second partial surface 1340 of the lower substrate. It is preferable to be exposed to the lower through-hole 2420 of the 2400 and disposed at a position opposite to the upper through-hole 1420 so as to serve as a lens.

In other words, based on the lower substrate 2400 , the transmissive part 1300 is stacked on the upper part of the lower substrate 2400 , and the upper substrate 1400 may be stacked on the upper part of the transmissive part 1300 , and formed on the upper substrate 1400 . The first partial surface 1320 is exposed through the upper through hole 1420 so that when a voltage is applied to the first upper electrode 1100 and the second upper electrode 1200, the first partial surface 1320 is deformed. can be provided.

At this time, the first partial surface 1320 formed on the upper portion of the transmission part 1300 is exposed through the upper through-hole 1420 , and the second partial surface 1340 formed under the transmission part 1300 is the lower substrate 2400 . It may be exposed through the lower through-hole 2420 .

Referring to FIG. 11 , the first lower electrode 2100 is formed in the lower through hole 2420 in the same shape as the above-described first upper electrode 1100 and the second upper electrode 1200 provided in the upper through hole 1420 . may be formed, and the first lower electrode 2100 may be provided under the lower substrate 2400 along the inner circumferential surface of the lower through hole 2420 by having a plurality of lower unit electrodes 2120 having a positive (+) pole. .

Specifically, the first lower electrode 2100 includes a lower unit electrode 2120 and a first lower electrode wire 2140, and the lower unit electrode 2120 has a preset value from the lower end to the upper end of the lower through hole 2420. They are spaced apart from each other at intervals, and a first lower electrode wire 2140 may be provided under the lower substrate 2400 to be connected to an external power source.

In addition, referring to FIG. 10 described above, the second lower electrode 2200, which is not composed of a plurality, has a negative (-) pole and is provided on the upper side of the lower substrate 2400 and is connected to an external power source on one side. (2240) may be included.

Here, the first lower electrode 1200 and the second lower electrode 2200 provided in the same shape are both shown in FIG. 10 for convenience, but the first lower electrode 1200 is provided below the upper substrate 1400 and 2 The lower electrode 2200 is provided on the upper side of the lower substrate 2400 .

In this way, voltage is individually applied to the first upper electrode 1100 and the second upper electrode 1200 to three-dimensionally deform the first partial surface 1320, and the first lower electrode 2100 and the second upper electrode 1200 are independently applied thereto. 2 By individually applying voltage to the lower electrode 2200 to three-dimensionally deform the second partial surface 1340, there is an advantage of improving the controllable range of focus and accuracy.

Meanwhile, the preset distance d is a distance between the first upper electrode 1100 and the second upper electrode 1200 and a distance between the first lower electrode 2100 and the second lower electrode 2200 . Since the preset distance d has the same function and shape as the preset distance d described above in the first embodiment, a description thereof will be omitted.

With reference to FIG. 12 , the focus variable of the three-dimensional variable focus gel lens 20 according to the second embodiment will be described in detail as follows.

As described above, along the upper through hole 1420 of the upper substrate 1400, the upper unit electrode 1120 of the first upper electrode 1100 has four upper unit electrodes 1120a having the same shape as in FIG. 9 described above. 1120b, 1120c, and 1120d) may be configured to be spaced apart from each other by a predetermined interval, and each of the upper unit electrodes 1120a, 1120b, 1120c, and 1120d is connected to the outside by the first upper electrode wires 1140a, 1140b, 1140c, and 1140d. connected to the power source.

In addition, the lower unit electrode 2120 of the first lower electrode 2100 along the lower through hole 2420 of the lower substrate 2400 is formed of four lower unit electrodes 2120a, 2120b, and 2120c having the same shape as in FIG. 11 described above. , 2120d) may be configured to be spaced apart from each other by a predetermined interval, and each of the lower unit electrodes 2120a, 2120b, 2120c, and 2120d is connected to an external power source by the first lower electrode wires 2140a, 2140b, 2140c, and 2140d. do.

In the same manner as in the first embodiment, the semicircular first partial surface 1320 in a state in which no voltage is applied to the first upper electrode 1100 and the second upper electrode 1200 transmits the incident light Lpaa. In a state in which no voltage is applied to the first lower electrode 2100 and the second lower electrode 2200 , the semicircular second partial surface 1340 outputs the transmitted incident light Lpaa to output the output light Lpab. ) to the focal point (F1).

For example, the same voltage in the range of 1 (V) to 10 (V) is applied to the upper unit electrodes 1120a, 1120b, 1120c, and 1120d, respectively, and independently from this, respectively, to the lower unit electrodes 2120a, 2120b, 2120c, and 2120d When the same voltage in the range of 1 (V) to 10 (V) is applied, it is possible to vary the focal length twice in the optical axis than in the configuration of the first embodiment.

Also, as in the first embodiment, when at least one voltage among the upper unit electrodes 1120a, 1120b, 1120c, and 1120d is 5 (V) and all other voltages are 10 (V), the horizontal axis of the optical axis (for example, the Z-axis) A first partial surface 1320 having an asymmetric shape having an inclination with respect to a direction axis (eg, X-axis or Y-axis) may be formed, and the lower unit electrodes 2120a, 2120b, 2120c, and 2120d also have at least one voltage. Only 5 (V) and the rest are all 10 (V), so the second partial surface of the asymmetric shape has an inclination with respect to the horizontal axis (eg X or Y axis) of the optical axis (eg Z axis). 1340 may be formed.

For example, assuming that the horizontal axis of the optical axis is the X-axis, as shown in FIG. 12 , an asymmetric shape having an upward inclination from left to right by varying the voltage of at least one of the upper unit electrodes 120a, 120b, 120c, and 120d. Forming a first partial surface 1320 of the lower unit electrodes 2120a, 2120b, 2120c, and 2120d by varying the voltage of at least one of the lower unit electrodes 2120a, 2120b, 2120c, and 2120d to form a first asymmetrical shape with respect to the central horizontal cross-section of the transmission part 1300 . 2 A partial surface 1340 may be formed.

Specifically, some surfaces 1320 and 1340 of an asymmetric shape having an inclination are provided on both sides of the transmission part 1300, respectively, and some surfaces 1320 and 1340 are formed to be deformable, so that the focus passing through the transmission part 1300 ( F11) may be moved to a focus F12.

At this time, the variable focus F12 is horizontal to the optical axis as well as the optical axis (Z axis) compared to the variable focus F4 by providing only one partial surface 320 in the cross section of the transmitting part 300 in the first embodiment. It can be further varied in the axis (X-axis or Y-axis).

That is, based on the first embodiment, the range in which the focus position of the light passing through the transmission unit 1300 can be varied in three dimensions is expanded, so that not only the automatic focus distance adjustment in the light direction but also the focus is set in the horizontal direction based on the light direction It can have the advantage of being able to even correct hand shake without securing a separate space.

Meanwhile, when the upper distortion prevention part 1500 and the lower distortion prevention part 2500 of the three-dimensional variable focus gel lens 20 to be described later are described in detail, the distortion prevention part 500 described in the first embodiment and have the same function.

The upper distortion preventing unit 1500 is formed on the upper substrate 1400 to block electrical interference between the plurality of upper unit electrodes 1120, thereby preventing shape distortion of the transmitting unit 1300, and preventing lower distortion. The part 2500 may be formed on the lower substrate 2400 to block electrical interference between the plurality of lower unit electrodes 2120 , thereby preventing distortion of the shape of the transmission part 1300 .

Specifically, the anti-distortion units 1500 and 2500 may be predetermined regions formed on the substrates 1400 and 2400 such that the upper unit electrode 1120 and the lower unit electrode 2120 are spaced apart from each other at a predetermined interval. .

In addition, the distortion preventing units 1500 and 2500 may apply an insulating material on a predetermined area of the substrate 1400 and 2400 to double block the interference between the upper unit electrode 1120 and the lower unit electrode 2120 .

Here, the substrates 1400 and 2400 and the configuration that can be formed of the insulating material are the same as the configuration described in the first embodiment, so a description thereof will be omitted.

If the configuration of the upper distortion prevention unit 1500 is described in detail with reference to FIG. 9 described above, the upper distortion prevention unit 1500 includes the upper unit electrode 1120a of the first upper electrode 1100 formed in the upper through hole 1420, As an area formed on the upper through-hole 1420 so that 1120b, 1120c, and 1120d are spaced apart from each other at a predetermined interval, the region may have a length corresponding to the upper through-hole 1420 .

Specifically, the upper unit electrodes 1120a, 1120b, 1120c, and 1120d of the first upper electrode 1100 along the upper through-hole 1420 are formed as regions 1520a, 1520b, 1520c, and 1520d on the upper substrate 1400 . The upper unit electrodes 1120a, 1120b, 1120c, and 1120d are spaced apart from each other by a predetermined distance by the upper distortion prevention unit 1500, and each of the upper unit electrodes 1140a, 1140b, 1140c, and 1140d is connected to an external power supply by the first upper electrode wire 1140a, 1140b, 1140c, 1140d. can be connected with

In addition, the upper distortion prevention part 1500 may be formed to have the same width as a predetermined interval between the upper unit electrodes 1120a , 1120b , 1120c , and 1120d of the first upper electrode 1100 .

Here, the predetermined interval may vary depending on the diameter of the upper through-hole 1420 formed in the upper substrate 1400 , and may be designed in inverse proportion to the number of electrodes formed in plurality, and the predetermined interval is the transmission portion 1300 . It is preferable to design in consideration of the voltage applied to the first upper electrode 1100 and the second upper electrode 1200 so that the first partial surface 1320 is implemented in a target shape. Specifically, the predetermined interval is 50 μm. to 1000 μm.

Like the upper distortion preventing unit 1500, the lower distortion preventing unit 2500 includes the lower unit electrodes 2120a, 2120b, 2120c, of the second lower electrode 2100 formed in the lower through hole 2420 with reference to FIG. 11 described above. 2120d) is a region formed on the lower through-hole 2420 so as to be spaced apart from each other at a predetermined interval, and may have a length corresponding to the lower through-hole 2420, and the lower distortion prevention part 2500 is the first lower portion The electrode 2100 may be formed to have the same width as a preset interval between the lower unit electrodes 2120a, 2120b, 2120c, and 1120d.

Specifically, the lower unit electrodes 2120a, 2120b, 2120c, and 2120d of the first lower electrode 2100 along the lower through-hole 2420 are formed in regions 2520a, 2520b, 2520c, and 2520d on the lower substrate 2400. The lower unit electrodes 2120a, 2120b, 2120c, and 2120d are spaced apart from each other by a predetermined interval by the lower distortion prevention unit 2500, and each of the lower unit electrodes 2140a, 2140b, 2140c, and 2140d is connected to an external power supply by the first lower electrode lead wire 2140a, 2140b, 2140c, 2140d. can be connected with

Here, the predetermined interval may also vary according to the diameter of the lower through-hole 2420 formed in the lower substrate 2400, and may be designed in inverse proportion to the number of electrodes formed in plurality, and the predetermined interval is the lower penetrating part 2300. It is preferable to design in consideration of the voltage applied to the first lower electrode 2100 and the second lower electrode 2200 so that the second partial surface 1340 of the second part 1340 is implemented in a target shape. Specifically, the predetermined interval is 50 It may be in the range of μm to 1000 μm.

In other words, by setting the distance between the plurality of first upper electrodes 1100 and the distance between the plurality of first lower electrodes 2100 to 50 μm to 1000 μm, the partial surface 320 targeted by the transmission part 300 is There is an advantage in that it is possible to prevent shape distortion, including distortion of the shape, and accordingly, an error in three-dimensional focus movement can be prevented.

As described above, preferred embodiments according to the present invention have been described, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is one of ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

10: three-dimensional variable focus gel lens
100: first electrode
200: second electrode
300: transmission part
400: substrate
500: distortion prevention unit

Claims (8)

a first electrode and a second electrode formed on the substrate and having different polarities; and
a transmissive part formed of an electroactive polymer, the shape of which is deformed when a voltage is applied to the first electrode and the second electrode;
including,
At least one of the first electrode and the second electrode is formed in plurality and a voltage is applied individually to deform the shape of the transmitting portion in three dimensions, whereby the focal position of the light passing through the transmitting portion is changed in three dimensions to do
A three-dimensional variable focus gel lens. According to claim 1,
A plurality of electrodes among the first electrode and the second electrode includes a plurality of unit electrodes to which voltages are individually applied on the substrate,
By blocking the electrical interference between the plurality of unit electrodes, further comprising a distortion preventing part for preventing shape distortion of the transmission part
A three-dimensional variable focus gel lens. 3. The method of claim 2,
The distortion prevention unit,
wherein the plurality of unit electrodes are formed on the substrate so as to be spaced apart from each other at a predetermined interval.
A three-dimensional variable focus gel lens. 4. The method of claim 3,
The predetermined interval is,
50 μm to 1000 μm
A three-dimensional variable focus gel lens. 4. The method of claim 3,
The transmissive part is disposed so that a partial surface thereof is exposed to the through hole formed in the substrate,
Any one of the first electrode and the second electrode is composed of a plurality of unit electrodes and is provided on the upper portion of the substrate along the inner circumferential surface of the through hole,
The other one of the first electrode and the second electrode that is not composed of a plurality of unit electrodes is spaced apart from the inner circumferential surface of the through-hole by a predetermined distance to surround the through-hole, characterized in that it is provided under the substrate
A three-dimensional variable focus gel lens. 6. The method of claim 5,
The predetermined distance is a distance between the first electrode and the second electrode,
characterized in that it is set in response to a voltage in a preset range applied to the transmissive portion from the first electrode and the second electrode
A three-dimensional variable focus gel lens. 6. The method of claim 5,
The distortion prevention unit,
characterized in that it is formed between the plurality of unit electrodes so that the plurality of unit electrodes can be arranged at a predetermined interval.
A three-dimensional variable focus gel lens. 8. The method of claim 7,
The predetermined interval is an interval between a plurality of unit electrodes,
Variable according to the diameter of the through hole
A three-dimensional variable focus gel lens.

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