CN215678834U - Electrically-controlled liquid lens with variable focal length - Google Patents
Electrically-controlled liquid lens with variable focal length Download PDFInfo
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- CN215678834U CN215678834U CN202122103237.0U CN202122103237U CN215678834U CN 215678834 U CN215678834 U CN 215678834U CN 202122103237 U CN202122103237 U CN 202122103237U CN 215678834 U CN215678834 U CN 215678834U
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Abstract
The utility model discloses an electric control liquid lens with variable focal length, which comprises: the liquid lens is a main body part and is arranged on the lens slide rail, and the liquid lens is connected with the power injector; the liquid lens includes: two PDS films are clamped between the two clamping cover rings, and a liquid cavity is formed by a gap between the two PDS films; the power injector includes: and the rear part of the injection guide pipe is connected with the liquid tank and the electric piston, and the movement of the electric piston is controlled by the singlechip control module. On the basis of not changing an external structure, the product realizes the zoom of the lens by injecting and extracting liquid, and solves the problem that the focal length of the original single solid lens is not changeable; the liquid in the liquid lens can be flexibly replaced to adapt to different cost requirements and performances.
Description
Technical Field
The utility model relates to the field of lenses, in particular to an electric control liquid lens with a variable focal length.
Background
The technology of making lenses from liquid and adjusting the focal length by changing the volume and shape of the liquid is known as liquid lens zoom technology, most typically the lens structure in the human eye. With the development of optical technology, the conventional lens set with fixed focal length is too complicated, and people hope to make a lens with a single structure to realize flexible zooming instead of the conventional optical lens set. Because the liquid lens does not need a mechanical movable lens, the cost is lower than that of the traditional lens group, the service life of the lens can be greatly prolonged, and the liquid lens is convenient to miniaturize due to the simple structure. As early as 2004, Philips and Samsung developed so-called liquid lenses, respectively, which were then widely installed on computers, digital cameras, and the like.
The teaching of physical courses of primary and middle schools all contain optical contents, and especially in the course of primary schools, lens imaging is an important component. But a single solid lens cannot demonstrate a dynamic zooming process to students without the use of lens groups. In order to enable primary and secondary school students to learn the more flexible zoom imaging mode and develop the thinking of the students, a lens with a variable focal length is needed to meet the teaching requirement. However, the variable focus optical lens using the electrowetting on dielectric (EWOD) principle, which is currently the mainstream in the market, is generally expensive, and the cost of the variable focus optical lens is hard to bear by ordinary primary and secondary schools. Therefore, the liquid lens has reliable safety and low cost under the condition of ensuring basic lens imaging and zooming performance, is simple to operate, and can be widely applied to teaching or experimental activities.
At present, a complete zoom lens which meets the requirements and is specially manufactured for teaching and research activities of primary and secondary schools does not exist in the domestic market, the novel zoom liquid lens designed by the application fills the blank in the market, so that primary and secondary school students can understand and appreciate the focal length principle of the lens, and higher-quality equipment is provided for physical teaching of primary and secondary schools.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electrically controlled liquid lens with variable focal length, which aims to provide a liquid lens teaching device with variable focal length, simple operation and low cost for teaching and research activities of primary and secondary schools, and a single lens is used for showing a dynamic zooming process for students under the condition of not using a lens group, so that primary and secondary schools can learn the more flexible zooming imaging mode, and the thinking of the students is developed, and the liquid lens teaching device is described in detail as follows:
an electrically controllable variable focus liquid lens, the lens comprising: a liquid lens, the liquid lens being a body portion,
the liquid lens is arranged on the lens slide rail and is connected with the electric injector;
the liquid lens includes: two PDS films are clamped between the two clamping cover rings, and a liquid cavity is formed by a gap between the two PDS films;
the power injector includes: and the rear part of the injection guide pipe is connected with the liquid tank and the electric piston, and the movement of the electric piston is controlled by the singlechip control module.
Wherein the liquid lens further comprises: a liquid lens holder for holding a liquid lens,
the liquid lens support is provided with two clamping cover circular rings fixed by fastening screws, and the inner edge of the liquid cavity is provided with an o-shaped ring for preventing liquid from seeping outwards.
Furthermore, the thickness of the film is not more than 0.1 μm, the light transmittance is more than 92% in a visible light wave band, the tensile strength is not less than 3.5Mpa, the applicable temperature range is-40-200 ℃, and the film is nontoxic.
Wherein, the liquid chamber also comprises an exhaust hole and a matched exhaust hole plug thereof.
In one embodiment, the liquid injection hole and the exhaust hole are sealed by using silica gel.
The technical scheme provided by the utility model has the beneficial effects that:
1. the utility model clamps two organosilicon films (PDMS) by three aluminum rings, realizes the change of the focal length of a liquid (water, etc.) lens by injecting/extracting liquid into/from a cavity between the two films, and the process of injecting/extracting the liquid is completed by an electric control injector; the device has more accurate control on the focal length of the liquid lens, simple composition and low cost, and is suitable for mass production as an experiment/teaching tool;
2. on the basis of not changing an external structure, the variable focal length of the lens is realized by injecting and extracting liquid, and the problem that the focal length of the original single solid lens is not variable is solved; the liquid in the liquid lens can be flexibly replaced to adapt to different cost requirements and performances;
3. the device can utilize the imaging principle of a zoom lens to simulate human eyes, and shows the correction effect of the focal length change of the lens on the imaging effect to students; the design structure is simple, the manufacturing cost is low, and the requirement of batch manufacturing as teaching and research tools is met.
Drawings
FIG. 1 is a schematic diagram of a variable focus liquid lens apparatus;
FIG. 2 is a schematic structural view of a liquid chamber section;
fig. 3 is a schematic diagram of a power injector portion.
In the drawings, the components represented by the respective reference numerals are listed below:
1: a liquid lens; 2: a lens slide rail;
3: a power injector.
Wherein the content of the first and second substances,
1-1: a clamping cover ring; 1-2: a PDMS film;
1-3: a liquid chamber; 1-4: a liquid lens holder;
1-5: an O-shaped rubber ring; 1-6: fastening screws;
3-1: an injection catheter; 3-2: a liquid tank;
3-3: an electric piston; 3-4: a single chip microcomputer control module;
wherein the content of the first and second substances,
1-3-1: a liquid injection hole; 1-3-2: an exhaust hole;
1-3-3: a bracket mounting hole; 1-3-4: a vent hole plug;
3-4-1: a housing; 3-4-2: an input keyboard;
3-4-3: and displaying the screen.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below.
Example 1
An electrically controlled variable focus liquid lens, see fig. 1-3, the device is mainly composed of: the liquid lens comprises a liquid lens 1, a lens slide rail 2 and an electric injector 3.
The liquid lens 1 is a main body part, the liquid lens 1 is arranged on a lens slide rail 2, and the liquid lens 1 is connected with an electric injector 3.
Referring to fig. 2, the liquid lens 1 includes: the liquid lens comprises a liquid lens support 1-4, wherein two clamping cover circular rings 1-1 fixed by fastening screws 1-6 are arranged on the liquid lens support 1-4, two PDS films 1-2 are clamped between the two clamping cover circular rings, a liquid cavity 1-3 is formed by a gap between the two PDS films, and an o-shaped ring 1-5 for preventing liquid from seeping outwards is arranged at the inner edge of the liquid cavity 1-3.
Referring to fig. 2, the liquid chamber 1-3 further includes: a liquid injection hole 1-3-1 positioned at the right lower part of the whole lens, an exhaust hole 1-3-2 positioned right above the whole lens and an exhaust hole plug 1-3-4 matched with the exhaust hole, wherein the bottom of the outer layer of the liquid cavity is a bracket mounting hole 1-3-3;
referring to fig. 3, the power injector includes: an injection conduit 3-1 connected with the liquid injection hole 1-3-1, a liquid tank 3-2 and an electric piston 3-3 connected with the rear part of the injection conduit 3-1, and the electric piston 3-3 is controlled by a singlechip control module 3-4 to move.
The injection conduit 3-1 is connected with the liquid injection hole 1-3-1 in the figure 2, the precession of the electric piston 3-3 is controlled by a stepping motor in the singlechip control module 3-4, the transparent liquid is extruded into the cavity of the liquid lens 1, the PDMS (organic silicon) film 1-2 is filled with the liquid, the two films are kept in relative parallel in the vertical direction but are not deformed (deformation caused by gravity effect is ignored), the air in the cavity is discharged through the exhaust hole 1-3-2 in the liquid injection process, and the exhaust hole 1-3-2 is sealed by the exhaust hole plug 1-3-4 after the liquid injection is finished.
Further, after the liquid injection process is completed, the electric piston 3-3 performs zero calibration operation, and the single chip microcomputer control module 3-4 records the position of the piston at the moment as an initial position.
Referring to fig. 3, the single chip microcomputer control module 3-4 further includes: an input keyboard 3-4-2 and a display screen 3-4-3 are embedded in the integral packaging shell 3-4-1.
Further, when the focal length of the liquid lens 1 is enlarged, the input keyboard 3-4-2 sends focal length information of the liquid lens to be set to the single-chip microcomputer control module 3-4, the single-chip microcomputer control module 3-4 substitutes the input focal length information into a relational expression between the focal length of the liquid lens 1 and the liquid volume in the cavity, the liquid volume delta V needing to be increased is calculated, the single-chip microcomputer control module 3-4 controls the electric piston 3-3 to rotate forward through an electric signal, and liquid in the liquid tank 3-2 is squeezed to enter the cavity of the liquid lens 1.
Further, when the focal length of the liquid lens 1 is reduced, the input keyboard 3-4-2 sends focal length information of the liquid lens to be set to the single-chip microcomputer control module 3-4, the single-chip microcomputer control module 3-4 brings the input focal length information into a relational expression between the focal length of the liquid lens 1 and the liquid volume in the cavity, the liquid volume delta V to be reduced is calculated, the single-chip microcomputer control module 3-4 controls the electric piston 3-3 to be selected through an electric signal, and the liquid in the cavity of the liquid lens 1 is extruded into the liquid tank 3-2.
The step of calculating the liquid volume by the single chip microcomputer control module 3-4 is well known to those skilled in the art.
Example 2
The scheme of example 1 is further described below in conjunction with fig. 1-3, and is described in detail below:
referring to fig. 1 and 2, a liquid lens support 1-4 is connected with a lens slide rail 2, a liquid injection hole 1-3-1 is connected with an injection conduit 3-1, and the liquid injection hole is placed on a table after being assembled.
Referring to fig. 3, a singlechip control module 3-4 is used for controlling an electric piston 3-3, liquid in a liquid tank 3-2 is extruded into a lens cavity, and an exhaust hole 1-3-2 is sealed well after filling, so that liquid leakage is prevented.
Sending an instruction to the singlechip control module 3-4 by using the input keyboard 3-4-2, and setting the focal length of the liquid lens 1 to be realized; the singlechip control module 3-4 acquires the focal length from the input keyboard 3-4-2 and then controls the electric piston to move 3-3, liquid in the liquid tank 3-2 is squeezed into or extracted out of the liquid cavity 1-3, and the current focal length of the lens and the set focal length of the liquid lens are displayed on the display screen 3-4-3; and when the current focal length displayed by the display screen 3-4-3 is consistent with the set focal length, finishing the zooming process.
Preferably, the electric piston 3-3 is driven by a stepping motor, the minimum movement step is not more than 0.1mm, and an LCD display screen assembly is used as the display screen 3-4-3 for displaying the focal distance information of the liquid lens.
Furthermore, the thickness of the film is not more than 0.1 μm, the light transmittance is more than 92% in visible light wave band, the tensile strength is not less than 3.5Mpa, the applicable temperature range is-40 ℃ to 200 ℃, and the film is nontoxic.
Further, the inner diameter of the liquid chamber 1-3 is not more than 5cm to reduce the influence of the gravity effect on the curvature of the liquid lens surface caused by the liquid maldistribution. The liquid injection hole 1-3-1 and the exhaust hole 1-3-2 are sealed by silica gel.
In the embodiment of the present invention, except for the specific description of the model of each device, the model of other devices is not limited, as long as the device can perform the above functions.
Those skilled in the art will appreciate that the drawings are only schematic illustrations of preferred embodiments, and the above-described embodiments of the present invention are merely provided for description and do not represent the merits of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An electrically controllable variable focus liquid lens, said lens comprising: a liquid lens, the liquid lens being a body portion,
the liquid lens is arranged on the lens slide rail and is connected with the electric injector;
the liquid lens includes: two PDS films are clamped between the two clamping cover rings, and a liquid cavity is formed by a gap between the two PDS films;
the power injector includes: and the rear part of the injection guide pipe is connected with the liquid tank and the electric piston, and the movement of the electric piston is controlled by the singlechip control module.
2. An electrically controllable variable focus liquid lens as claimed in claim 1, wherein said liquid lens further comprises: a liquid lens holder for holding a liquid lens,
the liquid lens support is provided with two clamping cover circular rings fixed by fastening screws, and the inner edge of the liquid cavity is provided with an o-shaped ring for preventing liquid from seeping outwards.
3. The electrically controllable variable focus liquid lens as claimed in claim 1, wherein said film has a thickness not more than 0.1 μm, a light transmittance of more than 92% in the visible light band, a tensile strength of not less than 3.5Mpa, a suitable temperature range of-40 ℃ to 200 ℃, and no toxicity.
4. An electrically variable focal length liquid lens as claimed in claim 1, wherein the liquid chamber further comprises an exhaust hole and its associated exhaust plug.
5. The electrically controlled variable focal length liquid lens as claimed in claim 4, wherein the liquid injection hole and the gas exhaust hole are sealed by using silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122103237.0U CN215678834U (en) | 2021-09-02 | 2021-09-02 | Electrically-controlled liquid lens with variable focal length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122103237.0U CN215678834U (en) | 2021-09-02 | 2021-09-02 | Electrically-controlled liquid lens with variable focal length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215678834U true CN215678834U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122103237.0U Active CN215678834U (en) | 2021-09-02 | 2021-09-02 | Electrically-controlled liquid lens with variable focal length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215678834U (en) |
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2021
- 2021-09-02 CN CN202122103237.0U patent/CN215678834U/en active Active
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