Liquid lens, design and control method thereof and glasses

Abstract

The invention provides a liquid lens and a design and control method thereof, and belongs to the technical field of optics. The liquid lens comprises a lens frame, a first lens, a second lens, an elastic film and liquid. The shape of the first surface of the second lens in the optical effective area is determined according to the shape of the elastic film when the liquid lens is in the maximum diopter state, and the shape of the second surface of the first lens in the optical effective area is determined according to the shape of the elastic film when the liquid lens is in the minimum diopter state. The invention also provides a pair of glasses using the pair of glasses.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a liquid lens and a design and control method thereof, and glasses. Background Art

[0002] Traditional optical systems use lenses with a fixed diopter design. Once the lens power is set, the focal length cannot be adjusted at will. In some scenarios, such as those with presbyopia who need to dynamically adjust the focal length based on actual viewing distance, traditional glasses are difficult to adapt in real time.

[0003] Faced with this dilemma, the focusing function of liquid lens technology is particularly critical. However, existing liquid lenses have an obvious defect, which is that they are easily affected by external bumps and the direction of the lens, resulting in a significant decrease in imaging quality under these conditions. In some scenarios that require stable imaging, such as outdoor sports, mountaineering, cycling, etc., the liquid lens changes in acceleration, angle changes and other inertial force factors cause the lens shape to change, thereby affecting the imaging problem, which seriously limits the widespread application and development of liquid lenses. Therefore, the development of a liquid lens that can effectively resist external interference such as bumps and changes in direction is of great practical significance. Summary of the Invention

[0004] To solve at least one of the above problems, the present invention provides a liquid lens and its design and control method, as well as glasses. On the basis of realizing the zoom function, the design resists external interference and improves the imaging quality.

[0005] The present invention is achieved in that:

[0006] In a first aspect, the present invention provides a liquid lens, comprising:

[0007] Frames;

[0008] a first lens, the first lens being disposed on a first end of the frame;

[0009] a second lens, the second lens being disposed on the other end of the frame;

[0010] an elastic film disposed between the first lens and the second lens; and

[0011] A liquid is located between the first lens and the elastic membrane.

[0012] The elastic membrane has liquid on one side and no liquid on the other side.

[0013] The elastic membrane can be deformed between the first lens and the second lens under the action of liquid pressure, thereby changing the shape of the liquid and further changing the refractive power of the lens;

[0014] When the liquid lens is in a maximum diopter state, the elastic membrane is completely in contact with the first surface of the second lens;

[0015] When the liquid lens is in a minimum diopter state, the elastic membrane is completely in contact with the second surface of the first lens.

[0016] Furthermore, the shape and curvature of the second surface of the first lens are completely identical to the shape and curvature of the first surface of the elastic membrane in the minimum refractive power state.

[0017] Furthermore, the shape and curvature of the first surface of the second lens are completely identical to the shape and curvature of the second surface of the elastic membrane in the maximum refractive power state.

[0018] It should be noted that the above-mentioned completely aligned and identical area refers to the area of ​​the lens that mainly participates in light transmission and imaging, that is, the optically effective area. Outside this area, the shape of the lens is not strictly required.

[0019] In a second aspect, the present invention provides a method for designing a liquid lens, which determines the shape of the optical surface based on the shape of the elastic membrane.

[0020] The present invention provides a method for designing a liquid lens, which designs the shape of the second surface of a first lens according to the shape of the first surface of an elastic membrane in a state of minimum diopter;

[0021] The present invention provides a method for designing a liquid lens, which designs the shape of the first surface of a second lens according to the shape of the second surface of an elastic membrane in a state of maximum diopter.

[0022] The present invention provides a method for designing a liquid lens, comprising the following steps:

[0023] Step 1: Determine the curvature range required for the elastic membrane based on the required diopter range of the lens;

[0024] Step 2: According to the deformation law of the elastic film, the surface shape of the elastic film in the minimum diopter state and the maximum diopter state is obtained;

[0025] Step 3: Design the shape of the second surface of the first lens according to the shape of the first surface of the elastic membrane in the minimum diopter state; design the shape of the first surface of the second lens according to the shape of the second surface of the elastic membrane in the maximum diopter state;

[0026] Step 4: Determine the shape of the first surface of the first lens and the shape of the second surface of the second lens according to the basic refractive power of the lens;

[0027] Step 5: Adjust and optimize each lens surface according to the general optical system design method.

[0028] In step 1, the diopter change range

[0029] ΔF=(n1-n0)(κ max -κ min )

[0030] Where n1 is the refractive index of the liquid, n0 is the refractive index of the outside world, and κ is the curvature of the elastic membrane.

[0031] When the range of diopter variation is known and combined with the refractive index, the difference between the maximum curvature and the minimum curvature of the elastic membrane can be obtained.

[0032] Furthermore, according to the difference between the maximum curvature and the minimum curvature, the optimal curvature range is selected within the curvature range allowed by the elastic membrane.

[0033] Generally, the evaluation function P(κ) about the curvature can be determined according to the design requirements of the liquid lens, so that P(κ) is [κ min ,κ max ] has the highest value in the interval.

[0034] The design requirements of the liquid lens include that the elastic membrane has the most regular deformation within this range, falls within the elastic range, and is not prone to fatigue and aging.

[0035] In one embodiment, step 1 specifically includes:

[0036] Step 1.1, use the diopter formula ΔF = (n1-n0)(κ max -κ min ) calculate the difference between the maximum curvature and the minimum curvature of the elastic membrane;

[0037] Step 1.2, calculating the evaluation function P(κ) of the curvature according to the design requirements of the liquid lens;

[0038] Step 1.3, according to the difference between the maximum curvature and the minimum curvature, select different P(κ min ), calculate P(κ) in [κ min ,κ max ] and select the optimal curvature range.

[0039] In step 2, the shape of the elastic membrane is determined by mechanical laws. The deformation laws of the elastic membrane are determined through theoretical derivation, mechanical simulation, or experimental research, thereby obtaining the surface shapes of the elastic membrane in the minimum and maximum diopter states.

[0040] In step 3, when designing the shape of the second surface of the first lens, it should be ensured that the shape of the central main area thereof is identical to the shape of the first surface of the elastic membrane in the minimum diopter state;

[0041] When designing the shape of the first surface of the second lens, it should be ensured that the shape of its central main area is exactly the same as the shape of the second surface of the elastic membrane in the maximum diopter state;

[0042] For other areas, just ensure non-interference.

[0043] In step 4, the basic diopter

[0044] F0=(n2-n0)(κ 12 -κ 11 +κ 22 -κ 21 )

[0045] Where n2 is the refractive index of the lens. It is assumed here that the refractive index of the two lenses is the same. If they are different, they should be calculated separately. 11 for and κ 22 Determined by step 1.

[0046] When the basic refractive power variation range is known, combined with the refractive index, the curvature of the first surface of the first lens and the curvature of the second surface of the second lens can be obtained, and then the basic shapes of the two surfaces can be determined.

[0047] In one embodiment, step 4 specifically includes:

[0048] Step 4.1, use the diopter formula F0 = (n2-n0)(κ 12 -κ 11 +κ 22 -κ 21 ) calculate κ 11 and κ 22 difference;

[0049] Step 4.2: Calculate the evaluation function P(κ) of the curvature of the first surface of the first lens according to the design requirements of the liquid lens. 11 );

[0050] Step 4.3, select different Calculate P(κ 11 ) in [κ 11 ,κ 22 ] and select the optimal curvature range.

[0051] In step 5, the optimized variables include various surface parameters, and the optimization target includes imaging quality.

[0052] Taking into account the design requirements of various aspects such as imaging quality, application scenarios, cost and manufacturing process, through a large amount of theoretical calculations, simulation analysis and experimental verification, repeated optimization and adjustment are carried out to determine the shape of each surface.

[0053] Step 5 is generally optimized through simulation.

[0054] The present invention provides a design method for a liquid lens. Based on user optometry data, a human eye model with adjustable parameters is constructed to establish a mechanical-optical joint simulation system.

[0055] The present invention provides a design method for a liquid lens, which uses an elastic membrane to simulate a dynamic lens and realizes diopter adjustment through bidirectional transmission of pressure parameters.

[0056] The present invention provides a design method for a liquid lens, which is based on a dual-aspheric initial lens design and uses a damped least squares method to optimize the profile function and thickness to correct aberrations.

[0057] The present invention provides a liquid lens design method that combines imaging criteria and performs multi-objective optimization through weighted evaluation functions, MTF, and AXCL / DIMX operands, ultimately achieving adaptive lens system design that takes into account different usage scenarios.

[0058] In a third aspect, the present invention provides a method for controlling a liquid lens, characterized in that the required pressure is determined based on a mapping relationship between the refractive power and pressure of the liquid lens; in a maximum refractive power state or a maximum pressure, a pressure A is output; in a minimum refractive power state or a minimum pressure, a pressure B is output.

[0059] In one embodiment, the present invention provides a method for controlling a liquid lens, comprising the following steps:

[0060] Step 1: Obtain the required diopter of the lens and compare it with the maximum diopter and minimum diopter of the lens;

[0061] Step 2: Based on the comparison results, determine the output pressure according to the following conditions:

[0062] a) When the required diopter is greater than or equal to the maximum diopter, the output pressure is A;

[0063] b) When the required diopter is less than or equal to the minimum diopter, the output pressure is B;

[0064] c) When the required diopter is greater than the minimum diopter and less than the maximum diopter, the required pressure is determined according to a mapping relationship between the diopter of the liquid lens and the pressure.

[0065] In another embodiment, the present invention provides a method for controlling a liquid lens, comprising the following steps:

[0066] Step 1: Obtain the required diopter of the lens and determine the required pressure based on the mapping relationship between the diopter of the liquid lens and the pressure;

[0067] Step 2: Compare the required pressure with the maximum and minimum pressures, and determine the output pressure based on the following conditions:

[0068] a) When the required pressure is greater than or equal to the maximum pressure, the output pressure is A;

[0069] b) When the required pressure is less than or equal to the minimum pressure, the output pressure is B;

[0070] c) When the required pressure is greater than the minimum pressure and less than the maximum pressure, output directly.

[0071] The pressure A refers to the pressure that needs to be locked in the maximum diopter state, and its value is greater than the maximum diopter and the mapped pressure.

[0072] The pressure B refers to the pressure that needs to be locked in the minimum diopter state, and its value is smaller than the minimum diopter and the mapped pressure.

[0073] The mapping relationship between the diopter and pressure of the liquid lens refers to a one-to-one correspondence between the diopter and pressure determined during the design.

[0074] The mapping relationship between the diopter of the liquid lens and the pressure can be determined through simulation or experimental testing.

[0075] In common liquid lenses, pressure and diopter are simply mapped. This invention, however, provides a liquid lens control method that, at both the maximum and minimum diopter states, further adjusts the pressure, thereby altering the original balance between the internal force and pressure of the elastic membrane, allowing the elastic membrane to adhere tightly to the lens.

[0076] In a fourth aspect, the present invention provides a pair of glasses, characterized in that they include the liquid lens.

[0077] Specifically, the glasses include two lenses and a frame.

[0078] The present invention has at least the following beneficial effects:

[0079] The liquid lens provided by the present invention, through the structural design of the first lens and the second lens, enables the elastic membrane to obtain structural support in two extreme states, thereby strengthening the overall stability of the liquid lens in terms of physical structure, effectively reducing the fluctuation of optical performance caused by displacement or shaking of the elastic membrane, and making the imaging quality of the liquid lens in this state more reliable and stable.

[0080] The present invention provides a liquid lens, in which the protective effect of the lenses on both sides reduces the risk of external impact and contamination of the middle elastic membrane and liquid, thereby extending the service life of the entire glasses and reducing the frequency and cost of glasses replacement for users.

[0081] The present invention provides a design method for a liquid lens. While achieving the basic function of variable focus, the shapes of the lenses on both sides are determined based on the shape and curvature of the elastic membrane. When the elastic membrane is deformed to the extreme, it can be fixed to provide stable physical support, thereby suppressing interference from external forces and obtaining a more stable imaging effect.

[0082] This invention provides a liquid lens design method that leverages simulation technology to enable a solid-liquid composite structure to more effectively refract and converge light based on varying incident angles and visual requirements. The two side lenses provide a stable initial basis for light refraction, while the central liquid lens, through a feedback correction mechanism, finely adjusts the light, significantly reducing aberrations and improving visual quality.

[0083] The present invention provides a liquid lens design method that precisely calculates and designs the deformation patterns of an elastic membrane to determine the fixed positions and shape parameters of the two lenses. This not only provides stable physical support for the liquid lens but also, through precise optical parameter matching, limits deformation deviations during operation, significantly enhancing the stability of the liquid lens. This improved stability effectively reduces image quality degradation caused by factors such as liquid flow and environmental changes.

[0084] The present invention provides a control method for a liquid lens, which allows the elastic membrane to maintain a minimum state in a more stable form under the constraint of the lens, effectively avoiding the position deviation or abnormal deformation of the elastic membrane caused by unstable pressure, and provides a powerful control method for achieving stable operation of the liquid lens.

[0085] The glasses provided by the present invention can keep the liquid lens from being affected by inertial forces and gravity changes in scenes such as outdoor sports, making the imaging quality more reliable and stable.

[0086] The glasses provided by the present invention can keep the liquid lens from being affected by changes in the direction of gravity in scenarios such as lowering or raising the head, making the liquid lens more stable as a whole.

[0087] The glasses provided by the present invention can not only provide users with a clear and stable visual experience, but also expand the application scope of liquid lenses in more complex environments and promote technological development in related fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 is a side view of a liquid lens of the present invention;

[0089] Figure 2 is a cross-sectional view of a liquid lens of the present invention;

[0090] Figure 3 is a cross-sectional view of a liquid lens according to the present invention, wherein the elastic membrane is in a minimum refractive power state;

[0091] Figure 4 is a cross-sectional view of a liquid lens according to the present invention, wherein the elastic membrane is in a maximum refractive power state;

[0092] Figure 5 The figure is a schematic diagram of the three-dimensional structure of a pair of glasses according to the present invention.

[0093] in:

[0094] 1. Frame; 2. First lens; 21. First surface of the first lens; 22. Second surface of the first lens; 3. Second lens; 31. First surface of the second lens; 32. Second surface of the second lens; 4. Liquid; 5. Elastic membrane; 51. First surface of the elastic membrane; 52. Second surface of the elastic membrane; 6. Second chamber. DETAILED DESCRIPTION

[0095] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0096] See Figure 1-Figure 4 As a first embodiment of the present invention, a liquid lens is provided, comprising:

[0097] Frame 1;

[0098] A first lens 2, wherein the first lens 2 is provided on a first end of the frame 1;

[0099] A second lens 3, the second lens 3 is provided on the other end of the frame 1;

[0100] an elastic membrane 5 disposed between the first lens 2 and the second lens 3 ; and a liquid 4 located between the first lens 2 and the elastic membrane 5 .

[0101] When the liquid lens is in the maximum diopter state, the elastic membrane 5 is completely in contact with the first surface 31 of the second lens 3 in the optically effective area;

[0102] When the liquid lens is in the minimum diopter state, the elastic membrane 5 is completely in contact with the second surface 22 of the first lens 2 in the optically effective area.

[0103] In one embodiment, the elastic membrane 5 , the frame 1 and the edges of the first lens 2 are tightly connected to form a closed first chamber, which is filled with the liquid 4 .

[0104] In one embodiment, a chamber is formed between the elastic membrane 5 , the frame 1 and the second lens 3 , and the chamber is not filled with liquid.

[0105] In one embodiment, the second chamber 6 is filled with gas, a connecting hole is provided between the second chamber 6 and the outside to maintain the air pressure balance inside and outside the second chamber 6, and a filtering device is installed at the connecting hole.

[0106] In one embodiment, the second chamber 6 is in a vacuum state.

[0107] In one embodiment, the lens is made of transparent resin.

[0108] In one embodiment, the lens is made of glass.

[0109] In one embodiment, the liquid 4 is glycerin, silicone oil or other high refractive index liquid.

[0110] The elastic membrane 5 has good flexibility and elasticity, and can be deformed when the pressure of the liquid 4 changes, thereby changing the curvature of the liquid lens.

[0111] In one embodiment, the elastic film 5 may be made of polydimethylsiloxane.

[0112] In one embodiment, the frame 1 and the temples are made of plastic.

[0113] In one embodiment, the filtering device installed in the second chamber 6 formed between the elastic membrane 5, the frame 1 and the second lens 3 can be made of a high-efficiency filter material, and its pore size is precisely designed to effectively intercept dust, impurities, microorganisms and other substances in the outside air that may affect the purity of the second chamber 6, and only allow pure gas molecules to pass through, ensuring that the air entering the second chamber 6 always remains clean, thereby ensuring that the entire glasses structure can operate stably in various complex environments, avoiding problems such as performance degradation or component damage due to the intrusion of impurities.

[0114] In one embodiment, the lens may be manufactured by injection molding.

[0115] Using a high-precision mold customized according to the design method of the present invention, the appropriate material can be injected. Under precisely controlled temperature, pressure, and cooling conditions, the material quickly and evenly fills the mold cavity and ultimately solidifies into the lens shape that meets the design requirements, enabling large-scale, highly efficient production.

[0116] In another embodiment, the lens may be manufactured by mechanical processing means such as engraving and polishing.

[0117] For customized production scenarios involving special materials or requiring higher precision and surface quality, meticulous grinding and polishing processes can further optimize the flatness and smoothness of the lens surface, achieving extremely high optical quality standards. This processing method enables ultimate control over the lens shape and surface characteristics, meeting the stringent requirements of high-end optical products or specialized applications.

[0118] As a second embodiment of the present invention, a method for designing a liquid lens is further provided, comprising the following steps:

[0119] Step 1: According to the required diopter range of the lens and the optical diopter formula

[0120]

[0121] Determining the required curvature range of the elastic membrane when the range of diopter variation is known;

[0122] Step 2: obtaining the surface shape of the elastic membrane in the minimum diopter state and the maximum diopter state according to the deformation law of the elastic membrane;

[0123] Step 3: Design the shape of the second surface of the first lens according to the shape of the first surface of the elastic membrane in the minimum diopter state; design the shape of the first surface of the second lens according to the shape of the second surface of the elastic membrane in the maximum diopter state;

[0124] Step 4: Determine the shape of the first surface of the first lens and the shape of the second surface of the second lens according to the basic refractive power of the lens;

[0125] Step 5: Adjust and optimize each lens surface according to the general optical system design method.

[0126] Taking into account the design requirements of various aspects such as imaging quality, application scenarios, cost and manufacturing process, through a large amount of theoretical calculations, simulation analysis and experimental verification, repeated optimization and adjustment are carried out to determine the shapes of the first surface of the first lens and the second surface of the second lens.

[0127] Furthermore, step 1 includes:

[0128] Step 1.1, use the diopter formula ΔF = (n1-n0)(κ max -κ min ) calculates the difference between the maximum curvature and the minimum curvature of the elastic membrane.

[0129] Step 1.2: Calculate the evaluation function P(κ) of the curvature according to the design requirements of the liquid lens.

[0130] Step 1.3, according to the difference between the maximum curvature and the minimum curvature, select different P(κ min ), calculate P(κ) in [κ min ,κ max ] and select the optimal curvature range.

[0131] In step 2, a mathematical model is constructed through theoretical deduction. Through detailed analysis and precise calculation of various parameters in the model, the deformation trends of the elastic membrane under different conditions are sorted out.

[0132] Through mechanical simulation, the deformation scenes of the elastic membrane under the action of various force fields are simulated, the deformation process of the elastic membrane is observed, and deformation data is obtained.

[0133] Through experimental exploration, a series of highly targeted experiments were designed and carried out. Different degrees of force were applied to the elastic membrane, and its deformation was monitored and recorded in real time. The changes of the elastic membrane were verified, and the deformation law of the elastic membrane was obtained, thereby obtaining the surface shape of the elastic membrane in the minimum refractive power state and the maximum refractive power state.

[0134] Specifically, the mechanical simulation in step 2 can use software such as COMSOL or ANSYS.

[0135] Furthermore, step 4 includes:

[0136] Step 4.1, use the diopter formula F0 = (n2-n0)(κ 12 -κ 11 +κ 22 -κ 21 ) calculate κ 11 and κ 22 difference.

[0137] Step 4.2: Calculate the evaluation function P(κ) of the curvature of the first surface of the first lens according to the design requirements of the liquid lens. 11 ).

[0138] Step 4.3, select different Calculate P(κ 11 ) in [κ11 ,κ 22 ] and select the optimal curvature range.

[0139] As a third embodiment of the present invention, a method for controlling a liquid lens is further provided, comprising the following steps:

[0140] Step 1: Obtain the required diopter of the lens and compare it with the maximum and minimum diopter of the lens.

[0141] Step 2: Based on the comparison results, determine the output pressure according to the following conditions:

[0142] a) When the required diopter is greater than or equal to the maximum diopter, the output pressure is A;

[0143] b) When the required diopter is less than or equal to the minimum diopter, the output pressure is B;

[0144] c) When the required diopter is greater than the minimum diopter and less than the maximum diopter, the required pressure is determined based on the mapping relationship between the diopter of the liquid lens and pressure. The pressure A is the pressure required to lock in the maximum diopter state, and its value is greater than the maximum diopter and the mapped pressure.

[0145] The pressure B refers to the pressure that needs to be locked in the minimum diopter state, and its value is smaller than the minimum diopter and the mapped pressure.

[0146] The present invention has been described above with reference to preferred embodiments. However, it should be noted that those skilled in the art will readily appreciate that improvements and modifications may be made without departing from the technical principles of the present invention. The present invention is not limited to the preferred embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A liquid lens, characterized in that: include: Frames; a first lens, the first lens being disposed on a first end of the frame; a second lens, the second lens being disposed on the other end of the frame; an elastic membrane, the elastic membrane being provided between the first lens and the second lens; as well as a liquid located between the first lens and the elastic membrane; When the liquid lens is in a maximum diopter state, the elastic membrane is completely in contact with the first surface of the second lens in an optically effective area; When the liquid lens is in a minimum diopter state, the elastic membrane is completely in contact with the second surface of the first lens in the optically effective area.

2. The liquid lens according to claim 1, wherein: The shape and curvature of the first surface of the second lens are completely the same as the shape and curvature of the first surface of the elastic membrane in the maximum refractive power state.

3. The liquid lens according to claim 1, wherein: The shape and curvature of the second surface of the first lens are completely the same as the shape and curvature of the second surface of the elastic membrane in the minimum refractive power state.

4. A method for designing a liquid lens, characterized in that: include: Step 1: Determine the curvature range required for the elastic membrane based on the required diopter range of the lens; Step 2: According to the deformation law of the elastic film, the surface shape of the elastic film in the minimum diopter state and the maximum diopter state is obtained; Step 3: Designing the shape of the second surface of the first lens according to the shape of the first surface of the elastic membrane in the minimum diopter state; designing the shape of the first surface of the second lens according to the shape of the second surface of the elastic membrane in the maximum diopter state; Step 4: Determine the shape of the first surface of the first lens and the shape of the second surface of the second lens according to the basic refractive power of the lens; Step 5: Adjust and optimize each lens surface according to the general optical system design method.

5. The method for designing a liquid lens according to claim 4, wherein: In step 3, when designing the shape of the second surface of the first lens, it should be ensured that the shape of its central main area is exactly the same as the shape of the first surface of the elastic membrane in the minimum refractive power state; when designing the shape of the first surface of the second lens, it should be ensured that the shape of its central main area is exactly the same as the shape of the second surface of the elastic membrane in the maximum refractive power state.

6. The method for designing a liquid lens according to claim 4, wherein: Step 1 includes: Step 1.1, use the diopter formula ΔF = (n1-n0)(κ max -κ min ) calculate the difference between the maximum curvature and the minimum curvature of the elastic membrane; Step 1.2, calculating the evaluation function P(κ) of the curvature according to the design requirements of the liquid lens; Step 1.3, according to the difference between the maximum curvature and the minimum curvature, select different P(κ min ), calculate P(κ) in [κ min ,κ max ] and select the optimal curvature range.

7. The method for designing a liquid lens according to claim 4, wherein: Step 4 includes: Step 4.1, use the diopter formula F0 = (n2-n0)(κ 12 κ 11 +κ 22 -κ 21 ) calculate κ 11 and κ 22 difference; Step 4.2: Calculate the evaluation function P(κ) of the curvature of the first surface of the first lens according to the design requirements of the liquid lens. 11 ); Step 4.3, select different Calculate P(κ 11 ) in [κ 11 ,κ 22 ] and select the optimal curvature range.

8. A method for controlling a liquid lens, characterized in that: The required pressure is determined based on the mapping relationship between the refractive power and pressure of the liquid lens; in the maximum refractive power state or the maximum pressure, the output pressure A is; in the minimum refractive power state or the minimum pressure, the output pressure B is.

9. A method for controlling a liquid lens, characterized in that: The following steps are involved: Step 1: Obtain the required diopter of the lens and compare it with the maximum diopter and minimum diopter of the lens; Step 2: Based on the comparison results, determine the output pressure according to the following conditions: a) When the required diopter is greater than or equal to the maximum diopter, the output pressure is A; b) When the required diopter is less than or equal to the minimum diopter, the output pressure is B; c) When the required diopter is greater than the minimum diopter and less than the maximum diopter, the required pressure is determined according to a mapping relationship between the diopter of the liquid lens and the pressure.

10. A pair of glasses, characterized in that: The invention comprises the liquid lens according to any one of claims 1 to 3, and a lens frame.

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