Aspheric liquid lens capable of adjusting focal length based on fluid flow velocity

Abstract

The invention discloses an aspherical liquid lens capable of adjusting focal length based on fluid flow velocity. The aspherical liquid lens comprises a first transparent packaging piece and a second transparent packaging piece, at least one of the two transparent packaging pieces is an elastic body which is deformed under stress; a liquid storage cavity for accommodating an optical liquid medium is formed between the two transparent packaging pieces; the internal structure of the liquid storage cavity is constructed as follows: when the optical liquid medium circulates in the liquid storage cavity, the flow rates of the optical liquid medium flowing through all positions of the liquid side of the transparent packaging piece are inconsistent, and the flow rates of the fluid form a non-uniformly distributed liquid side pressure effect on the transparent packaging piece, so that the transparent packaging piece formed by the elastic body generates non-uniform deformation. The non-uniformly distributed liquid side pressure effect is formed on the uniform or non-uniform transparent packaging piece through the internal structure of the liquid storage cavity by the fluid flow speed, the surface type of the non-spherical liquid lens is controlled by the fluid flow speed, focal length adjustment is achieved, and the non-spherical liquid lens has the advantages of being simple in structure, simple in preparation process, convenient to use, good in imaging effect and the like.

Description

Technical Field

[0001] The invention relates to the technical field of optical imaging, and in particular to an aspherical liquid lens that adjusts focal length based on fluid flow rate. Background Art

[0002] In recent years, meeting the requirements of compact structure, fast zoom response, and high imaging quality has gradually become the development direction and trend of optical zoom systems. The liquid lens technology, inspired by the structure of the human eye, can achieve controllable focal length by changing the surface morphology, that is, the lens surface shape. Its compact structure and large zoom capability provide a solution for mobile electronic devices, intraocular lenses, and micro-optical systems.

[0003] At present, liquid lenses are mainly divided into two categories: reflective and transmissive. Reflective liquid lenses are mainly used in large astronomical telescopes, while transmissive liquid lenses are the focus of research in the industry. According to different application mechanisms, transmissive liquid lenses are mainly divided into three types:

[0004] Gradient refractive index lens: It changes the voltage applied to the liquid crystal by physical or chemical methods to adjust the refractive index of the liquid crystal and achieve zoom. The gradient refractive index lens has high resolution and low control voltage, so it is easy to realize array; but its disadvantages are also obvious: it is sensitive to ambient temperature, has a small zoom range, and the non-uniformity of the liquid crystal in the electric field will cause large optical distortion, resulting in poor imaging quality.

[0005] Electrowetting effect lens: It controls the surface shape of the droplet by changing the voltage. More precisely, it controls the wetting characteristics of the liquid on the solid surface by changing the applied voltage at the liquid-solid interface, thereby changing the contact angle of the droplet, so that it can change the curvature to achieve zoom like the lens of the human eye. At the same time, the surface curvature will change with different applied voltages, thereby achieving optical zoom, thereby achieving the expected zoom range.

[0006] Liquid-filled lens: This lens changes the curvature of the lens surface by pumping in and out liquid. A mechanical device is used to apply pressure to the liquid, so that the liquid is redistributed within the device, changing the curvature radius of the lens. This type of liquid-filled lens has low drive power consumption, flexible lens aperture size, and a large zoom range. However, when the lens is large, it is more sensitive to vibration and gravity, and has a more complex structure.

[0007] One of the main ways to construct a liquid lens is to use elastic transparent parts to encapsulate optical liquids and change the shape of the elastic parts into different shapes by changing the pressure on the elastic parts. A type of aspherical liquid lens obtained by encapsulating optical liquids with non-uniform elastic transparent parts can greatly improve the optical performance of the lens and the imaging quality. However, the difficulties in preparing non-uniform elastic transparent parts, integrating them with liquid lenses, and the limited focusing range have led to difficulties in their promotion and application. Summary of the invention

[0008] The present invention aims to solve at least one of the technical problems existing in the related art to a certain extent. To this end, the present invention provides an aspheric liquid lens with focal length adjusted based on fluid flow rate. The surface shape of the aspheric liquid lens is controlled by the fluid flow rate to achieve focal length adjustment. The structure is simple, the preparation process is simple, and it is easy to use.

[0009] In order to achieve the above-mentioned object, the present invention provides, on one hand, an aspherical liquid lens for adjusting focal length based on fluid flow rate, comprising a first transparent encapsulation member and a second transparent encapsulation member;

[0010] At least one of the two transparent packaging parts is an elastic body that is deformed by force;

[0011] A liquid storage cavity for accommodating an optical liquid medium is provided between the two transparent packaging members; the liquid storage cavity is provided with at least one liquid injection port and at least one liquid discharge port, and the liquid injection port is driven by an external driving device to inject or suck out the optical liquid medium into the liquid storage cavity;

[0012] The internal structure of the liquid storage chamber is constructed as follows: when the optical liquid medium flows in the liquid storage chamber, the flow rate passing through the liquid side of the transparent package is inconsistent, and the fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the transparent package, causing the transparent package composed of an elastomer to undergo non-uniform deformation.

[0013] A further preferred technical solution of the present invention is that a first hollow tube is arranged between the first transparent encapsulation member and the second transparent encapsulation member, and the first transparent encapsulation member and the second transparent encapsulation member respectively cover the openings at both ends of the first hollow tube;

[0014] The inner cavity of the first hollow tube serves as a liquid storage cavity.

[0015] Preferably, at least one partition having the same shape as the opening of the first hollow tube is disposed in the first hollow tube, the partition divides the liquid storage cavity into an injection cavity and a discharge cavity, the injection port is disposed in the injection cavity, the discharge port is disposed in the discharge cavity, and the discharge cavity is located on one side of the nearly transparent package;

[0016] The central opening of the partition serves as the main hole. With the main hole as the center, the surface of the partition is divided into a number of annular areas, each of which is provided with a number of sub-holes, and the apertures or numbers of the sub-holes provided in different annular areas are inconsistent; the main hole and the sub-holes together constitute a through-hole array, and after the optical liquid medium flows through the through-hole array, the fluid flow rate at each location undergoes inconsistent changes.

[0017] Preferably, the number of the partitions is consistent with the number of the transparent packaging components made of elastomer.

[0018] Preferably, the main hole and the sub-hole on the partition are circular, square or polygonal.

[0019] Preferably, the sub-holes on the partition are distributed around the main hole, and the diameters of the sub-holes increase or decrease from the center to the outside.

[0020] Preferably, the diameters of the sub-pores in each annular region are consistent, and the density of the sub-pores distributed in each annular region is from dense to sparse or from sparse to dense from the center to the outside.

[0021] Preferably, a second hollow tube is nested in the first hollow tube, at least one end of the second hollow tube is open, and the open end faces the transparent packaging member made of elastic body; the liquid injection port is connected to the inner cavity of the second hollow tube, and the liquid discharge port is connected to the chamber outside the second hollow tube and inside the first hollow tube;

[0022] The optical liquid medium flows through the transparent package, and the fluid flow rate at the position directly opposite to the opening end of the second hollow tube is inconsistent with that at the position not directly opposite to the opening end of the hollow tube. The fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the transparent package, causing the transparent package composed of an elastomer to undergo non-uniform deformation.

[0023] Preferably, the first transparent encapsulation member is made of an elastic body, and the second transparent encapsulation member is made of a non-elastic body;

[0024] A transparent, nonporous curved body is disposed on the liquid side of the second transparent packaging member;

[0025] The optical liquid medium flows through the curved surface, and under the action of the curved surface, the flow velocity of the fluid at different locations undergoes inconsistent changes.

[0026] Preferably, the aspheric liquid lens is used in combination with another aspheric liquid lens, and the first transparent packaging components of the two aspheric liquid lenses are close to each other and connected by a sleeve.

[0027] Preferably, the first hollow tube is a transparent circular tube, a square tube or a polygonal tube.

[0028] Preferably, the first transparent encapsulation member and the second transparent encapsulation member are both made of elastic body, the edges of the first transparent encapsulation member and the second transparent encapsulation member are in direct contact, and the inner cavity surrounded by the two transparent encapsulation members serves as the liquid storage cavity;

[0029] The liquid injection port and the liquid discharge port are respectively located at edge positions of the first transparent encapsulation member and the second transparent encapsulation member.

[0030] Preferably, a partition is provided along the joint position of the two transparent packaging members, the partition divides the liquid storage cavity into two parts, a liquid injection cavity and a liquid discharge cavity, the liquid injection port is provided in the liquid injection cavity, and the liquid discharge port is provided in the liquid discharge cavity;

[0031] The central opening of the partition serves as the main hole. With the main hole as the center, the surface of the partition is divided into a number of annular areas, each of which is provided with a number of sub-holes, and the apertures or numbers of the sub-holes provided in different annular areas are inconsistent; the main hole and the sub-holes together constitute a through-hole array, and after the optical liquid medium flows through the through-hole array, the fluid flow rate at each location undergoes inconsistent changes.

[0032] Preferably, the main hole and the sub-hole on the partition are circular, square or polygonal.

[0033] Preferably, the sub-holes on the partition are distributed around the main hole, and the diameters of the sub-holes increase or decrease from the center to the outside.

[0034] Preferably, the diameters of the sub-pores in each annular region are consistent, and the density of the sub-pores distributed in each annular region is from dense to sparse or from sparse to dense from the center to the outside.

[0035] Preferably, the refractive index of the first transparent encapsulation member and the second transparent encapsulation member is the same as or close to the refractive index of the optical liquid medium.

[0036] Preferably, the optical liquid medium is inorganic silicone oil, deionized water or sodium chloride solution.

[0037] Preferably, the optical liquid medium is a UV curing adhesive, and after the liquid lens forms an aspheric surface, it is irradiated with UV light to be cured into a solid aspheric lens.

[0038] Preferably, the number of the liquid injection ports and the liquid discharge ports is equal or unequal.

[0039] Beneficial effects: The present invention designs a novel aspheric liquid lens structure that adjusts the focal length by fluid flow rate. The structure comprises a first transparent package, a liquid storage chamber and a second transparent package to form a sandwich structure. The fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the uniform or non-uniform transparent package through the internal structure of the liquid storage chamber to form an aspheric liquid lens. The surface shape of the aspheric liquid lens is controlled by the fluid flow rate to achieve focal length adjustment. The structure has the advantages of simple structure, simple preparation process, easy use and good imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0041] Figure 2 It is a top view of the structure of embodiment 1 of the present invention.

[0042] Figure 3 It is a schematic diagram of the working principle of the convex lens in Example 1 of the present invention.

[0043] Figure 4 It is a schematic diagram of the working principle of the concave lens formed in Example 1 of the present invention.

[0044] Figure 5 It is a structural diagram of embodiment 3 of the present invention.

[0045] Figure 6 It is a schematic diagram of the structure of embodiment 4 of the present invention.

[0046] Figure 7 It is a structural diagram of embodiment 5 of the present invention.

[0047] Figure 8 It is a structural diagram of embodiment 6 of the present invention.

[0048] Fig. 9 It is a structural diagram of Example 7 of the present invention.

[0049] Fig.10 It is a schematic diagram of the working principle of the convex lens in Example 7 of the present invention.

[0050] Fig.11 It is a schematic diagram of the working principle of the concave lens formed in Example 8 of the present invention.

[0051] Fig.12 It is a structural diagram of Example 9 of the present invention.

[0052] Fig.13 It is a top view of the structure of Example 9 of the present invention.

[0053] Fig.14 It is a schematic diagram of the working principle of the convex lens in Example 9 of the present invention.

[0054] Fig.15 It is a schematic diagram of the working principle of the concave lens constructed in embodiment 10 of the present invention.

[0055] Fig.16 It is a top view of the structure of embodiment 11 of the present invention.

[0056] Fig.17 It is a top view of the structure of embodiment 12 of the present invention.

[0057] Fig.18 It is a schematic diagram of the structure of embodiment 13 of the present invention.

[0058] Fig.19 It is a schematic diagram of the working principle of the convex lens constructed in Example 13 of the present invention.

[0059] Fig. 20 It is a schematic diagram of the working principle of the concave lens constructed in Example 14 of the present invention.

[0060] Fig.21 It is a structural diagram of embodiment 15 of the present invention.

[0061] Fig. 22 It is a structural diagram of embodiment 16 of the present invention.

[0062] Fig.23 It is a structural diagram of embodiment 17 of the present invention.

[0063] Description of reference numerals:

[0064] 1: first transparent packaging member, 2: liquid storage chamber, 2-1: liquid injection chamber, 2-2-liquid discharge chamber, 3: second transparent packaging member, 4: partition, 4-1-through hole array, 5: liquid injection port, 6: liquid discharge port, 7: optical liquid, 8: sleeve. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments, and they should not be understood as limitations on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms used are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0066] Combine the following Figure 1-Figure 23 The present invention describes an aspheric liquid lens that adjusts focal length based on fluid flow rate.

[0067] Embodiment 1: This embodiment provides an aspherical liquid lens for adjusting focal length based on fluid flow rate. It includes:

[0068] Reference Figure 1 , Figure 2 , including a first transparent encapsulation member 1 and a second transparent encapsulation member 3 which are formed of an elastic body that is deformed when subjected to force, and a first hollow tube is arranged between the first transparent encapsulation member 1 and the second transparent encapsulation member 3.

[0069] The first hollow tube is a hollow cylindrical tube with a radius of 30 mm and a height of 40 mm, and its material is high borosilicate glass; the first transparent packaging member 1 and the second transparent packaging member 3 are uniform transparent elastic films with a radius of 30 mm and a thickness of 0.1 mm sealed on the upper and lower end surfaces of the first hollow tube, and their material is preferably PDMS (polydimethylsiloxane).

[0070] The inner cavity of the first hollow tube serves as the liquid storage cavity 2. Two partitions 4 are arranged in the first hollow tube. The two partitions 4 divide the liquid storage cavity 2 into an injection cavity 2-1 and two drainage cavities 2-2. The drainage cavity 2-2 is located on both sides of the injection cavity 2-1. The injection cavity 2-1 has an injection port 5, and the two drainage cavities 2-2 each have a drainage port 6. The central opening of the partition 4 serves as the main hole. With the main hole as the center, the surface of the partition 4 is divided into a plurality of annular areas. Each annular area has a plurality of sub-holes. The main hole and the sub-holes together constitute a through hole array 4-1.

[0071] The radius of the partition 4 is 30mm, the thickness is 1mm, and its material is high borosilicate glass. The radius of the main hole of the through hole array 4-1 is 9mm, the radius of the first-level sub-hole is 7mm, and the radius of the second-level sub-hole is 5mm. The outer layer of the sub-holes is denser. The radius of the injection port 5 is 3mm, and the radius of the discharge port 6 is 1.5mm. The optical liquid medium filled in the liquid storage is propyl silicone oil (C3H4Cl3F3Si), and its refractive index matches the refractive index of the partition 4.

[0072] While working:

[0073] like Figure 3 As shown, the external driving device injects the optical liquid 7 into the liquid filling cavity 2-1 through the liquid filling port 5, flows into the liquid discharge cavity 2-2 through the array through holes of the partition 4 and flows out of the cavity from the liquid discharge port 6. The liquid side pressure effect generated by the fluid flow rate on the elastic film of the first transparent package 1 and the second transparent package 3 causes it to be subjected to non-uniform stress, thereby deforming to form an aspherical liquid lens.

[0074] like Figure 4As shown, the external driving device draws the optical liquid 7 out of the liquid injection port 5, changing the flow direction of the optical liquid 7 in the liquid storage chamber 2. The atmospheric pressure will produce a reaction force on the elastic film of the first transparent package 1 and the second transparent package 3, and the film will be concave inward. The whole device constitutes a concave lens. By adjusting the speed of the driving device to draw liquid, the degree of deformation of the film can be controlled, thereby changing the surface parameters, widening the focusing range, and effectively increasing the application scenarios of the device.

[0075] Example 2: On the basis of the above-mentioned Example 1, the optical liquid 7 filled in the liquid storage chamber 2 is changed, and its material is preferably deionized water (H2O), and the effective aperture of the liquid lens is limited to the size of the main hole, which can avoid the influence of the refractive index mismatch between the partition 4 and the optical liquid 7 and reduce the manufacturing cost of the liquid lens.

[0076] Embodiment 3: Based on the above embodiment 1, Figure 5 As shown, two symmetrical injection ports 5 are provided on the side wall of the injection cavity 2-1, and two symmetrical discharge ports 6 are provided on the side wall of the discharge cavity 2-2. The radii of the injection ports 5 and the discharge ports 6 are 3 mm and 1.5 mm respectively, and adjacent injection ports 5 and discharge ports 6 are orthogonal to each other.

[0077] During operation: the external driving device injects the optical liquid 7 into the injection cavity 2-1 from different directions through the injection port 5. As the number of the discharge ports 6 and the injection ports 5 changes, the adjustable variables of the liquid lens increase, the surface shape formed by the elastic film will be richer, and the focal length adjustment will be more precise.

[0078] Embodiment 4: Based on the above embodiment 3, Figure 6 As shown, the main hole radius of the through hole array 4-1 is adjusted to 5 mm, the primary sub-hole radius is 7 mm, and the secondary sub-hole radius is 9 mm, and the outermost sub-holes are denser.

[0079] During operation, the driving device injects the optical liquid 7 into the injection chamber 2-1 from different directions through the injection port 5. As the radius of the array through holes of the partition 4 changes, the adjustable variables of the liquid lens increase, the surface shape formed by the elastic film will be richer, the focal length adjustment of the lens will be more precise, and the application range will be wider.

[0080] Embodiment 5: Based on the above embodiment 3, Figure 7 As shown, the radius of the main hole of the through hole array 4-1 is changed to 9mm, and the diameters of the primary and secondary sub-apertures are equal, both 5mm, and the outer sub-apertures are sparser; when working, the driving device injects the optical liquid 7 into the injection cavity 2-1 through the injection port 5 from different directions. Due to the changes in the through hole array 4-1 and the sub-hole arrangement of the partition 4, the adjustable variables of the liquid lens increase, the surface shape formed by the transparent elastic film will be richer, the focal length adjustment will be more precise, the process difficulty of processing and manufacturing will be reduced, and the application range will be wider.

[0081] Embodiment 6: Based on the above embodiment 3, Figure 8 As shown, the shape of the liquid storage chamber 2 changes from a circle to a rectangle, with a side length of 50 mm and a height of 40 mm, and the material is preferably high borosilicate glass; the upper and lower end surfaces of the liquid storage chamber 2 are sealed with a uniform transparent elastic film with a side length of 50 mm and a thickness of 0.1 mm, and the material is preferably polyimide (Polyimide); two identical partitions 4 with through hole arrays 4-1 divide the liquid storage chamber 2 into an injection chamber 2-1 and a discharge chamber 2-2, and the side length of the partition 4 is 50 mm m, with a thickness of 1mm, and its material is preferably high borosilicate glass. The main hole of the through hole array 4-1 is a rectangle with a side length of 9mm, the first-level sub-hole is a rectangle with a side length of 7mm, and the second-level sub-hole is a rectangle with a side length of 3mm. The outer sub-holes are more densely distributed. Two injection ports 5 and discharge ports 6 are respectively provided on the side walls of the injection cavity 2-1 and the discharge cavity 2-2, with radii of 3mm and 1.5mm respectively. The optical liquid 7 filled in the liquid storage cavity 2 is preferably methyl silicone oil, and its refractive index matches that of the partition 4.

[0082] When working, the external drive device injects the optical liquid 7 into the liquid injection cavity 2-1 through the liquid injection port 5, flows into the liquid discharge cavity 2-2 through the array through holes of the partition plate 4, and flows out of the cavity from the liquid discharge port 6. The liquid side pressure effect generated by the fluid flow rate on the elastic film causes it to be subjected to non-uniform stress, thereby deforming to form an aspherical liquid lens. By adjusting the speed of the liquid injection of the drive device, the degree of deformation of the film can be controlled, thereby changing the aspherical surface parameters and widening the focusing range. The rectangular design can also increase the scope of application of the device.

[0083] Embodiment 7: Based on the above embodiment 1, Fig. 9 As shown, the second transparent packaging member 3 is replaced by a transparent non-elastic plate with a radius of 30 mm and a thickness of 1 mm, and the material is an acrylic plate; the liquid storage chamber 2 is divided into an injection chamber 2-1 and a discharge chamber 2-2 by a partition 4 with a through hole array 4-1, and the injection chamber 2-1 has an injection port 5, and the discharge chamber 2-2 has a discharge port 6; the optical liquid 7 filled in the liquid storage chamber 2 is a sodium chloride solution, and its refractive index matches that of the partition 4.

[0084] When working, Fig.10As shown, the external drive device injects the optical liquid 7 into the liquid injection chamber 2-1 through the liquid injection port 5. Due to the blocking effect of the partition 4, the optical liquid 7 can only flow into the liquid discharge chamber 2-2 from the through hole array 4-1 of the partition 4 and exert force on the top film. As the through hole radius decreases from the center to the surroundings, the non-uniform stress on the film gradually decreases from the center to the surroundings, thereby deforming to form an aspherical surface. The entire device constitutes an aspherical liquid lens, which can effectively eliminate spherical aberration. By adjusting the flow rate of the liquid drive device, the degree of deformation of the film can be controlled, thereby changing the aspherical surface parameters and widening the focusing range.

[0085] Embodiment 8: Based on the above embodiment 7, Fig.11 As shown, the flow direction of the optical liquid 7 in the liquid storage chamber 2 is changed, and the optical liquid 7 is pumped out from the liquid injection port 5 by an external driving device. The atmospheric pressure will produce a reaction force on the elastic film that is different from that in Example 7. The film is concave downward, and the entire device constitutes a concave lens. The speed at which the driving device pumps liquid can be adjusted to control the degree of deformation of the film, thereby changing the surface parameters, widening the focusing range, and effectively increasing the application scenarios of the device.

[0086] Embodiment 9: Based on the above embodiment 7, Fig.12 , Fig.13 As shown, the partition 4 with the through hole array 4-1 is changed into a second hollow tube concentric with the first hollow tube, with a radius of 15mm, a height of 38mm, and a material of acrylic (PMMA), then the liquid storage chamber 2 is divided into two layers: the inner cavity is the liquid injection chamber 2-1, and the outer cavity is the liquid discharge chamber 2-2. The side wall of the liquid discharge chamber 2-2 is provided with three circular liquid discharge ports 6 with an angle of 120° to each other, and the radius is 1.5mm; the side wall of the liquid injection chamber 2-1 is provided with a circular liquid injection port 5, which is located on the angle bisector of two adjacent liquid discharge ports 6, and the radius is 3mm; the optical liquid 7 filled in the liquid storage chamber 2 is preferably a 30% concentration sodium chloride solution, which can greatly reduce the freezing point of the optical liquid 7 and increase the applicable environment of the liquid lens device.

[0087] When working, Fig.14 , the injection port 5 and the drainage chamber 2-2 are not interconnected, the external drive device injects the optical liquid 7 into the injection chamber 2-1 through the injection port 5, and then flows into the drainage chamber 2-2 and is discharged from the drainage port 6. The film is subjected to non-uniform stress that gradually decreases from the center to the surroundings, thereby deforming to form an aspherical surface. The entire device constitutes an aspherical liquid lens, which can effectively eliminate spherical aberration. By adjusting the flow rate of the liquid drive device, the degree of deformation of the film can be controlled, thereby changing the aspherical surface parameters and widening the focusing range.

[0088] Embodiment 10: Based on the above embodiment 9, Fig.15As shown, the flow direction of the optical liquid 7 in the liquid storage chamber 2 is changed, and the optical liquid 7 is pumped out from the liquid injection port 5 by an external driving device. The atmospheric pressure will produce a reaction force on the elastic film that is different from that in Example 9. The film is concave downward, and the entire device constitutes a concave lens. The speed at which the driving device pumps liquid can be adjusted to control the degree of deformation of the film, thereby changing the surface parameters, widening the focusing range, and effectively increasing the application scenarios of the device.

[0089] Embodiment 11: Based on the above embodiment 9, Fig.16 As shown, the shape of the liquid storage chamber 2 is changed from a circle to a rectangle, with a side length of 50mm and a thickness of 1mm, and its material is preferably high borosilicate glass; the side length of the drainage chamber 2-2 is 50mm and the height is 30mm, and the side length of the injection chamber 2-1 is 30mm and the height is 28mm; the side length of the first transparent package 1 is 50mm and the thickness is 0.1mm, and the film material is PDMS (polydimethylsiloxane); the side walls of the injection chamber 2-1 and the drainage chamber 2-2 are respectively provided with two symmetrical circular injection ports 5 and drainage ports 6, whose radii are 3mm and 1.5mm respectively, and adjacent injection ports 5 and drainage ports 6 are orthogonal to each other.

[0090] During operation, the external drive device injects the optical liquid 7 into the liquid injection port 5, and the optical liquid 7 flows from the liquid injection chamber 2-1 into the liquid discharge chamber 2-2 and is discharged from the liquid discharge port 6. The film is subjected to non-uniform stress that gradually decreases from the center to the surroundings, thereby deforming to form an aspherical surface. The entire device constitutes an aspherical liquid lens, which can effectively eliminate spherical aberration. By adjusting the flow rate of the liquid drive device, the degree of deformation of the film can be controlled, thereby changing the aspherical surface parameters and widening the focusing range.

[0091] Embodiment 12: Based on the above embodiment 9, Fig.17 As shown, by increasing the number of liquid injection ports 5, the liquid lens device changes due to the number of liquid discharge ports 6 and liquid injection ports 5, the adjustable variables increase, the surface shape formed by the first transparent package 1 on the upper end face will be richer, and the focal length adjustment will be more precise on the basis of effectively eliminating spherical aberration.

[0092] Embodiment 13: Based on the above embodiment 7, Fig.18 As shown, the partition 4 with the through hole array 4-1 is changed into a transparent non-porous curved surface body, and is sunk and placed on a transparent non-elastic plate, and its shape is like a spherical crown, and the injection cavity 2-1 and the discharge cavity 2-2 are integrated. At this time, it is equivalent to sealing a transparent non-porous spherical crown-shaped obstacle with a height of 18mm and a bottom length of 40mm on the lower end surface of the liquid storage cavity 2, and its shell thickness is 1mm, and the material is preferably high borosilicate glass; the liquid storage cavity 2 is filled with an optical liquid 7, and the obstacle is filled with an auxiliary liquid. The optical liquid 7 and the auxiliary liquid are preferably inorganic silicone oil and sodium chloride solution.

[0093] When working, Fig.19 As shown, an external driving device is connected between the liquid injection port 5 and the liquid discharge port 6 to make the optical liquid 7 circulate in the liquid storage chamber 2. Due to the fluid pressure and the blocking effect of the lower end surface obstacle, the transparent elastic film is subjected to non-uniform stress that gradually decreases from the center to the surroundings, forming an aspherical surface shape, so that the entire device constitutes an aspherical liquid lens, which can effectively eliminate spherical aberration. By adjusting the flow rate of the liquid driving device, the degree of deformation of the film can be controlled, thereby changing the aspherical surface parameters and widening the focusing range.

[0094] Embodiment 14: Based on the above embodiment 13, Fig. 20 As shown, if the flow direction of the optical liquid 7 in the liquid storage chamber 2 is changed, and the liquid is pumped out from the liquid injection port 5 by an external driving device, due to the pressure difference between the inside and the outside, the transparent elastic film is subjected to downward pressure, causing it to be concave toward the lower end surface of the liquid storage chamber, so that the entire device constitutes a concave lens, thereby broadening the application scope of the present invention.

[0095] Embodiment 15: Based on the above embodiment 13, Fig.21 As shown, two identical liquid lenses are stacked vertically facing each other, and the two lenses are fixed by a cylindrical sleeve 8. The sleeve material is preferably rubber. The two lenses are combined together to form an aspherical liquid lens.

[0096] When working, an external driving device is connected between the liquid injection port 5 and the liquid discharge port 6 of the two lenses, and the optical liquid 7 circulates between the two main cavities to form a concave-convex combination lens to correct spherical aberration. If the two lens main cavities are filled with liquids with different refractive indices, achromatism can also be achieved, which greatly increases the scope and application field of this lens.

[0097] Embodiment 16: Based on the above embodiment 1, Fig. 22 As shown, the first hollow tube is cancelled and a partition 4 with a through-hole array 4-1 is retained, then the liquid lens device consists of a first transparent package 1, a partition 4 and a second transparent package 3; the radius of the first transparent package 1 and the second transparent package 3 is 30mm, the thickness is 1mm, and the material is PDMS (polydimethylsiloxane Polydimethylsiloxane) and polyimide (Polyimide); the radius of the partition 4 is 30mm, the thickness is 1mm, and the material is high borosilicate glass; a liquid injection port 5 with a radius of 2mm is opened on the side wall of the first transparent package 1, and a liquid discharge port 6 with a radius of 1.5mm is opened on the side wall of the second transparent package 3; when working, the external drive device injects the optical liquid 7 through the liquid injection port 5 and then discharges it through the liquid discharge port 6, the fluid flow rate forms a liquid side pressure effect on the elastic member, and the degree of deformation of the elastic member can be controlled by adjusting the liquid injection speed of the drive device, thereby changing the surface parameters of the liquid lens and widening the focusing range.

[0098] Embodiment 17: Based on the above embodiment 16, Fig.23 As shown, the partition plate 4 with the through hole array 4-1 is also removed, and the second transparent encapsulation member 3 is replaced by a transparent non-elastic member, and a liquid injection port 5 and a liquid discharge port 6 are opened on the side wall of the second transparent encapsulation member 3;

[0099] During operation, the external driving device injects the optical liquid 7 through the liquid injection port 5 and discharges it through the liquid discharge port 6. The fluid flow rate forms a liquid side pressure effect on the first transparent packaging member 1. By adjusting the liquid injection speed of the driving device, the degree of deformation of the elastic member can be controlled, thereby changing the surface parameters of the liquid lens and widening the focusing range.

[0100] Embodiment 18: On the basis of the above-mentioned embodiment 17, the optical liquid 7 is replaced with a transparent UV curing glue; when working, the external driving device injects the transparent UV curing glue through the liquid injection port 5 and discharges it through the liquid discharge port 6. The fluid flow rate forms a liquid side pressure effect on the elastic member, and the first transparent packaging member 1 on the top undergoes elastic deformation to form an aspheric surface shape. According to the needs of use, the transparent UV curing glue can be UV-cured under the surface matching condition to make it an aspheric lens. The liquid injection speed of the driving device can be adjusted to change the surface parameters of the liquid lens to obtain various required aspheric lenses, which greatly reduces the complexity of the liquid lens device and improves the convenience and versatility of use.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aspherical liquid lens for adjusting focal length based on fluid flow rate, characterized in that: comprising a first transparent encapsulation member and a second transparent encapsulation member; At least one of the two transparent packaging parts is an elastic body that is deformed by force; A liquid storage cavity for accommodating an optical liquid medium is provided between the two transparent packaging members; the liquid storage cavity is provided with at least one liquid injection port and at least one liquid discharge port, and the liquid injection port is driven by an external driving device to inject or suck out the optical liquid medium into the liquid storage cavity; The internal structure of the liquid storage chamber is constructed as follows: when the optical liquid medium flows in the liquid storage chamber, the flow rate passing through the liquid side of the transparent package is inconsistent, and the fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the transparent package, causing the transparent package composed of an elastomer to undergo non-uniform deformation.

2. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 1, characterized in that: A first hollow tube is arranged between the first transparent encapsulation member and the second transparent encapsulation member, and the first transparent encapsulation member and the second transparent encapsulation member respectively cover the openings at both ends of the first hollow tube; The inner cavity of the first hollow tube serves as a liquid storage cavity.

3. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 2, characterized in that: At least one partition is arranged in the first hollow tube, and the partition divides the liquid storage cavity into two parts: a liquid injection cavity and a liquid discharge cavity. The liquid injection port is opened in the liquid injection cavity, the liquid discharge port is opened in the liquid discharge cavity, and the liquid discharge cavity is located on one side of the nearly transparent package; The central opening of the partition serves as the main hole. With the main hole as the center, the surface of the partition is divided into a number of annular areas, each of which is provided with a number of sub-holes, and the apertures or numbers of the sub-holes provided in different annular areas are inconsistent; the main hole and the sub-holes together constitute a through-hole array, and after the optical liquid medium flows through the through-hole array, the fluid flow rate at each location undergoes inconsistent changes.

4. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 2, characterized in that: A second hollow tube is nested in the first hollow tube, at least one end of the second hollow tube is open, and the open end faces the transparent packaging member made of elastic body; the liquid injection port is connected to the inner cavity of the second hollow tube, and the liquid discharge port is connected to the chamber outside the second hollow tube and inside the first hollow tube; The optical liquid medium flows through the transparent package, and the fluid flow rate at the position directly opposite to the opening end of the second hollow tube is inconsistent with that at the position not directly opposite to the opening end of the hollow tube. The fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the transparent package, causing the transparent package composed of an elastomer to undergo non-uniform deformation.

5. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 2, characterized in that: The first transparent encapsulation member is made of an elastic body, and the second transparent encapsulation member is made of a non-elastic body; A transparent, nonporous curved body is disposed on the liquid side of the second transparent packaging member; The optical liquid medium flows through the curved surface, and under the action of the curved surface, the flow velocity of the fluid at different locations undergoes inconsistent changes.

6. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 5, characterized in that: The aspheric liquid lens is used in combination with another aspheric liquid lens. The first transparent packaging parts of the two aspheric liquid lenses are close to each other and connected through a sleeve.

7. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 1, characterized in that: The first transparent encapsulation member and the second transparent encapsulation member are both made of elastic body, the edges of the first transparent encapsulation member and the second transparent encapsulation member are in direct contact, and the inner cavity surrounded by the two transparent encapsulation members serves as a liquid storage cavity; The liquid injection port and the liquid discharge port are respectively located at edge positions of the first transparent encapsulation member and the second transparent encapsulation member.

8. The aspherical liquid lens for adjusting focal length based on fluid flow rate according to claim 7, characterized in that: A partition is arranged along the joint position of the two transparent packaging parts, and the partition divides the liquid storage cavity into two parts: a liquid injection cavity and a liquid discharge cavity. The liquid injection port is arranged in the liquid injection cavity, and the liquid discharge port is arranged in the liquid discharge cavity. The central opening of the partition serves as the main hole. With the main hole as the center, the surface of the partition is divided into a number of annular areas, each of which is provided with a number of sub-holes, and the apertures or numbers of the sub-holes provided in different annular areas are inconsistent; the main hole and the sub-holes together constitute a through-hole array, and after the optical liquid medium flows through the through-hole array, the fluid flow rate at each location undergoes inconsistent changes.

9. The aspheric liquid lens for adjusting focal length based on fluid flow rate according to any one of claims 1 to 8, characterized in that: The optical liquid medium is a UV curing glue. After the liquid lens forms an aspheric surface, it is irradiated with UV light and cured into a solid aspheric lens.

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