Aspherical liquid lens with focal length adjustment based on fluid flow rate

Abstract

The application discloses a kind of aspherical surface liquid lens based on fluid flow rate regulation focal length, including first transparent packaging and second transparent packaging;At least one of two transparent packaging is elastic body that force generates deformation;Two transparent packaging have a storage liquid chamber with optical liquid medium between;The internal structure of storage liquid chamber is structured as: when optical liquid medium flows in storage liquid chamber, the flow rate of liquid flowing through each place of transparent packaging liquid side is inconsistent, fluid flow rate forms non-uniform distribution liquid side pressure effect to transparent packaging, so that the non-uniform deformation of transparent packaging formed by elastic body occurs.The application fluid flow rate forms non-uniform distribution liquid side pressure effect to uniform or non-uniform transparent packaging by the internal structure of storage liquid chamber, controls aspherical surface liquid lens surface type by fluid flow rate, realizes focal length regulation, with simple structure, simple preparation process, easy to use, and good imaging effect and the like advantages.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, in particular to a non-spherical liquid lens based on fluid flow rate adjusting focal length. BACKGROUND

[0002] In recent years, it has gradually become the development direction and trend of optical zoom system to meet the needs of compact structure, fast zoom response, high imaging quality and so on. The liquid lens technology inspired by the structure of human eye can achieve controllable focal length by changing the surface topography, i.e. lens surface type, and 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 reflective and transmissive types. Reflective liquid lenses are mainly used in large astronomical telescopes, while transmissive liquid lenses are the focus of research in the industry. According to the different application mechanisms, transmissive liquid lenses are mainly divided into three types:

[0004] Gradient refractive index lens: it adjusts the refractive index of liquid crystal by changing the voltage applied on the liquid crystal through physical or chemical methods, thereby realizing zoom. Gradient refractive index lens has high resolution, its control voltage is low, and it is easy to realize array; but the disadvantage is also obvious: it is sensitive to environmental temperature, the zoom range is small and the non-uniformity of liquid crystal in the electric field will bring large optical distortion, resulting in poor imaging quality.

[0005] Electro-wetting effect lens: it controls the surface shape of the liquid drop by changing the voltage, more accurately, it controls the wetting characteristics of the liquid on the solid surface by changing the applied voltage of the liquid-solid interface, thereby changing the contact angle of the liquid drop, so that it can change the curvature like the lens of the human eye to realize zoom. At the same time, the surface curvature changes with different applied voltages, thereby realizing optical zoom, which can achieve the expected zoom range.

[0006] Liquid-filled lens: it is a lens that changes the curvature of the lens surface by pumping in and pumping out liquid to change the curvature of the lens surface, uses a mechanical device to apply pressure to the liquid, thereby redistributing the liquid in the device and changing the radius of curvature of the lens. The driving power consumption of this liquid-filled lens is small, the size of the lens aperture is flexible, and the zoom range is large. But when the lens is larger, it is more sensitive to vibration and gravity, and the structure is more complex.

[0007] One of the main ways to form a liquid lens is to encapsulate an optical liquid with an elastic transparent member and to change the size of the pressure on the elastic member to deform it to obtain different surface shapes. A kind of aspheric liquid lens obtained by encapsulating optical liquid with non-uniform elastic transparent member can greatly improve the optical performance of the lens and improve the imaging quality. However, the preparation of non-uniform elastic transparent member is difficult, its integration with liquid lens is difficult, and the focusing range is limited, which makes its popularization and application prospect still difficult. SUMMARY

[0008] The present application aims to at least solve one of the technical problems existing in the related art, and for this purpose, the present application provides an aspheric liquid lens based on fluid flow rate to adjust focal length, which controls the aspheric surface shape of the liquid lens by fluid flow rate, realizes focal length adjustment, has simple structure, simple preparation process and convenient use.

[0009] In order to achieve the above purpose, the present application provides an aspheric liquid lens based on fluid flow rate to adjust focal length, which includes a first transparent encapsulating member and a second transparent encapsulating member.

[0010] At least one of the two transparent encapsulating members is an elastic body that deforms under stress.

[0011] The two transparent encapsulating members have a liquid storage cavity for accommodating an optical liquid medium between them. The liquid storage cavity is provided with at least one liquid injection port and at least one liquid discharge port. The liquid injection port is driven by an external driving device to inject or suck the optical liquid medium into the liquid storage cavity.

[0012] The internal structure of the liquid storage cavity is constructed as follows: when the optical liquid medium flows in the liquid storage cavity, the flow rates of the liquid flowing through different parts of the transparent encapsulating member are inconsistent. The fluid flow rate forms a non-uniform distribution of liquid side pressure effect on the transparent encapsulating member, causing the transparent encapsulating member composed of an elastic body to deform non-uniformly.

[0013] According to a further preferred technical solution of the present application, a first hollow tube is arranged between the first transparent encapsulating member and the second transparent encapsulating member, and the first transparent encapsulating member and the second transparent encapsulating member are respectively wrapped around the two end openings of the first hollow tube.

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

[0015] As a preferred solution, at least one partition plate is arranged in the first hollow tube, which is consistent with the shape of the opening of the first hollow tube. The partition plate divides the liquid storage cavity into two parts, i.e. 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 liquid discharge cavity is located near the transparent encapsulating member.

[0016] The center hole of the baffle plate is a main hole, and the surface of the baffle plate is divided into a plurality of annular regions with the main hole as the center, each annular region is provided with a plurality of sub-holes, and the diameters or numbers of the sub-holes in different annular regions are inconsistent; the main hole and the sub-holes jointly form a through-hole array, and the fluid flow rate at different positions changes inconsistently after the optical liquid medium flows through the through-hole array.

[0017] As preferred, the number of the baffle plates is consistent with the number of the transparent encapsulants composed of the elastomer.

[0018] As preferred, the main hole and the sub-holes on the baffle plate are one of circular, square or polygonal.

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

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

[0021] As preferred, the first hollow tube is provided with a second hollow tube nested therein, at least one end of the second hollow tube is open, and the open end is opposite to the transparent encapsulant composed of the elastomer; the liquid injection port is communicated with the inner cavity of the second hollow tube, and the liquid discharge port is communicated with the cavity on the outside of the second hollow tube and on the inside of the first hollow tube.

[0022] The optical liquid medium flows through the transparent encapsulant, and the fluid flow rate at the position opposite to the open end of the second hollow tube is inconsistent with the fluid flow rate at the position not opposite to the open end of the hollow tube, the fluid flow rate forms a non-uniformly distributed liquid side pressure effect on the transparent encapsulant, so that the transparent encapsulant composed of the elastomer is deformed non-uniformly.

[0023] As preferred, the first transparent encapsulant is composed of the elastomer, and the second transparent encapsulant is not composed of the elastomer.

[0024] The liquid side of the second transparent encapsulant is provided with a transparent non-porous curved surface body.

[0025] The optical liquid medium flows through the curved surface body, and the fluid flow rate at different positions changes inconsistently under the action of the curved surface body.

[0026] As preferred, the aspherical liquid lens is used in combination with another aspherical liquid lens, and the first transparent encapsulants of the two aspherical liquid lenses are close to each other and connected through a sleeve.

[0027] As preferred, the first hollow tube is one of a transparent circular tube, a square tube or a polygonal tube.

[0028] Preferably, the first and second transparent encapsulating members are both made of elastomer, and the edges of the first and second transparent encapsulating members are in direct contact, and the inner cavity surrounded by the two transparent encapsulating members serves as a liquid storage cavity.

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

[0030] Preferably, a partition plate is arranged at the joint of the two transparent encapsulating members, and the partition plate divides the liquid storage cavity into 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.

[0031] The partition plate has a central hole serving as a main hole, and the surface of the partition plate is divided into a plurality of annular regions with respect to the main hole, each annular region has a plurality of sub-holes, and the sub-holes in different annular regions have different diameters or numbers; the main hole and the sub-holes together form a through-hole array, and the fluid flow rate changes in different places after the optical liquid medium flows through the through-hole array.

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

[0033] Preferably, the sub-holes on the partition plate 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-holes in each annular region are the same, and the density of the sub-holes in each annular region gradually changes from dense to sparse or from sparse to dense from the center to the outside.

[0035] Preferably, the refractive index of the first and second transparent encapsulating members is the same as or similar 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 ultraviolet curing glue, and after the liquid lens forms a non-spherical surface, ultraviolet light is irradiated to solidify it into a solid non-spherical lens.

[0038] Preferably, the number of the liquid injection ports is equal to or different from the number of the liquid discharge ports.

[0039] Beneficial effects: the application designs a novel fluid flow rate adjusting focal length aspherical liquid lens structure, which is composed of first transparent packaging, liquid storage cavity and second transparent packaging to form sandwich structure, fluid flow rate forms non-uniform distribution liquid side pressure effect on uniform or non-uniform transparent packaging through the internal structure of liquid storage cavity, forms aspherical liquid lens, controls aspherical liquid lens surface type by fluid flow rate, realizes focal length adjustment, has the advantages of simple structure, simple preparation process, convenient use, good imaging effect and the like. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is the structure schematic diagram of embodiment 1 of the application.

[0041] Figure 2 It is the structure top view of embodiment 1 of the application.

[0042] Figure 3 It is the working principle schematic diagram of the convex lens of embodiment 1 of the application.

[0043] Figure 4 It is the working principle schematic diagram of the concave lens of embodiment 1 of the application.

[0044] Figure 5 It is the structure schematic diagram of embodiment 3 of the application.

[0045] Figure 6 It is the structure schematic diagram of embodiment 4 of the application.

[0046] Figure 7 It is the structure schematic diagram of embodiment 5 of the application.

[0047] Figure 8 It is the structure schematic diagram of embodiment 6 of the application.

[0048] Figure 9 It is the structure schematic diagram of embodiment 7 of the application.

[0049] Figure 10 It is the working principle schematic diagram of the convex lens of embodiment 7 of the application.

[0050] Figure 11 It is the working principle schematic diagram of the concave lens of embodiment 8 of the application.

[0051] Figure 12 It is the structure schematic diagram of embodiment 9 of the application.

[0052] Figure 13 It is the structure top view of embodiment 9 of the application.

[0053] Figure 14 It is the working principle schematic diagram of the convex lens of embodiment 9 of the application.

[0054] Figure 15 Schematic diagram of the working principle of the concave lens in embodiment 10 of the present invention.

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

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

[0057] Figure 18 It is a structural diagram of embodiment 13 of the present invention.

[0058] Figure 19 Schematic diagram of the working principle of the convex lens in embodiment 13 of the present invention.

[0059] Figure 20 Schematic diagram of the working principle of the concave lens in embodiment 14 of the present invention.

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

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

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

[0063] Description of reference numerals:

[0064] 1: first transparent packaging part, 2: liquid storage chamber, 2-1: liquid injection chamber, 2-2-liquid discharge chamber, 3: second transparent packaging part, 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 solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the embodiments described 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 making 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] The following combination Figure 1-Figure 23 The present invention provides an aspheric liquid lens that adjusts focal length based on fluid flow rate.

[0067] Embodiment 1: The embodiment provides a non-spherical liquid lens based on fluid flow rate adjusting focal length. It comprises:

[0068] Referring to Figure 1 , Figure 2 , it comprises a first transparent packaging member 1 and a second transparent packaging member 3 composed of an elastic body deformed by force, and a first hollow tube is arranged between the first transparent packaging member 1 and the second transparent packaging 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 the 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 end face and the lower end face of the first hollow tube, and the material is preferably PDMS (Polydimethylsiloxane).

[0070] The inner cavity of the first hollow tube serves as a liquid storage cavity 2, and two partitions 4 are arranged in the first hollow tube, which divide the liquid storage cavity 2 into one liquid injection cavity 2-1 and two liquid discharge cavities 2-2 located on both sides of the liquid injection cavity 2-1. The liquid injection cavity 2-1 is provided with a liquid injection port 5, and each of the two liquid discharge cavities 2-2 is provided with a liquid discharge port 6. The center of the partition 4 is provided with a main hole; the surface of the partition 4 is divided into a plurality of annular regions with the main hole as the center, and a plurality of sub-holes are arranged in each annular region. The main hole and the sub-holes jointly form a through-hole array 4-1.

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

[0072] In operation:

[0073] As shown in Figure 3 , the external driving 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-hole of the partition 4, and flows out of the cavity from the liquid discharge port 6. The liquid side pressure effect of the fluid flow rate on the elastic film of the first transparent packaging member 1 and the second transparent packaging member 3 causes the elastic film to be subjected to non-uniform stress and deformed to form a non-spherical liquid lens.

[0074] As shown in Figure 4As shown, the external driving device extracts the optical liquid 7 from the liquid injection port 5, changes the flow direction of the optical liquid 7 in the liquid storage cavity 2, and the atmospheric pressure will generate a reaction force on the elastic film of the first transparent packaging member 1 and the second transparent packaging member 3. The film is concave inward, the whole device constitutes a concave lens, the speed of the liquid extraction of the driving device is adjusted, the degree of deformation of the film is controlled, the surface shape parameters are changed, the focusing range is widened, and the application scenarios of the device are effectively increased.

[0075] In the above embodiment 1, the optical liquid 7 filled in the liquid storage cavity 2 is changed, which is preferably deionized water (H2O), and the effective clear aperture of the liquid lens is limited to the size of the main hole. The influence of the mismatching of the refractive index of the baffle 4 and the optical liquid 7 is avoided, and the manufacturing cost of the liquid lens is reduced.

[0076] In the above embodiment 1, as shown in the figure, Figure 5 two symmetrical liquid injection ports 5 are arranged on the side wall of the liquid injection cavity 2-1, and two symmetrical liquid discharge ports 6 are arranged on the side wall of the liquid discharge cavity 2-2. The radii of the liquid injection port 5 and the liquid discharge port 6 are 3mm and 1.5mm respectively, and the adjacent liquid injection port 5 and liquid discharge port 6 are orthogonal to each other.

[0077] When working, the external driving device injects the optical liquid 7 into the liquid injection cavity 2-1 from different directions through the liquid injection port 5. Because the number of the liquid injection port 5 and the liquid discharge port 6 changes, the adjustable variable of the liquid lens increases, the surface shape formed by the elastic film is more abundant, and the focal length adjustment is more accurate.

[0078] In the above embodiment 3, as shown in the figure, Figure 6 the radius of the main hole of the through-hole array 4-1 is adjusted to 5mm, the radius of the first-level sub-hole is 7mm, and the radius of the second-level sub-hole is 9mm. The outer layer sub-hole is more dense.

[0079] When working, the driving device injects the optical liquid 7 into the liquid injection cavity 2-1 from different directions through the liquid injection port 5. Because the radius of the array through hole of the baffle 4 changes, the adjustable variable of the liquid lens increases, the surface shape formed by the elastic film is more abundant, the focal length adjustment of the lens is more accurate, and the application range is more extensive.

[0080] In the above embodiment 3, as shown in the figure, Figure 7 the radius of the main hole of the through-hole array 4-1 is changed to 9mm, the radii of the first-level sub-hole and the second-level sub-hole are equal, both are 5mm, and the outer layer sub-hole is more sparse. When working, the driving device injects the optical liquid 7 into the liquid injection cavity 2-1 from different directions through the liquid injection port 5. Because the through-hole array 4-1 and the sub-hole arrangement of the baffle 4 change, the adjustable variable of the liquid lens increases, the surface shape formed by the transparent elastic film is more abundant, the focal length adjustment is more accurate, the processing and manufacturing difficulty is reduced, and the application range is more extensive.

[0081] Example 6: Based on the above-mentioned embodiment 3, as shown in Figure 8 the shape of the liquid storage cavity 2 is changed 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 end face and the lower end face of the liquid storage cavity 2 are each sealed with a piece of uniform transparent elastic film with a side length of 50 mm and a thickness of 0.1 mm, and the material is preferably polyimide; the liquid storage cavity 2 is divided into a liquid injection cavity 2-1 and a liquid discharge cavity 2-2 by two identical partitions 4 with a through-hole array 4-1, the partition 4 has a side length of 50 mm and a thickness of 1 mm, and the material is preferably high borosilicate glass, the main holes of the through-hole array 4-1 are rectangular with a side length of 9 mm, the first-level sub-holes are rectangular with a side length of 7 mm, and the second-level sub-holes are rectangular with a side length of 3 mm, and the sub-holes in the outer layers are more densely distributed; two liquid injection ports 5 and two liquid discharge ports 6 are respectively arranged on the side walls of the liquid injection cavity 2-1 and the liquid discharge cavity 2-2, with radii of 3 mm and 1.5 mm respectively; the optical liquid 7 filled in the liquid storage cavity 2 is preferably methyl silicone oil, and the refractive index thereof matches that of the partition 4.

[0082] In operation, the external driving 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 of through-holes of the partition 4, and flows out of the cavity from the liquid discharge port 6, and the liquid side pressure effect of the fluid flow rate on the elastic film causes it to be subjected to non-uniform stress and thus deformed to form a aspherical liquid lens. Adjusting the injection speed of the driving device can control the degree of deformation of the film, thereby changing the aspherical surface parameters, widening the focusing range, and the rectangular design can also increase the application range of the device.

[0083] Example 7: Based on the above-mentioned embodiment 1, as shown in Figure 9 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 selected to be an acrylic plate; the liquid storage cavity 2 is divided into a liquid injection cavity 2-1 and a liquid discharge cavity 2-2 by a partition 4 with a through-hole array 4-1, the liquid injection cavity 2-1 is provided with a liquid injection port 5, and the liquid discharge cavity 2-2 is provided with a liquid discharge port 6; the optical liquid 7 filled in the liquid storage cavity 2 is a sodium chloride solution, and the refractive index thereof matches that of the partition 4.

[0084] In operation, as shown in Figure 10As shown, the external driving device injects the optical liquid 7 into the injection cavity 2-1 through the injection port 5. Due to the blocking effect of the baffle 4, the optical liquid 7 can only flow into the drainage cavity 2-2 from the through-hole array 4-1 of the baffle 4 and generate a force on the top film. Due to the gradually reduced radius of the through-holes from the center to the periphery, the non-uniform stress on the film gradually decreases from the center to the periphery, so that the film is deformed 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 driving device, the degree of deformation of the film can be controlled, so that the aspherical surface parameters are changed, the focusing range is widened, and the application scenarios of the device are effectively increased.

[0085] Example 8: Based on the above-mentioned example 7, as shown in Figure 11 , the flow direction of the optical liquid 7 in the liquid storage cavity 2 is changed. The external driving device extracts the optical liquid 7 from the injection port 5. The atmospheric pressure generates a different reaction force on the elastic film than in example 7. The film is concave downward. The entire device constitutes a concave lens. By adjusting the extraction speed of the driving device, the degree of deformation of the film can be controlled, so that the surface parameters are changed, the focusing range is widened, and the application scenarios of the device are effectively increased.

[0086] Example 9: Based on the above-mentioned example 7, as shown in Figure 12 , Figure 13 , the baffle 4 with the through-hole array 4-1 is changed into a second hollow tube concentric with the first hollow tube. The radius of the second hollow tube is 15 mm, the height is 38 mm, and the material is acrylic (PMMA). The liquid storage cavity 2 is divided into two layers: the inner cavity is the injection cavity 2-1, and the outer cavity is the drainage cavity 2-2. The side wall of the drainage cavity 2-2 is provided with three circular drainage ports 6 with an included angle of 120°. The radius of the circular drainage port 6 is 1.5 mm. The side wall of the injection cavity 2-1 is provided with a circular injection port 5. The position of the circular injection port 5 is on the angle bisector of two adjacent drainage ports 6. The radius of the circular injection port 5 is 3 mm. The optical liquid 7 filled in the liquid storage cavity 2 is preferably a 30% concentration of sodium chloride solution, which can greatly reduce the freezing point of the optical liquid 7 and increase the application environment of the liquid lens device.

[0087] In operation, as shown in Figure 14 , the injection port 5 and the drainage cavity 2-2 are not communicated. The external driving device injects the optical liquid 7 into the injection cavity 2-1 through the injection port 5. After flowing into the drainage cavity 2-2, the optical liquid 7 is discharged out of the cavity from the drainage port 6. The film is subjected to a non-uniform stress that gradually decreases from the center to the periphery, so that the film is deformed 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 driving device, the degree of deformation of the film can be controlled, so that the aspherical surface parameters are changed, the focusing range is widened, and the application scenarios of the device are effectively increased.

[0088] Example 10: Based on the above-mentioned example 9, as shown in Figure 15As shown, the flow direction of the optical liquid 7 in the liquid storage cavity 2 is changed, and the optical liquid 7 is drawn out of the liquid injection port 5 by the external driving device. The atmospheric pressure will generate a reaction force on the elastic film, which is different from that of example 9. The film is concave downward, and the whole device forms a concave lens. By adjusting the speed of the liquid driving device, the degree of deformation of the film can be controlled, so as to change the surface shape parameters, widen the focusing range, and effectively increase the application scenarios of the device.

[0089] Example 11: Based on the above example 9, as shown in Figure 16 The shape of the liquid storage cavity 2 is changed from a circle to a rectangle with a side length of 50 mm and a thickness of 1 mm, and the material thereof is preferably high borosilicate glass; the liquid discharge cavity 2-2 has a side length of 50 mm and a height of 30 mm, and the liquid injection cavity 2-1 has a side length of 30 mm and a height of 28 mm; the first transparent packaging member 1 has a side length of 50 mm and a thickness of 0.1 mm, and the film material is PDMS (Polydimethylsiloxane); the side walls of the liquid injection cavity 2-1 and the liquid discharge cavity 2-2 are respectively provided with two symmetrical circular liquid injection ports 5 and liquid discharge ports 6 with a radius of 3 mm and 1.5 mm respectively, and the adjacent liquid injection ports 5 and liquid discharge ports 6 are orthogonal to each other.

[0090] In operation, the external driving device injects the optical liquid 7 into the liquid injection port 5, the optical liquid 7 flows from the liquid injection cavity 2-1 into the liquid discharge cavity 2-2 and is discharged out of the cavity from the liquid discharge port 6, and the film is subjected to a non-uniform stress gradually decreasing from the center to the periphery, so as to be deformed to form an aspherical surface shape. The whole device forms 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, so as to change the aspherical surface shape parameters, widen the focusing range, and effectively increase the application scenarios of the device.

[0091] Example 12: Based on the above example 9, as shown in Figure 17 The number of liquid injection ports 5 is increased, the liquid lens device changes due to the change in the number of liquid discharge ports 6 and liquid injection ports 5, the controllable variables are increased, and the surface shape formed by the first transparent packaging member 1 at the upper end is more abundant. On the basis of effectively eliminating spherical aberration, the focusing adjustment is more accurate.

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

[0093] When working, Figure 19 As shown, an external drive device is connected between the liquid inlet 5 and the liquid outlet 6 to circulate optical liquid 7 within the liquid storage chamber 2. Due to the fluid pressure and the obstruction of the lower end surface, the transparent elastic film is subjected to non-uniform stress that gradually decreases from the center to the periphery, forming an aspherical surface. The entire device thus constitutes an aspherical liquid lens, effectively eliminating spherical aberration. Adjusting the flow rate of the liquid drive device controls the degree of film deformation, thereby changing the aspherical surface parameters and widening the focusing range.

[0094] Example 14: Based on the above Example 13, Figure 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 using an external drive device, the transparent elastic film is subjected to downward pressure due to the pressure difference between the inside and outside, causing it to be concave toward the lower end surface of the liquid storage chamber, thereby making the entire device constitute a concave lens, broadening the scope of application of the present invention.

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

[0096] During operation, external drive devices are connected between the liquid injection port 5 and the liquid discharge port 6 of each lens, and optical liquid 7 circulates between the two main cavities, forming a concave-convex composite lens that corrects spherical aberration. If the two lens main cavities are filled with liquids with different refractive indices, achromatism can also be achieved, greatly expanding the scope and application of this lens.

[0097] Example 16: Based on the above Example 1, Figure 22 As shown, the first hollow tube is eliminated and a partition 4 with a through-hole array 4-1 is retained. The liquid lens device then consists of a first transparent package 1, a partition 4, and a second transparent package 3. The first transparent package 1 and the second transparent package 3 have a radius of 30 mm and a thickness of 1 mm, and are made of PDMS (polydimethylsiloxane) and polyimide. The partition 4 has a radius of 30 mm and a thickness of 1 mm, and is made of borosilicate glass. A liquid injection port 5 with a radius of 2 mm is provided on the side wall of the first transparent package 1, and a liquid discharge port 6 with a radius of 1.5 mm is provided on the side wall of the second transparent package 3. During operation, an external drive device injects 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 elastic member. By adjusting the liquid injection speed of the drive 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.

[0098] Embodiment 17: Based on the above-mentioned embodiment 16, as shown in the figure, the partition 4 with the array of through holes 4-1 is also cancelled, and the second transparent packaging member 3 is replaced by a transparent inelastic member, and the side wall of the second transparent packaging member 3 is provided with a liquid injection port 5 and a liquid discharge port 6; Figure 23

[0099] In 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, and the fluid flow rate forms a liquid side pressure effect on the first transparent packaging member 1, and the speed of the driving device for injecting liquid can control the degree of deformation of the elastic member, thereby changing the liquid lens surface parameter and widening the focusing range.

[0100] Embodiment 18: Based on the above-mentioned embodiment 17, the optical liquid 7 is replaced by transparent ultraviolet curing glue; in operation, the external driving device injects the transparent ultraviolet curing glue through the liquid injection port 5 and discharges it through the liquid discharge port 6, and the fluid flow rate forms a liquid side pressure effect on the elastic member, and the first transparent packaging member 1 at the top elastically deforms to form an aspherical surface, and according to the use requirements, the transparent ultraviolet curing glue can be ultraviolet cured under the surface matching condition to become an aspherical lens, the speed of the driving device for injecting liquid can change the liquid lens surface parameter to obtain various required aspherical lenses, greatly reducing the complexity of the liquid lens device and improving the use convenience and universality.

[0101] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. An aspheric liquid lens with focal length adjustment based on fluid flow rate, characterized in that: It comprises a first transparent encapsulating member and a second transparent encapsulating member; at least one of the two transparent encapsulating members 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 encapsulating members; a first hollow tube is provided between the first transparent encapsulating member and the second transparent encapsulating member, and the first and second transparent encapsulating members respectively cover the openings at both ends of the first hollow tube; the inner cavity of the first hollow tube serves as the liquid storage cavity; 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 aspirate the optical liquid medium into or out of the liquid storage cavity; At least one partition is provided in the first hollow tube, and the partition divides the liquid storage chamber into an injection chamber and a discharge chamber. The injection port is opened in the injection chamber, the discharge port is opened in the discharge chamber, and the discharge chamber is located on one side of the near 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 several annular areas, each annular area is provided with several sub-holes, and the apertures or numbers of the sub-holes opened in different annular areas are inconsistent. The main hole and the sub-holes together constitute a through-hole array. After the optical liquid medium flows through the through-hole array, the fluid flow rate at each location produces inconsistent changes, 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 aspheric liquid lens with focal length adjustment based on fluid flow rate according to claim 1, 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.

3. An aspheric liquid lens with focal length adjustment based on fluid flow rate, characterized in that: It comprises a first transparent encapsulating member and a second transparent encapsulating member; at least one of the two transparent encapsulating members 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 encapsulating members; a first hollow tube is provided between the first transparent encapsulating member and the second transparent encapsulating member, and the first and second transparent encapsulating members respectively cover the openings at both ends of the first hollow tube; the inner cavity of the first hollow tube serves as the liquid storage cavity; 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 aspirate the optical liquid medium into or out of the liquid storage cavity; A second hollow tube is nested in the first hollow tube, and at least one end of the second hollow tube is open, and the open end faces the transparent packaging member made of an 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 cavity outside the second hollow tube and inside the first hollow tube; When the optical liquid medium flows through the transparent package, the fluid flow rate at the position directly opposite the open end of the second hollow tube is inconsistent with that at the position not directly opposite the open end of the second 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.

4. An aspheric liquid lens with focal length adjustment based on fluid flow rate, characterized in that: It comprises a first transparent encapsulation member and a second transparent encapsulation member; the first transparent encapsulation member and the second transparent encapsulation member are both made of elastic bodies that are deformed by force; A liquid storage cavity containing an optical liquid medium is provided between the two transparent encapsulating members; the edges of the first transparent encapsulating member and the second transparent encapsulating member are in direct contact, and the inner cavity enclosed by the two transparent encapsulating members serves as the liquid storage cavity; 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 aspirate the optical liquid medium into or out of the liquid storage cavity; The liquid injection port and the liquid discharge port are respectively located at the edge of the first transparent package and the second transparent package; a partition is provided along the junction of the two transparent packages, the partition dividing the liquid storage cavity into 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; 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 several annular areas. Each annular area is provided with several 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. After the optical liquid medium flows through the through-hole array, the fluid flow rate at each location undergoes inconsistent changes. 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.

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